Infiniti Q70 2014-present 5.6L V8 Engine Bolt Torque Specifications & Fastener Values
Infiniti Q70 2014-present

Infiniti Q70 2014-present 5.6L V8 Engine Bolt Torque Specifications

Comprehensive bolt torque specifications for the 5.6L V8 engine in the 2014-Present Infiniti Q70. Includes detailed torque values for critical engine components.

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 valvetrain

Components that make up the cylinder head and valvetrain system, including cylinder head bolts, valve cover bolts, and rocker arm/shaft bolts.

1

Cylinder Head Bolts

M12 x 1.5
Torque Value
23 ft-lbs (31 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Value
4 ft-lbs (6 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Value
18 ft-lbs (25 N·m)

Engine block and bearings

Components that make up the engine block and bearing system, including main bearing bolts and connecting rod nuts.

1

Main Bearing Bolts

M14 x 1.5
Torque Value
61 ft-lbs (83 N·m)
2

Connecting Rod Nuts

M12 x 1.5
Torque Value
20 ft-lbs (27 N·m)

Timing and accessory components

Components that make up the timing and accessory system, including timing belt/chain tensioner bolts, camshaft sprocket bolts, and water pump bolts.

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Value
27 ft-lbs (37 N·m)
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Value
40 ft-lbs (54 N·m)
3

Water Pump Bolts

M8 x 1.25
Torque Value
6 ft-lbs (8 N·m)

Engine mounting and transmission components

Components that make up the engine mounting and transmission system, including engine block to transmission mounting bolts and engine block to engine mounting bolts.

1

Engine Block to Transmission Mounting Bolts

M14 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2

Engine Block to Engine Mounting Bolts

M12 x 1.5
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Oil and cooling system components

Components that make up the oil and cooling system, including oil pan bolts, oil filter cap, and engine oil cooler bolts.

1

Oil Pan Bolts

M10 x 1.5
Torque Value
71 ft-lbs (8 N·m)
2

Oil Filter Cap

M8 x 1.25
Torque Value
0 ft-lbs (0 N·m)
Important Notes
Hand tight + 3/4 turn
3

Engine Oil Cooler Bolts

M10 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

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 are the torque specifications for the cylinder head bolts on the 5.6L V8 engine?

The cylinder head bolts on the 5.6L V8 engine should be torqued in three stages: First, tighten to 29 lb-ft (39 Nm). Second, tighten an additional 90 degrees. Finally, tighten another 90 degrees. Always follow the manufacturer's sequence to avoid warping the cylinder head.

Q2

How often should I check the torque on engine components?

Torque checks should be performed during routine maintenance or after any major engine work. For the 5.6L V8 engine, it's recommended to inspect torque settings every 30,000 miles or as specified in the owner's manual. Loose bolts can lead to leaks or engine damage.

Q3

Can I reuse the connecting rod bolts on the 5.6L V8 engine?

No, connecting rod bolts on the 5.6L V8 engine are torque-to-yield (TTY) bolts and should not be reused. They must be replaced with new bolts during reassembly to ensure proper clamping force and prevent engine 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

A precision tool for applying accurate torque to engine bolts.

  • Adjustable torque settings
  • Digital display for precise readings
Learn more

Torque Angle Gauge

Used to measure the angle of rotation when applying torque to bolts.

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

Engine Torque Sequence Chart

A reference chart for the correct bolt tightening sequence.

  • Specific to 5.6L V8 engine
  • Easy-to-follow diagrams
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Detailed steps for properly torquing cylinder head bolts on the 5.6L V8 engine.

  • Clean the bolt threads and bolt holes thoroughly.
  • Apply a small amount of engine oil to the bolt threads.
  • Tighten bolts in the specified sequence to 30 Nm (22 ft-lbs).
  • Using a torque angle gauge, tighten bolts an additional 90 degrees.
  • Finally, tighten bolts an additional 90 degrees again.
View full procedure

Main Bearing Cap Bolt Torque Procedure

Steps for torquing main bearing cap bolts to ensure proper engine assembly.

  • Clean the bolt threads and bolt holes.
  • Apply engine oil to the bolt threads.
  • Tighten bolts in two stages: first to 50 Nm (37 ft-lbs), then to 80 Nm (59 ft-lbs).
  • Follow the specified tightening sequence.
View full procedure

Connecting Rod Bolt Torque Procedure

Procedure for torquing connecting rod bolts on the 5.6L V8 engine.

  • Clean the bolt threads and rod cap surfaces.
  • Apply engine oil to the bolt threads.
  • Tighten bolts to 25 Nm (18 ft-lbs).
  • Using a torque angle gauge, tighten bolts an additional 90 degrees.
View full procedure
Technical Service Bulletins

Incorrect Torque Specifications for Cylinder Head Bolts

2015-03-15

Reports of cylinder head bolt failures due to incorrect torque application.

2014-2016 Infiniti Q70 with 5.6L V8 engine

Resolution: Follow the updated torque specifications and sequence provided in the service manual.

Main Bearing Cap Bolt Loosening Issue

2017-08-22

Some vehicles experienced main bearing cap bolts loosening over time.

2014-2018 Infiniti Q70 with 5.6L V8 engine

Resolution: Ensure bolts are torqued to the correct specifications and re-check torque after initial engine break-in.

Connecting Rod Bolt Failure

2019-05-10

Instances of connecting rod bolt failures leading to engine damage.

2014-2020 Infiniti Q70 with 5.6L V8 engine

Resolution: Replace connecting rod bolts with updated parts and follow the revised torque procedure.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

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