Cadillac Vehicle Models DeVille 1994-1999 Torque Specifications
Cadillac Vehicle Models DeVille 1994-1999

Cadillac Vehicle Models DeVille 1994-1999 Torque Specifications

Complete Cadillac Vehicle Models DeVille 1994-1999 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

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Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

4.6l Engine

Torque specifications for 4.6L Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.75
Torque Specification
1. 18 ft-lbs (25 N·m) 2. 90° 3. 90°
Important Notes
Torque bolts in a specific sequence (center out, and in stages), then final torque-to-angle. Use new bolts for accurate torque values. Estimated values are based on typical M12 torque to yield sequences.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
6.7 ft-lbs (9 N·m)
Important Notes
Tighten evenly to prevent leaks, and potential damage to the valve cover. Estimated values based on similar M6 applications.
3

Valve Cover Studs (If Applicable)

M6 x 1.0
Torque Specification
6.7 ft-lbs (9 N·m)
Important Notes
Tighten evenly to prevent leaks, and potential damage to the valve cover. Estimated values based on similar M6 applications.
4

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts evenly to ensure proper valve action. Estimated value based on standard M8 application.

Engine Block

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 90° 3. 90°
Important Notes
Torque in sequence, following a specified pattern. Use new bolts. Estimated values based on typical torque to yield sequence
2

Oil Pan Bolts

M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Tighten evenly in a crisscross pattern to prevent leaks and distortion. Estimated value based on typical M6 applications
3

Oil Filter Housing Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper seal and prevent leaks. Estimated value based on similar M8 applications.
4

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use a new crush washer. Do not over-tighten, as this could damage the threads.
5

Water Pump Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten evenly to ensure proper seal and prevent coolant leaks. Estimated value based on similar M8 applications.
6

Knock Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Do not over-tighten; use a torque wrench to achieve accurate reading. Estimated value based on typical M8 applications.
7

Oil Pressure Sensor/Sending Unit

M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Do not over-tighten; use a torque wrench to achieve accurate reading.

Crankshaft

1

Connecting Rod Nuts

M9 x 1.25
Torque Specification
1. 24 ft-lbs (32 N·m) 2. 60°
Important Notes
Torque bolts in a specific sequence and then to an angle. Use new bolts. Estimated values based on similar M9 torque to yield sequence.
2

Flywheel Bolts

M10 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Ensure even tightening for secure mounting and proper balance.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Use proper torque and a harmonic balancer holding tool to prevent rotation. Estimated value based on standard M16 application.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the tensioner is properly positioned and functioning correctly.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of timing marks when installing the sprocket.
3

Timing Chain Guide Mounting Bolts

M6 x 1.0
Torque Specification
6.7 ft-lbs (9 N·m)
Important Notes
Tighten evenly. Estimated values based on similar M6 applications.

Intake System

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque bolts in a specified sequence to ensure a proper seal and prevent vacuum leaks.
2

Intake Manifold Upper/Lower Plenum Bolts

M6 x 1.0
Torque Specification
6.7 ft-lbs (9 N·m)
Important Notes
Tighten bolts evenly to prevent vacuum leaks, and potential damage to the intake manifold. Estimated values based on similar M6 applications.
3

Throttle Body to Intake Manifold Gasket Bolts/Nuts

M6 x 1.0
Torque Specification
6.7 ft-lbs (9 N·m)
Important Notes
Ensure even tightening for a proper seal. Estimated values based on similar M6 applications.
4

Fuel Rail Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent fuel leaks. Estimated values based on similar M6 applications.
5

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent fuel leaks, and potential damage to the fuel injector. Estimated values based on similar M6 applications.
6

EGR Valve Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to prevent exhaust leaks. Estimated value based on similar M8 applications.
7

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure a proper seal and prevent leaks. Estimated values based on similar M6 applications.
8

Coolant Temperature Sensor Bolt/Nut

M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not over tighten; use a torque wrench to achieve accurate reading. Estimated values based on similar M6 applications.

Exhaust System

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque bolts in a specific sequence to prevent exhaust leaks.
2

Exhaust Manifold to Exhaust Pipe Flange Bolts/Nuts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Tighten evenly to ensure proper seal and prevent exhaust leaks. Estimated value based on similar M10 applications.

Ignition System

1

Ignition Coil Bolts

M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not over-tighten; use a torque wrench to achieve accurate reading. Estimated value based on similar M6 applications.
2

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Use a new spark plug gasket. Do not over-tighten.
3

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not over tighten; use a torque wrench to achieve accurate reading. Estimated value based on similar M6 applications.
4

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not over tighten; use a torque wrench to achieve accurate reading. Estimated value based on similar M6 applications.

Cooling System

1

Water Pump Pulley Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to secure the pulley. Estimated value based on similar M8 applications.

4t80 Transmission

Torque specifications for 4t80 Transmission

External Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures transmission to engine block/chassis. Critical for alignment and stability.
2

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Connects drive axles to output flanges. Important for power transfer. Usually 6 bolts.
3

Torque Converter Bolts to Flexplate

M10 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 40 ft-lbs (54 N·m)
Important Notes
Connects torque converter to engine flexplate. Requires even torque to prevent vibrations. Tighten in a cross pattern, and repeat the sequence.
4

Transmission Cooler Line Fittings/Bolts to Transmission

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures cooler lines to transmission case. Prevents leaks, estimated value, verify.

Transmission Case

1

Transmission Case Bolts (Main Case Assembly)

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Holds case halves together. Ensure even tightening. Estimated value, verify.
2

Side Cover Bolts

M6 x 1
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Secures side cover, estimated value, verify.
3

Transmission Oil Pan Bolts

M6 x 1
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Secures fluid pan. Use a cross pattern to prevent warpage. Do not overtighten.

Fluid Plugs

1

Transmission Drain/Fill Plug

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
For drain and fill plugs. Use a new gasket if present.

Internal Components

1

Valve Body Bolts

M6 x 1
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Secures the valve body. Critical for proper operation. Estimated value, verify.

Body

Torque specifications for Body

Front Body Panels

1

Front Fender Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper fender alignment before final tightening. Estimated value.
2

Hood Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper hood alignment and smooth operation. Estimated value.
3

Hood Latch Bolt

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the latch operates smoothly and engages properly. Estimated value.

Rear Body Panels

1

Rear Fender/Quarter Panel Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper panel alignment before final tightening. Estimated value.

Doors

1

Door Hinge Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure smooth door operation and proper alignment. Estimated value.
2

Door Latch Striker Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure secure latching and proper door closure. Estimated value.

Bumpers

1

Bumper Mounting Bolts (Front and Rear)

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper bumper alignment and secure attachment. Estimated value.

Seating

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Critical for occupant safety. Ensure correct torque is applied. Estimated value.

Interior Trim

1

Dashboard/Instrument Panel Mounting Bolts/Screws

M6 x 1.0
Torque Specification
4.4 ft-lbs (7 N·m)
Important Notes
Torque range may vary; use appropriate value for material. Estimated value based on converted in-lbs.
2

Interior Trim Panel Fasteners/Screws (Various locations)

M4 x 0.7
Torque Specification
2.5 ft-lbs (3.4 N·m)
Important Notes
Low torque to avoid damaging plastic components; typical range is 20-40 in-lbs (2.2-4.5 Nm). Estimated value.

Lighting

1

Headlight Assembly Mounting Bolts/Screws

M5 x 0.8
Torque Specification
4.8 ft-lbs (6.5 N·m)
Important Notes
Do not over-torque. Typical range is 60-70 in-lbs (7-8 Nm). Estimated value based on converted in-lbs.
2

Tail Light Assembly Mounting Bolts/Screws

M5 x 0.8
Torque Specification
4.8 ft-lbs (6.5 N·m)
Important Notes
Do not over-torque. Typical range is 60-70 in-lbs (7-8 Nm). Estimated value based on converted in-lbs.

Brakes

Torque specifications for Brakes

Caliper Assembly

1

Caliper Guide Pin Bolts

M10 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
These bolts secure the caliper to the mounting bracket. Ensure proper alignment of the caliper over the brake rotor. These may be hex bolts or Allen head.
2

Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
These bolts secure the caliper mounting bracket to the steering knuckle or hub carrier. They are critical for the stability of the entire brake assembly. Ensure the mating surfaces are clean.

Rotor And Drum

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
These bolts, often screws or small bolts, secure the rotor or drum to the hub. They should be tightened evenly to avoid warping or runout. Clean surfaces before installing

Wheel Mounting

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
Ensure lug nuts are tightened in a star pattern to provide even clamping force across the wheel and rotor/drum. This ensures that the rotor is held evenly against the hub and the wheel is properly mounted. Torque specs should be verified based on wheel type, manufacturer, and vehicle.

Hydraulic System

1

Brake Line Fittings

Varies based on fitting (estimated M10 x 1.0)
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
These fittings connect brake lines to various components. Over-tightening may damage the fitting or crush washers, causing leaks. Under-tightening will cause leaks. Torque should be estimated based on the fitting size and material. This is an estimated value. Use a flare nut wrench when applicable.
2

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
These bolts secure the master cylinder to the firewall or brake booster. Ensure the master cylinder is flush with the mounting surface. This is an estimated value based on bolt size.
3

Brake Booster Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
These bolts secure the brake booster to the firewall. Ensure the booster is properly aligned. This is an estimated value based on bolt size.
4

Brake Bleeder Screw

M7 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Bleeder screws should be snug to ensure a tight seal, but over-tightening can damage the threads. This is an estimated value based on screw size and material. Always start by hand to avoid cross-threading.

Abs System

1

ABS Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
These bolts secure the ABS sensors to the hub or knuckle. Ensure the sensor is properly positioned to read the tone ring or exciter ring. This is an estimated value based on bolt size.

Drivetrain

Torque specifications for Drivetrain

Engine Flywheel

1

Flywheel Bolts

M12 x 1.25
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Ensure the flywheel is properly aligned before tightening. Use new bolts if specified.
2

Torque Converter to Flexplate Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the torque converter is properly seated against the flexplate. Use a thread locking compound if specified.

Transmission

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the transmission to the engine block or subframe. Apply anti-seize to the bolts if required by the manufacturer.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Tighten in a crisscross pattern. Use new gasket if necessary.
3

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use new crush washers if equipped. Ensure proper seating and do not over tighten.
4

Transmission Fluid Drain/Fill Plug

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use new crush washers if equipped. Ensure proper seating and do not over tighten.

Driveshaft

1

Drive Axle/Half Shaft Bolts (Inner)

M10 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Use new bolts if specified. Ensure the axle is properly seated into the transmission or differential before tightening.
2

CV Joint/Axle Nut (Outer)

M24 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
Use new axle nuts if specified. Ensure proper seating. Some applications may require an additional angular torque step.
3

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure proper alignment of the driveshaft before tightening. Use a thread locking compound if specified.

Differential

1

Differential Housing Mounting Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Ensure proper alignment of the differential housing to the chassis or subframe. Apply anti-seize to the bolts if required by the manufacturer.
2

Differential Drain/Fill Plug

M18 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new crush washers if equipped. Ensure proper seating and do not over tighten.
3

Front Differential Carrier Mounting Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Ensure proper alignment of the differential carrier to the chassis. Apply anti-seize to the bolts if required by the manufacturer.
4

Rear Differential Carrier Mounting Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Ensure proper alignment of the differential carrier to the chassis. Apply anti-seize to the bolts if required by the manufacturer.

Transfer Case

1

Transfer Case Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the transfer case to the transmission. Apply anti-seize to the bolts if required by the manufacturer.

Starter

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment of the starter to the engine block. Apply anti-seize to the bolts if required by the manufacturer.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure coil is properly seated before tightening. Over-tightening can damage the coil or mounting location.

Battery And Charging

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Do not over-tighten, as this can damage the battery post or terminal clamp. Ensure the terminals and posts are clean before installation.
2

Starter Motor Mounting Bolt

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten all bolts evenly. Ensure the starter is properly aligned with the flywheel before tightening.
3

Alternator Mounting Bolt

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure proper belt alignment before tightening the bolts. Over-tightening can damage mounting points.

Engine Management

1

Engine Control Module (ECM) Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Tighten evenly to avoid warping the ECM housing. Ensure proper alignment before tightening.

Power Distribution

1

Fuse Box/Power Distribution Center Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure good grounding by tightening to the specified torque. Over-tightening can damage the housing.
2

Grounding Strap/Cable Attachment Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure a clean, bare metal contact for proper grounding. Use a star washer if applicable. Torque to the correct value to ensure adequate electrical connection.
3

Grounding Strap/Cable Attachment Bolt (Small)

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure a clean, bare metal contact for proper grounding. Use a star washer if applicable. Torque to the correct value to ensure adequate electrical connection.

Lighting System

1

Headlight Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Do not over-tighten as this can crack or damage the headlight housing. Ensure alignment before final tightening.
2

Taillight Mounting Screw

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Tighten evenly to avoid damaging the taillight lens. Ensure the housing is flush against the body before tightening.

Module And Sensor Mounts

1

Relay/Module Mounting Bolt/Screw

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the relay or module is properly seated before tightening. Do not over-tighten as this can damage the module housing.
2

Speed Sensor Bolt

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure the sensor is properly aligned before tightening. Over-tightening may damage the sensor or mounting bracket.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the EGR valve mating surfaces are clean before installation. Use a criss-cross pattern when tightening the bolts.

Exhaust System

1

Exhaust Manifold/Header Bolts (to Cylinder Head)

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten in a sequence starting from the center and moving outward. Check for leaks after installation.
2

Exhaust Manifold/Header Bolts (Assembly)

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
These bolts may attach manifold sections together. Tighten in a sequence that ensures even compression of the joining surfaces
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment of the mating surfaces to avoid leaks. Use new gaskets or seals.
4

Oxygen (O2) Sensor (18mm Thread)

M18 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Apply anti-seize compound to the sensor threads. Do not over-torque, it can damage the sensor. Estimated value.
5

Oxygen (O2) Sensor (12mm Thread)

M12 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Apply anti-seize compound to the sensor threads. Do not over-torque, it can damage the sensor. Estimated value.

Intake System

1

Manifold Absolute Pressure (MAP) Sensor Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not overtighten the MAP sensor bolts, as this can damage the sensor or the intake manifold. Use a torque wrench.
2

Air Temperature Sensor (ATS) / Intake Air Temperature (IAT) Sensor Bolt

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure the sensor is seated properly before tightening. Do not overtighten the bolt, as the sensor housing is often made of plastic.
3

Mass Air Flow (MAF) Sensor Bolts

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure the MAF sensor is seated correctly. Do not over-torque, as this may damage sensor housing or cause air leaks. Confirm bolt size before applying torque. Estimated value.

Engine Sensors

1

Camshaft Position (CMP) Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure sensor is seated properly. Do not over-torque, may damage sensor or housing. Verify mounting material, if plastic be extra careful. Estimated value.
2

Crankshaft Position (CKP) Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure sensor is seated correctly. Do not over-torque, may damage sensor or housing. Verify mounting material, if plastic be extra careful. Estimated value.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold to Cylinder Head Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even pressure. Verify gasket is properly seated before tightening.
2

Exhaust Pipe to Exhaust Manifold/Header Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment of the exhaust pipe and manifold before tightening. These are often spring-loaded bolts.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the gasket is in good condition and properly seated. These are often flange-type connections.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust system is properly supported before tightening. These are often flange-type connections.

Exhaust Flange

1

Exhaust Flange Bolts (10mm)

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value for 10mm flange bolts. Ensure the gasket is in good condition before installation.
2

Exhaust Flange Bolts (12mm)

M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value for 12mm flange bolts. Ensure correct alignment of flanges.

Oxygen Sensor

1

Oxygen Sensor (New)

M18 x 1.5
Torque Specification
1. 2. 270°
Important Notes
Hand-tighten then turn 3/4 of a turn with a wrench. This is specific for new sensors. Using a torque wrench is not recommended. Estimated thread pitch.
2

Oxygen Sensor (Re-Installed)

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Do not over-tighten when re-installing. Estimated thread pitch.

Exhaust Hangers

1

Exhaust Hanger Bolts (small)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value for smaller hanger bolts. Ensure hangers are properly aligned before tightening.
2

Exhaust Hanger Bolts (large)

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value for larger hanger bolts. Check for proper alignment before tightening.

Heat Shields

1

Heat Shield Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Estimated value, typically small bolts. Be careful not to over tighten.
2

Heat Shield Bolts

M8 x 1.25
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Estimated value, typically small bolts. Be careful not to over-tighten.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent leaks. Use a cross-tightening pattern if multiple bolts are present. This is the same bolt as the fuel injector rail mounting bolts.

Fuel Injectors

1

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure injector o-rings are properly installed to prevent leaks. Use new o-rings if needed. These may be screws rather than bolts depending on the injector used in the system.

Fuel Pump

1

Fuel Pump Module Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure the fuel pump gasket is correctly positioned to prevent leaks. Use a new gasket if needed. Tighten evenly to ensure a proper seal.

Fuel Filter

1

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the filter bracket is properly aligned. Ensure all fittings and fuel lines are properly secured. This spec may also refer to mounting brackets for the filter.

Fuel Filler

1

Fuel Filler Neck Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure the filler neck is properly aligned with the fuel tank opening and the fuel cap properly seals to the neck. Tighten evenly to prevent leaks and ensure proper alignment.

Fuel Lines

1

Fuel Line Fitting/Connector

Varies Depending on Connection
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
This is an estimated torque value. Actual value depends on fitting type. Fuel line fittings can be easily over-tightened. Use a backup wrench if needed to prevent damage.
2

Fuel Filter Banjo Bolt

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
This is an estimated torque value. Ensure new crush washers are used at each side of the banjo fitting to prevent leaks.

Fuel Pressure Regulator

1

Fuel Pressure Regulator Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
This is an estimated torque value. Not all models have a bolt on style regulator. Check the specific vehicle design. Ensure all O-rings and gaskets are in place and in good condition.

Fuel Sending Unit

1

Fuel Tank Sending Unit Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
This is an estimated torque value. Not all models have a bolt on style sending unit. Check the specific vehicle design. Ensure all O-rings and gaskets are in place and in good condition.
2

Fuel Tank Sending Unit Retaining Ring

N/A
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
This is an estimated torque value. Torque spec may not apply, tighten to the best of your ability. Ensure all O-rings and gaskets are in place and in good condition.

Hvac

Torque specifications for Hvac

Ac Compressor

1

Compressor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure bolts are tightened evenly. Use a calibrated torque wrench.

Ac Lines

1

A/C Line Fittings

Varies (Typically M12-M18)
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque applies to various fitting sizes. Over-tightening can damage threads or seals. Use a backup wrench to prevent line twisting. Always use new o-rings when reinstalling A/C fittings

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value. Over-tightening can strip threads in the plastic housing. Use a calibrated in-lb torque wrench and convert ft-lb to in-lb. Do not over tighten!

Evaporator Core

1

Evaporator Housing Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value. Over-tightening can crack the housing. Use a calibrated in-lb torque wrench and convert ft-lb to in-lb. Do not over tighten!

Hvac Control Panel

1

Control Panel Mounting Screws

M4 x 0.7
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Estimated value. Over-tightening can damage the plastic. Use a calibrated in-lb torque wrench and convert ft-lb to in-lb. Do not over tighten!

Blend Door Actuator

1

Blend Door Actuator Mounting Screws

M5 x 0.8
Torque Specification
4 ft-lbs (6 N·m)
Important Notes
Estimated value. Over-tightening can damage the plastic actuator or the housing. Use a calibrated in-lb torque wrench and convert ft-lb to in-lb. Do not over tighten!

Expansion Valve

1

Expansion Valve Mounting Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value. Over-tightening can damage the o-rings or mating surfaces. Use a calibrated in-lb torque wrench and convert ft-lb to in-lb. Do not over tighten!

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure bolts are tightened evenly. Over-tightening can cause deformation of the mounting brackets or the condenser itself.

Suspension

Torque specifications for Suspension

Front Struts

1

Upper Strut Mount Bolts (to Body)

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
These bolts secure the top of the strut assembly to the vehicle's body. Ensure proper alignment before tightening. Estimated value based on similar applications.
2

Lower Strut to Steering Knuckle/Control Arm Bolts

M14 x 2.0
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
These bolts connect the lower part of the strut to the steering knuckle or control arm. These are high-load fasteners. Estimated based on similar applications.

Front Control Arms

1

Control Arm Bolts (Frame/Subframe)

M14 x 2.0
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the control arms to the vehicle's frame or subframe. Ensure the control arm is properly positioned before tightening.
2

Steering Knuckle/Spindle to Upper Control Arm Bolt/Nut

M14 x 2.0
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
This bolt secures the steering knuckle to the upper control arm. Check for proper alignment before tightening.
3

Ball Joint Nut

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
This nut secures the ball joint to the control arm or steering knuckle. Always use a new cotter pin. Verify proper orientation of castellated nut and cotter pin.

Steering Components

1

Tie Rod End Nut

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
This nut secures the tie rod end to the steering knuckle. Always use a new cotter pin. Verify proper orientation of castellated nut and cotter pin.

Sway Bar

1

Sway Bar Link Nut

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
These nuts attach the sway bar links to the sway bar and strut or control arm. Ensure proper orientation of the link components during assembly.
2

Sway Bar Mounting Bracket Bolts (to Frame)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
These bolts secure the sway bar brackets to the vehicle frame. Tighten to the specified torque to ensure the sway bar functions correctly. Estimated value based on similar applications.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What IS the proper torque specification for the lug nuts on my 1998 Cadillac DeVille?

The correct torque specification for the lug nuts on a 1998 Cadillac DeVille IS 100 ft-lbs (135 Nm).

Q2

What tools do I need to properly tighten bolts on my 1995 Cadillac DeVille?

To properly tighten bolts on a 1995 Cadillac DeVille, you will need a torque wrench, a socket set, and a set of wrenches.

Q3

How do I convert torque values from ft-lbs to Nm?

To convert torque values from ft-lbs to Nm, multiply the ft-lbs value by 1.356.

Q4

What are the consequences of over-tightening bolts?

Over-tightening bolts can stretch the bolts, damage the threads, or even cause the bolt to break.

Q5

What are the consequences of under-tightening bolts?

Under-tightening bolts can cause the bolts to loosen, which can lead to component failure.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the deville.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Engine and Component Bolt Torque Specifications

Complete torque specifications for the engine and engine components of a 1994-1999 deville.

  • Head bolts: 70-90 Nm (51-66 ft-lb)
  • Intake manifold bolts: 22-28 Nm (16-21 ft-lb)
  • Valve cover bolts: 8-12 Nm (6-9 ft-lb)
  • Exhaust manifold bolts: 25-35 Nm (18-26 ft-lb)
  • Oil pan bolts: 12-18 Nm (9-13 ft-lb)
View full procedure

Suspension and Brake Bolt Torque Specifications

Complete torque specifications for the suspension and brake components of a 1994-1999 deville.

  • Strut bolts: 80-100 Nm (59-74 ft-lb)
  • Control arm bolts: 50-70 Nm (37-51 ft-lb)
  • Tie rod bolts: 35-45 Nm (26-33 ft-lb)
  • Ball joint bolts: 60-80 Nm (44-59 ft-lb)
  • Brake caliper bolts: 25-35 Nm (18-26 ft-lb)
View full procedure

Interior and Exterior Bolt Torque Specifications

Complete torque specifications for the interior and exterior components of a 1994-1999 deville.

  • Dashboard bolts: 8-12 Nm (6-9 ft-lb)
  • Door panel bolts: 10-15 Nm (7-11 ft-lb)
  • Seat bolts: 25-35 Nm (18-26 ft-lb)
  • Bumper bolts: 30-40 Nm (22-29 ft-lb)
  • Headlight bolts: 15-20 Nm (11-15 ft-lb)
View full procedure
Technical Service Bulletins

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
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About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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