Infiniti QX60 2014-present 3.5L V6 Engine Bolt Torque Specifications & Fastener Values
Infiniti QX60 2014-present

Infiniti QX60 2014-present 3.5L V6 Engine Bolt Torque Specifications

Detailed torque specifications for the 3.5L V6 engine bolts in the 2014-Present Infiniti QX60, including cylinder head, intake manifold, exhaust manifold, 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 and engine block

Components that secure the cylinder head to the engine block, ensuring proper sealing and preventing engine damage.

1

Cylinder Head Bolts

M12 x 1.5
Torque Value
23.5 ft-lbs (32 N·m)
Important Notes
Estimated average value between 22-25 ft-lbs (30-34 Nm)
2

Engine Block to Transmission Mounting Bolts

M14 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Estimated average value between 40-50 ft-lbs (54-68 Nm)
3

Engine Block to Oil Pump Mounting Bolts

M10 x 1.5
Torque Value
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average value between 20-25 ft-lbs (27-34 Nm)

Main bearings and crankshaft

Components that hold the main bearings in place, supporting the crankshaft and maintaining engine stability.

1

Main Bearing Bolts

M16 x 1.5
Torque Value
83 ft-lbs (113 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Value
119 ft-lbs (161 N·m)

Camshaft and valve train

Components that operate the engine's valves and maintain performance.

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Value
57.5 ft-lbs (78 N·m)
2

Rocker Arms/Shafts Bolts

M12 x 1.5
Torque Value
23.5 ft-lbs (32 N·m)

Timing belt/chain and tensioner

Components that maintain proper timing and prevent engine damage.

1

Timing Belt/Chain Tensioner Bolt

M12 x 1.5
Torque Value
35 ft-lbs (48 N·m)

Intake and exhaust manifolds

Components that direct airflow and exhaust gases, maintaining engine performance.

1

Intake Manifold Bolts

M10 x 1.5
Torque Value
12 ft-lbs (16 N·m)
2

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Value
23.5 ft-lbs (32 N·m)

Fuel system

Components that supply fuel to the engine's cylinders, maintaining performance.

1

Fuel Rail Bolts

M10 x 1.5
Torque Value
12 ft-lbs (16 N·m)
2

Fuel Injector Bolts

M8 x 1.25
Torque Value
7 ft-lbs (10 N·m)

Ignition system

Components that provide the spark necessary for engine operation.

1

Spark Plugs

M14 x 1.25
Torque Value
14.5 ft-lbs (20 N·m)
2

Ignition Coil Bolt

M8 x 1.25
Torque Value
7 ft-lbs (10 N·m)

Cooling system

Components that circulate coolant and maintain engine temperature.

1

Water Pump Bolts

M10 x 1.5
Torque Value
12 ft-lbs (16 N·m)
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Value
9.5 ft-lbs (13 N·m)

Sensors and electronics

Components that provide critical engine timing information and monitor engine performance.

1

Crankshaft Position Sensor Bolt

M8 x 1.25
Torque Value
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average value between 10-15 ft-lbs (14-20 Nm)
2

Camshaft Position Sensor Bolt

M8 x 1.25
Torque Value
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average value between 10-15 ft-lbs (14-20 Nm)

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 torque specification for the cylinder head bolts on the 3.5L V6 engine?

The cylinder head bolts on the 3.5L V6 engine should be tightened to 90 Nm (Newton meters) in a specific sequence to ensure even pressure distribution. Always follow the manufacturer's torque sequence to prevent engine damage.

Q2

How often should I check the torque on engine bolts?

It is recommended to check the torque on engine bolts during routine maintenance, typically every 12 months or 15,000 miles. If you notice any unusual engine noises or vibrations, inspect the bolts immediately.

Q3

Can I reuse bolts after disassembling the engine components?

Some bolts, especially those with specific torque requirements like cylinder head bolts, should not be reused. Always replace them with new bolts to ensure proper torque and engine integrity.

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

A precision tool for applying the correct torque to engine bolts.

  • Adjustable torque settings
  • Digital display for accuracy
Learn more

Torque Angle Gauge

Used to measure the angle of rotation when torque-to-yield bolts are used.

  • Magnetic base for easy attachment
  • Clear angle markings
Learn more

Engine Torque Sequence Chart

A reference chart for the correct tightening sequence of engine bolts.

  • Specific to 3.5L V6 engine
  • Easy-to-read layout
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Detailed steps for torquing cylinder head bolts on the 3.5L V6 engine.

  • Clean the bolt threads and bolt holes.
  • Apply engine oil to the threads and under the bolt heads.
  • Tighten bolts in the specified sequence to the initial torque value.
  • Use a torque angle gauge to turn the bolts an additional specified angle.
View full procedure

Main Bearing Cap Bolt Torque Procedure

Procedure for torquing main bearing cap bolts on the 3.5L V6 engine.

  • Clean the bolt threads and bolt holes.
  • Apply engine oil to the threads and under the bolt heads.
  • Tighten bolts in the specified sequence to the initial torque value.
  • Use a torque angle gauge to turn the bolts an additional specified angle.
View full procedure

Intake Manifold Bolt Torque Procedure

Steps for torquing intake manifold bolts on the 3.5L V6 engine.

  • Clean the bolt threads and bolt holes.
  • Apply engine oil to the threads and under the bolt heads.
  • Tighten bolts in the specified sequence to the specified torque value.
View full procedure
Technical Service Bulletins

Engine Bolt Torque Specification Update

2022-05-15

Updated torque specifications for certain engine bolts on the 3.5L V6 engine.

2014-2023 Infiniti QX60

Resolution: Refer to the latest service manual for updated torque values and procedures.

Cylinder Head Bolt Failure Advisory

2021-08-10

Advisory regarding potential cylinder head bolt failures due to incorrect torque application.

2014-2020 Infiniti QX60

Resolution: Ensure proper torque sequence and values are followed during cylinder head installation.

Main Bearing Cap Bolt Inspection Notice

2020-03-25

Notice to inspect main bearing cap bolts for proper torque and potential loosening.

2014-2019 Infiniti QX60

Resolution: Inspect and retorque main bearing cap bolts as per the service manual.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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