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

Cadillac XTS 2013-2019 3.6L Engine Bolt Torque Specifications

Detailed torque specifications for various bolts on the 3.6L engine of the 2013-2019 Cadillac XTS. Includes cylinder head, main bearing, connecting rod, and other critical component torque values.

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

Torque specifications for bolts and fasteners related to the cylinder head assembly, ensuring proper sealing and compression.

1

Cylinder Head Bolts

M11 x 1.5
Important Notes
Tighten in specified sequence. Final torque is achieved through angle tightening after initial torque value.
2

Cylinder Head Cover/Camshaft Carrier Bolts

M8 x 1.25
Important Notes
The camshaft carrier also serves as the cylinder head cover. Tighten in a two-step torque sequence.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Secures rocker arm shafts to the cylinder head.

Crankshaft And Rotating Assembly

Specifications for bolts and fasteners related to the crankshaft, connecting rods, and flywheel/flexplate.

1

Main Bearing Bolts

M12 x 1.75
Important Notes
Critical for securing crankshaft. Tighten in a two step torque procedure.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Secures connecting rod caps to connecting rods.
3

Flywheel Bolts

M10 x 1.5
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Secures the flywheel to the crankshaft.
4

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the crankshaft pulley/harmonic balancer to the crankshaft.

Engine Timing System

Torque specifications for bolts and fasteners related to the engine timing components.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the timing chain tensioner.
2

Camshaft Sprocket Bolts

M10 x 1.5
Torque Value
73 ft-lbs (99 N·m)
Important Notes
Secures camshaft sprockets to the camshafts.

Engine Lubrication System

Torque specifications for bolts and fasteners related to the engine lubrication system.

1

Oil Pan Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures the oil pan to the engine block. Note torque value is in ft-lbs to match the original data.
2

Oil Drain Plug

M14 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Seals the oil pan drain. Use a new crush washer on installation.
3

Oil Filter Housing Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Hand Tight. Do not overtighten. Value is an estimated value based on typical values for this bolt size.

Engine Cooling System

Torque specifications for bolts and fasteners related to the engine cooling system.

1

Water Pump Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures water pump to the engine block. Note torque value is in ft-lbs to match the original data.
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures water pump pulley to water pump hub.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures the thermostat housing. Note torque value is in ft-lbs to match the original data.
4

Engine Coolant Temperature (ECT) Sensor

M12 x 1.5
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Torque spec for the sensor that threads into the engine.

Intake And Fuel System

Specifications for bolts and fasteners related to the intake manifold, throttle body, and fuel system components.

1

Intake Manifold Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures the intake manifold to the cylinder heads. Note torque value is in ft-lbs to match the original data.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures the throttle body to the intake manifold. Note torque value is in ft-lbs to match the original data.
3

Fuel Rail Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures the fuel rail to the intake manifold or cylinder head. Note torque value is in ft-lbs to match the original data.
4

Fuel Injector Bolts

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures fuel injectors to intake manifold or cylinder head. Note torque value is in ft-lbs to match the original data.
5

Mass Air Flow (MAF) Sensor Bolts

M5 x 0.8
Torque Value
5.9 ft-lbs (8 N·m)
Important Notes
Secures the MAF sensor to the intake. Note torque value is in ft-lbs to match the original data.

Exhaust System

Torque specifications for bolts and fasteners related to the exhaust manifolds and EGR valve.

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the exhaust manifolds to the cylinder heads.
2

EGR Valve Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the EGR valve to the intake or exhaust manifold.

Engine Sensors And Electronics

Torque specifications for bolts and fasteners related to various engine sensors and electronic components.

1

Knock Sensor Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures knock sensors to the engine block or intake manifold.
2

Camshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Mounts the camshaft position sensors to the engine. Note torque value is in ft-lbs to match the original data.
3

Crankshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures the crankshaft position sensor to the engine. Note torque value is in ft-lbs to match the original data.
4

Variable Valve Timing (VVT) Solenoid Bolt

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures VVT solenoids to the cylinder heads. Note torque value is in ft-lbs to match the original data.
5

Ignition Coil Bolt

M6 x 1.0
Torque Value
6.7 ft-lbs (9 N·m)
Important Notes
Secures ignition coils. Note torque value is in ft-lbs to match the original data.

Accessory Drive

Torque specifications for bolts and fasteners related to the accessory drive system.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the belt tensioner to the engine.
2

Drive Belt Idler Pulley Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the idler pulley to the engine.

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 so important for the 3.6L engine?

Accurate torque specifications are critical to ensure proper sealing, prevent component damage, and maintain the structural integrity of the 3.6L engine in your Cadillac XTS. Over-tightening can lead to bolt failure, stripped threads, or warped components like the cylinder head. Under-tightening can cause leaks, loosening, and potentially catastrophic engine failure.

Q2

Can I reuse bolts when working on the 3.6L engine?

In many cases, reusing bolts is not recommended, especially for critical engine components. Torque-to-yield (TTY) bolts, common in engine assemblies, stretch upon installation and should always be replaced. While some non-TTY bolts may be reusable, it's best practice to refer to the service manual and replace any bolts that are stretched, corroded, or show signs of wear. Ignoring this can compromise the integrity of your engine.

Q3

What happens if I don't use a torque wrench?

Using a torque wrench is essential for achieving the correct fastener tension. Without one, you risk either over or under-tightening bolts, leading to the issues previously mentioned. You may believe you're tightening to the proper level, but 'feel' is not accurate. Especially on cylinder heads or other critical components, using a torque wrench and following the specified sequence is necessary for proper engine function.

Q4

Where can I find the complete torque specifications for my 3.6L Cadillac XTS?

The most accurate and comprehensive torque specifications for your 3.6L Cadillac XTS can be found in the official Cadillac service manual for your specific model year. You can often find these manuals online or purchase them from reputable automotive parts stores. Other sources such as Alldata or Mitchell On Demand are reputable and reliable as well. General information found on internet forums should always be verified against these official sources.

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 inch drive)

A calibrated torque wrench capable of measuring torque in the range needed for engine components.

  • Audible click indicates achieved torque
  • Easy to read scale
Learn more

Torque Wrench (3/8 inch drive)

A calibrated torque wrench capable of measuring torque in the lower range needed for engine components.

  • Audible click indicates achieved torque
  • Easy to read scale
Learn more

Socket Set (Metric)

A set of metric sockets in various sizes, including those commonly used on the 3.6L engine.

  • 6-point sockets for better grip
  • Deep and shallow sockets
Learn more

Extension Bars (various lengths)

Extension bars of different lengths to access hard-to-reach fasteners.

  • Various lengths to reach different bolts
  • Durable construction
Learn more

Universal Joint

A universal joint to allow for angled access to fasteners.

  • Swiveling head for angled access
  • Durable construction
Learn more
Service Procedures

Intake Manifold Installation

Procedure for properly torquing the intake manifold bolts on a 3.6L engine.

  • Clean the intake manifold and cylinder head mating surfaces.
  • Position the intake manifold on the cylinder head.
  • Install the intake manifold bolts, tightening them in the proper sequence.
  • Tighten the bolts to 10 Nm (89 lb-in) for initial pass, then again to 22 Nm (16 lb-ft) with proper torque sequence.
  • Verify torque using a calibrated torque wrench.
View full procedure

Cylinder Head Installation

Procedure for properly torquing the cylinder head bolts on a 3.6L engine.

  • Clean the cylinder head and engine block mating surfaces.
  • Position the cylinder head on the engine block.
  • Install new cylinder head bolts, tightening them in the proper sequence.
  • Tighten the bolts to 30 Nm (22 lb-ft), then tighten an additional 70 degrees using an angle meter/gauge, then a final 50 degrees. Verify torque.
  • Verify torque using a calibrated torque wrench.
View full procedure

Valve Cover Installation

Procedure for properly torquing the valve cover bolts on a 3.6L engine.

  • Clean the valve cover and cylinder head mating surfaces.
  • Position the valve cover on the cylinder head.
  • Install the valve cover bolts, tightening them in the proper sequence.
  • Tighten the bolts to 10 Nm (89 lb-in).
  • Verify torque using a calibrated torque wrench.
View full procedure

Connecting Rod Cap Installation

Procedure for properly torquing the connecting rod cap bolts on a 3.6L engine.

  • Ensure connecting rod caps are properly aligned.
  • Install the connecting rod cap bolts, tightening them in the proper sequence.
  • Tighten the bolts to 20 Nm (15 lb-ft), then tighten an additional 70 degrees using an angle meter/gauge.
  • Verify torque using a calibrated torque wrench.
View full procedure

Main Bearing Cap Installation

Procedure for properly torquing the main bearing cap bolts on a 3.6L engine.

  • Ensure main bearing caps are properly aligned.
  • Install the main bearing cap bolts, tightening them in the proper sequence.
  • Tighten the bolts to 40 Nm (30 lb-ft), then tighten an additional 60 degrees using an angle meter/gauge.
  • Verify torque using a calibrated torque wrench.
View full procedure
Technical Service Bulletins

Excessive Oil Consumption Due to Cylinder Head Bolt Issues

2016-08-15

Some 3.6L engines may experience excessive oil consumption due to improper torque on the cylinder head bolts, leading to head gasket issues.

2013-2016

Resolution: Verify cylinder head bolt torque, replace head gasket if necessary. Retorque to specification.

Intake Manifold Gasket Leakage

2017-02-20

A small percentage of 3.6L engines may experience intake manifold gasket leaks due to improper bolt torque during assembly.

2014-2017

Resolution: Inspect intake manifold for gasket leaks. If present, replace gasket and ensure proper bolt torque.

About the Author

Expert automotive knowledge and experience

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.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

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.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 Cadillac Specs. All rights reserved.

Privacy Policy Terms of Service