Chrysler Aspen 2007-2009 5.7L Engine Bolt Torque Specifications & Fastener Values
Chrysler Aspen 2007-2009

Chrysler Aspen 2007-2009 5.7L Engine Bolt Torque Specifications

Comprehensive guide to torque specifications for various bolts on the 5.7L engine in the 2007-2009 Chrysler Aspen. Includes cylinder head, intake manifold, exhaust manifold, and other critical bolt torques.

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 components related to the cylinder heads, including the cylinder head bolts themselves, rocker arms, and related hardware. Critical for proper sealing and valve actuation.

1

Cylinder Head Bolts

M11 x 1.5
Important Notes
Cylinder head bolts require a multi-step torque sequence involving an initial torque value followed by two angle torque steps. Always follow the correct tightening pattern in the service manual. This sequence is critical for proper head gasket sealing.
2

Rocker Arm Shaft Bolts

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
These bolts secure the rocker arm shafts. Ensure correct torque to prevent binding or excessive clearance.
3

Camshaft Bearing Cap Bolts

M8 x 1.25
Important Notes
Camshaft bearing caps must be torqued in sequence to avoid binding the camshaft. Torque in steps as shown, also lubricate threads with clean engine oil. Estimated value, check service manual

Bottom End

Torque specifications for components within the engine block, including main bearing caps, connecting rods, flywheel, and oil pan.

1

Main Bearing Bolts

M12 x 1.75
Important Notes
Main bearing bolts should be torqued in sequence to ensure even pressure distribution, lubricate threads with clean engine oil.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure connecting rod cap is properly aligned before torquing. Lube threads with clean engine oil.
3

Flywheel/Flexplate Bolts

M11 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Ensure flywheel or flexplate is properly seated against the crankshaft flange.
4

Oil Pan Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent leaks. Torque is low to prevent damage to the oil pan flange. 105 inch-lbs converted to ft-lbs.
5

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Use a new crush washer to ensure a proper seal.
6

Oil Filter Housing Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent leaks. Torque is low to prevent damage to the oil filter housing. 105 inch-lbs converted to ft-lbs.

Timing System

Specifications for timing-related parts, including the tensioner, camshaft sprockets, crankshaft pulley, and timing cover.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure proper tensioner function after torquing.
2

Camshaft Sprocket Bolts

M10 x 1.25
Torque Value
75 ft-lbs (101 N·m)
Important Notes
Ensure proper camshaft and crankshaft timing before tightening. These bolts should be tightened in the final step of timing installation
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
130 ft-lbs (176 N·m)
Important Notes
This bolt is critical for proper accessory drive and vibration damping. Ensure the balancer is fully seated on the crankshaft snout before tightening.
4

Timing Cover Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent leaks. Torque is low to prevent damage to the timing cover. 105 inch-lbs converted to ft-lbs. Estimated value, check service manual.

Intake System

Torque specifications for components related to the intake system, including the throttle body and intake manifold.

1

Throttle Body Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent vacuum leaks. 105 inch-lbs converted to ft-lbs.
2

Intake Manifold Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
Torque these bolts evenly in a criss-cross pattern to prevent leaks. 105 inch-lbs converted to ft-lbs.
3

Intake Manifold Runner Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
Torque these bolts evenly in a criss-cross pattern to prevent leaks if applicable. 105 inch-lbs converted to ft-lbs. Estimated value, check service manual.

Exhaust System

Specifications for exhaust manifold or headers to cylinder head connections

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use new gasket for proper sealing, and torque evenly to prevent leaks. May need retorquing after heat cycles.

Valve Train

Specifications for components related to the valve train such as valve covers.

1

Valve Cover Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent leaks. 105 inch-lbs converted to ft-lbs.

Ignition System

Specifications for ignition components.

1

Ignition Coil Bolt

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to ensure proper grounding. 105 inch-lbs converted to ft-lbs.

Fuel System

Specifications for fuel system components, including injectors and fuel rail.

1

Fuel Injector Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent fuel leaks. 105 inch-lbs converted to ft-lbs.
2

Fuel Injector Rail Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent fuel leaks. 105 inch-lbs converted to ft-lbs.

Cooling System

Torque specs for cooling system parts like the water pump and thermostat housing.

1

Water Pump Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent coolant leaks. 105 inch-lbs converted to ft-lbs.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly. 105 inch-lbs converted to ft-lbs.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These bolts should be torqued evenly to prevent coolant leaks. 105 inch-lbs converted to ft-lbs.

Sensors

Specifications for various sensors located on the engine.

1

Knock Sensor Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
These bolts must be torqued to specification to ensure proper sensor operation. Estimated value, check service manual
2

Coolant Temperature Sensor (CTS)

M10 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
These sensors read coolant temperature and should be torqued to spec to prevent issues with readings and leaking. Estimated value, check service manual
3

Crankshaft Position Sensor (CKP)

M6 x 1.0
Torque Value
8.75 ft-lbs (12 N·m)
Important Notes
These sensors read the position of the crankshaft. Proper torque is essential to ensure reliable data. 105 inch-lbs converted to ft-lbs. Estimated value, check service manual

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 is using the correct torque specifications important?

Using the correct torque specifications is crucial to ensure proper clamping force, preventing leaks, component damage, and potential engine failure. Under-tightening can lead to leaks and loosened bolts, while over-tightening can cause bolts to stretch, break, or damage threads in the engine block or components. This affects the overall reliability and lifespan of your 5.7L engine.

Q2

What kind of torque wrench should I use?

It's best to use a calibrated torque wrench. For most of the 5.7L engine bolts, a 3/8" or 1/2" drive torque wrench will be appropriate. For smaller bolts use a 1/4" drive. Ensure the wrench's range covers the required torque specification and that it is calibrated according to the manufacturers recommendations. Using an accurate torque wrench is crucial for proper torquing.

Q3

What happens if I can't find the torque spec for a particular bolt?

If a specific torque spec isn't readily available, you should consult the official Chrysler service manual for your 2007-2009 Aspen. Generic torque values for bolt sizes should only be used as a very last resort after extensive research. When in doubt, always seek guidance from a certified mechanic. Using incorrect values could damage your 5.7L engine.

Q4

Should I use new bolts when reassembling my 5.7L engine?

For critical components, such as cylinder head bolts, connecting rod bolts, and main cap bolts, it's generally recommended to use new bolts. Many of these bolts are designed as torque-to-yield (TTY) bolts, meaning they stretch during tightening and should not be reused. Ignoring this can cause reduced clamping force and component failure.

Q5

Do I need to lubricate bolts before tightening?

Yes, depending on the bolt type. Some bolts, such as head bolts, require a specific engine oil or lubricant on the threads and under the bolt head. Check the specific instructions for each bolt in the service manual to avoid improper torquing. Lubrication helps achieve accurate torque readings and avoids galling of threads.

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 calibrated tool to apply precise torque to fasteners.

  • Various drive sizes (1/4
  • 3/8
  • 1/2" etc.)
  • Ability to set torque values in ft-lbs or Nm
Learn more

Socket Set

A variety of sockets to fit various fastener sizes.

  • Metric and SAE sizes
  • Various drive sizes
Learn more

Extension Bars

Used to reach fasteners in difficult locations.

  • Variety of lengths
  • Various drive sizes
Learn more

Universal Joint

Allows sockets to be used at angles.

  • Variety of drive sizes
  • Allows access to hard-to-reach bolts
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Steps for torquing cylinder head bolts for the 5.7L engine.

  • Clean all bolt threads and holes
  • Apply engine oil to bolt threads and under bolt heads
  • Torque all cylinder head bolts in the specified sequence to 22 ft-lbs (30 Nm)
  • Torque all long cylinder head bolts to an additional 90 degrees (1/4 turn) rotation
  • Torque all medium cylinder head bolts to an additional 90 degrees (1/4 turn) rotation
  • Torque all short cylinder head bolts to an additional 70 degrees rotation
View full procedure

Intake Manifold Bolt Torque Procedure

Steps for torquing the intake manifold bolts.

  • Clean all bolt threads and holes
  • Apply engine oil to bolt threads and under bolt heads
  • Torque intake manifold bolts to 105 in-lbs (12 Nm) in the specified sequence
View full procedure

Exhaust Manifold Bolt Torque Procedure

Steps for torquing the exhaust manifold bolts.

  • Clean all bolt threads and holes
  • Apply anti seize to bolt threads
  • Torque exhaust manifold bolts to 23 ft-lbs (31 Nm) in the specified sequence
View full procedure

Connecting Rod Bolt Torque Procedure

Steps for torquing the connecting rod bolts.

  • Clean all bolt threads and holes
  • Apply engine oil to bolt threads and under bolt heads
  • Torque connecting rod bolts to 20 ft-lbs (27 Nm)
  • Rotate bolts an additional 90 degrees (1/4 turn)
View full procedure

Main Bearing Cap Bolt Torque Procedure

Steps for torquing the main bearing cap bolts.

  • Clean all bolt threads and holes
  • Apply engine oil to bolt threads and under bolt heads
  • Torque main bearing cap bolts to 30 ft-lbs (41 Nm)
  • Rotate the long bolts an additional 90 degrees (1/4 turn)
  • Rotate the short bolts an additional 65 degrees
View full procedure
Technical Service Bulletins

Engine Noise After Repair

2008-05-15

Some 2007-2008 models may experience a knocking noise after recent engine repair. This may indicate improper torque sequence on cylinder head bolts.

2007-2008

Resolution: Re-check torque sequence and cylinder head bolts

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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