Cadillac ATS 2013-2019 3.6L Engine Bolt Torque Specifications & Fastener Values
Cadillac ATS 2013-2019

Cadillac ATS 2013-2019 3.6L Engine Bolt Torque Specifications

Comprehensive guide to torque specifications for various bolts on the 3.6L V6 engine found in the 2013-2019 Cadillac ATS. Includes cylinder head bolts, intake manifold bolts, exhaust manifold bolts, and other critical fasteners.

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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

Cylinder Head

Components related to the cylinder head, including the head bolts, valve cover, and camshaft components.

1

Cylinder Head Bolts

M12 x 1.75
Important Notes
Use new bolts. Tighten in specified sequence. Perform the initial torque, then the two angle torque steps.
2

Valve Cover Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly. Avoid over-tightening.
3

Camshaft Sprocket Bolts

M10 x 1.5
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Ensure camshaft is properly timed before tightening.
4

Rocker Arm/Shaft Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts evenly.
5

Camshaft Position Sensor (CMP) Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated before tightening. Sensor is typically located at the cylinder head.
6

Variable Valve Timing (VVT) Solenoid Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated before tightening.

Engine Block

Components directly related to the engine block, crankshaft, and oil system.

1

Main Bearing Bolts

M12 x 1.75
Important Notes
Use new bolts. Tighten in specified sequence, perform initial torque, then the angle torque.
2

Connecting Rod Nuts

M9 x 1.25
Important Notes
Use new nuts. Tighten in specified sequence, perform initial torque, then angle torque.
3

Flywheel Bolts

M10 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Ensure flywheel is correctly positioned. Use new bolts.
4

Oil Pan Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Tighten bolts evenly in a criss-cross pattern. Be careful not to overtighten and damage the pan.
5

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure tensioner is in proper position.
6

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Use new bolt.
7

Crankshaft Position Sensor (CKP) Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated before tightening. Sensor is typically located on the engine block.
8

Knock Sensor Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure sensor is properly seated.
9

Oil Pressure Sensor

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated before tightening.
10

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Always replace crush washer.
Page 1 of 2

Intake Exhaust

Components related to air intake, fuel delivery, and exhaust systems.

1

Intake Manifold Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten bolts evenly in a criss-cross pattern.
2

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use new gaskets. Tighten evenly.
3

Throttle Body Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Be careful not to overtighten.
4

EGR Valve Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment. Use new gasket.
5

Fuel Rail Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment.
6

Fuel Injector Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment. Avoid over-tightening.
7

Intake Manifold Runner Control Valve Actuator Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment before tightening.

Cooling System

Components related to engine cooling, including the water pump and thermostat.

1

Water Pump Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Use new gasket.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Tighten evenly.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Use new gasket or o-ring. Tighten evenly.
4

Coolant Temperature Sensor

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated.

Accessories

Components related to the accessory drive system, including belt tensioners and pulleys.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure tensioner is properly aligned.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper alignment.

Ignition System

Components related to the ignition system.

1

Spark Plugs

M14 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not overtighten, use anti-seize if necessary.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure coil is properly seated.

Oil Filter

Components related to oil filtration.

1

Oil Filter Cap

N/A - Hand Tight if o-ring, Estimated 20 Nm (15 ft-lbs) if NO o-ring
Torque Value
15 ft-lbs (20 N·m)
Important Notes
If the oil filter cap uses an o-ring, it should be hand tightened. If it uses a hard sealing surface without an o-ring, use 15 ft-lbs (20 N·m). Estimated value.

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

Why are torque specifications important when working on the 3.6L engine?

Correct torque specifications are crucial to ensure proper clamping force between components, preventing leaks, and avoiding damage. Under-torquing can lead to loosening and leaks, while over-torquing can damage threads, distort parts, or cause component failure. For example, overtightening cylinder head bolts could warp the head or compromise the gasket seal, leading to coolant or oil leaks.

Q2

Do I need to use new bolts when reassembling components of the 3.6L engine?

It's generally recommended to use new torque-to-yield (TTY) bolts whenever they are removed. TTY bolts are designed to stretch a specific amount when torqued and are not intended for reuse. Many fasteners on the 3.6L engine, such as cylinder head bolts and connecting rod bolts, are TTY. Reusing them can compromise clamping force and cause serious engine damage. Using new bolts ensures proper clamping and helps avoid failure.

Q3

What happens if I don't follow the specified tightening sequence for 3.6L engine components?

Following the correct tightening sequence, typically a spiral pattern or stage sequence, ensures even distribution of clamping force across the mating surfaces. Ignoring the sequence can cause uneven pressure, potentially leading to leaks, component warping, and damage to gaskets. For instance, unevenly tightening the intake manifold can cause vacuum leaks, affecting engine performance.

Q4

Can I use a generic torque wrench for all 3.6L engine torque specs?

While a generic torque wrench is sufficient for many applications, it is crucial to ensure it is calibrated for the torque range you are using. Using a torque wrench with an inaccurate reading can lead to over or under-tightening. Especially with lower torque values, such as those used for sensors, it is essential to use a tool in the appropriate range. Regular calibration of your wrench is highly recommended to ensure accuracy.

Q5

What's the difference between lb-ft and lb-in when referring to torque specifications for the 3.6L engine?

Pound-feet (lb-ft) and pound-inches (lb-in) are both units of torque, but lb-ft is commonly used for larger fasteners, like engine block bolts or cylinder head bolts, while lb-in is used for smaller, more delicate components like sensors or valve covers. One lb-ft is equal to 12 lb-in. Confusing these units can lead to severe over-tightening of small parts when applying a larger lb-ft value.

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

Torque Wrench (1/2" Drive)

A calibrated torque wrench capable of accurately measuring torque values within the specified range for engine components.

  • Audible click or digital display to indicate achieved torque
  • Wide torque range to accommodate various fasteners
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench capable of accurately measuring torque values within the specified range for smaller engine components.

  • Audible click or digital display to indicate achieved torque
  • Smaller size for tight spaces
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets in various sizes to match the fasteners on the 3.6L engine.

  • Variety of socket sizes (e.g., 8mm-19mm)
  • 6-point sockets for secure grip
  • Deep sockets for accessing recessed bolts
Learn more

Socket Extensions

Various lengths of socket extensions to access hard-to-reach fasteners.

  • Multiple lengths for varying access requirements
  • Durable construction for consistent force transmission
Learn more

Universal Joint

A universal joint adapter to allow socket to reach fasteners at an angle.

  • Allows for angled access to fasteners
  • Durable construction for consistent force transmission
Learn more

Thread Lubricant

Specific thread lubricant, such as engine oil or anti-seize, as specified in the service manual for certain fasteners.

  • Provides proper lubrication to avoid improper torque readings
  • Prevents galling of fasteners
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure (3.6L V6)

Detailed steps for correctly torquing the cylinder head bolts on the 3.6L V6 engine. This procedure is critical for proper engine sealing and function.

  • Clean cylinder head and block mating surfaces thoroughly.
  • Install new cylinder head bolts.
  • Tighten all bolts in sequence to 22 lb ft (30 Nm)
  • Tighten bolts in sequence a second time to 22 lb ft (30 Nm).
  • Tighten bolts in sequence 75° and then another 45°
  • Final Angle tighten all bolts in sequence 20°
View full procedure

Intake Manifold Bolt Torque Procedure (3.6L V6)

Detailed steps for correctly torquing the intake manifold bolts on the 3.6L V6 engine. Improper torque can cause vacuum leaks.

  • Clean intake manifold and cylinder head mating surfaces thoroughly.
  • Install new intake manifold gaskets.
  • Hand-tighten all bolts.
  • Tighten all bolts in sequence to 89 lb-in (10 Nm).
  • Tighten all bolts in sequence again to 89 lb-in (10 Nm).
View full procedure

Camshaft Bearing Cap Bolt Torque Procedure (3.6L V6)

Detailed steps for correctly torquing the camshaft bearing cap bolts on the 3.6L V6 engine.

  • Apply engine oil to bolt threads.
  • Install camshaft bearing cap bolts.
  • Tighten all bolts in sequence to 89 lb-in (10 Nm).
  • Tighten all bolts in sequence an additional 30°
View full procedure

Connecting Rod Cap Bolt Torque Procedure (3.6L V6)

Detailed steps for correctly torquing connecting rod cap bolts. This is a critical process for proper connecting rod function and engine reliability.

  • Apply engine oil to the bolt threads and under the bolt heads.
  • Tighten all bolts to 15 lb ft (20 Nm).
  • Tighten bolts an additional 70° in sequence
  • Remove one bolt at a time and replace with a new bolt. Tighten to 15 lb ft (20 Nm) and then 70 degrees.
View full procedure
Technical Service Bulletins

Engine Oil Leak from Timing Cover

2016-03-15

Some 2013-2016 models may experience an oil leak from the timing cover area due to improper sealing. Ensure bolts are torqued to specification and the surface is clean.

2013-2016

Resolution: Inspect timing cover gasket, ensure proper bolt torque is applied to timing cover bolts (89 lb-in (10Nm)) and use proper sealant if necessary.

Cylinder Head Gasket Issues

2017-11-20

Some 2017-2019 models may exhibit head gasket failure due to improper torque on the cylinder head bolts. Verify proper torque sequence and angles.

2017-2019

Resolution: Verify the cylinder head bolts are torqued correctly (22 lb ft (30 Nm), then 75°, then 45° and then 20°). Replace gasket if necessary.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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