RAM Ram 2500 2010-2018 6.4L V8 Engine Bolt Torque Specifications & Fastener Values
RAM Ram 2500 2010-2018

RAM Ram 2500 2010-2018 6.4L V8 Engine Bolt Torque Specifications

Get the detailed bolt torque specifications for the 6.4L V8 engine in your 2010-2018 Ram 2500. This page provides the recommended torque values for various 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 secure the cylinder head, valvetrain, and related accessories.

1

Cylinder Head Bolts

M12 x 1.5
Torque Value
20 ft-lbs (27 N·m)
2

Rocker Arms/Shafts Bolts

M10 x 1.25
Torque Value
20 ft-lbs (27 N·m)
3

Valve Cover Bolts

M8 x 1.25
Torque Value
105 in-lbs (12 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for accurate information.

Engine block and crankshaft

Components that secure the engine block, crankshaft, and related accessories.

1

Main Bearing Bolts

M14 x 1.5
Torque Value
100 ft-lbs (135 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
130 ft-lbs (176 N·m)
3

Engine Block to Transmission Mounting Bolts

M12 x 1.5
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for accurate information.

Camshaft and timing system

Components that secure the camshaft, timing belt/chain, and related accessories.

1

Camshaft Sprocket Bolt

M12 x 1.5
Torque Value
45 ft-lbs (61 N·m)
2

Timing Belt/Chain Tensioner Bolt

M10 x 1.25
Torque Value
18 ft-lbs (24 N·m)

Intake and exhaust system

Components that secure the intake manifold, exhaust manifold, and related accessories.

1

Intake Manifold Bolts

M10 x 1.25
Torque Value
105 in-lbs (12 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for accurate information.
2

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Value
30 ft-lbs (41 N·m)

Fuel system

Components that secure the fuel rail, fuel injectors, and related accessories.

1

Fuel Rail Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
2

Fuel Injector Bolts

M10 x 1.25
Torque Value
105 in-lbs (12 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for accurate information.

Cooling system

Components that secure the water pump, thermostat housing, and related accessories.

1

Water Pump Bolts

M10 x 1.25
Torque Value
105 in-lbs (12 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for accurate information.
2

Thermostat Housing Bolts

M8 x 1.25
Torque Value
105 in-lbs (12 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for accurate information.

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 importance of proper torque specs for the 6.4L-V8 engine?

Proper torque specs ensure the engine's components are securely fastened, preventing damage, leaks, and premature wear. Incorrect torque can lead to costly repairs, decreased performance, and compromised safety.

Q2

How often should I check and maintain the torque specs of my 6.4L-V8 engine?

It's recommended to check torque specs during routine maintenance, such as oil changes, and after any repairs or replacements. Additionally, if you notice any unusual engine noises, vibrations, or performance issues, inspect the torque specs to ensure they are within specifications.

Q3

Can I use a torque wrench with a built-in angle gauge for the 6.4L-V8 engine?

Yes, a torque wrench with a built-in angle gauge can be used for the 6.4L-V8 engine. However, ensure the wrench is calibrated and suitable for the specific torque specs required. Always follow the manufacturer's instructions and guidelines for proper use.

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

A torque wrench is required to ensure accurate and safe tightening of engine bolts.

  • High-precision torque measurement
  • Adjustable torque range
Learn more

Socket Set

A socket set is necessary for accessing and tightening engine bolts.

  • Metric and SAE socket sizes
  • Ratchet and extension included
Learn more

Breaker Bar

A breaker bar is recommended for applying high torque values.

  • Long handle for increased leverage
  • Socket adapter included
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure

This procedure outlines the steps for tightening the cylinder head bolts on the 6.4L-V8 engine.

  • Remove valve cover and spark plug wires
  • Apply threadlocker to cylinder head bolts
  • Tighten cylinder head bolts in sequence to 30 ft-lbs
  • Tighten cylinder head bolts an additional 90 degrees
View full procedure

Main Bearing Bolt Tightening Procedure

This procedure outlines the steps for tightening the main bearing bolts on the 6.4L-V8 engine.

  • Remove oil pan and bearing caps
  • Apply threadlocker to main bearing bolts
  • Tighten main bearing bolts in sequence to 50 ft-lbs
  • Tighten main bearing bolts an additional 120 degrees
View full procedure
Technical Service Bulletins

TSB 14-001-14: Cylinder Head Bolt Tightening Specification Update

2014-02-14

This bulletin updates the cylinder head bolt tightening specification for the 6.4L-V8 engine.

2010-2014 Ram 2500

Resolution: Update the cylinder head bolt tightening specification to 30 ft-lbs + 90 degrees

TSB 16-002-16: Main Bearing Bolt Failure

2016-04-15

This bulletin addresses a potential issue with main bearing bolt failure on the 6.4L-V8 engine.

2015-2016 Ram 2500

Resolution: Inspect and replace main bearing bolts as necessary

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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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.
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