Chrysler 300 2005-2010 5.7L Engine Bolt Torque Specifications & Fastener Values
Chrysler 300 2005-2010

Chrysler 300 2005-2010 5.7L Engine Bolt Torque Specifications

Comprehensive guide to the torque specifications for various bolts on the 5.7L engine of the 2005-2010 Chrysler 300. Includes cylinder head, intake manifold, exhaust manifold, and other critical component 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 head bolts, valve train components, and exhaust manifolds.

1

Cylinder Head Bolts

M12 x 1.75
Important Notes
Requires a specific tightening sequence. Tighten all bolts to the initial torque of 20 ft-lbs (27 Nm) using the proper sequence, then follow the angle-torque procedure of 90 degrees, then 90 degrees. Refer to the service manual for the exact sequence.
2

Rocker Arm/Shaft Bolts

M8 x 1.25
Torque Value
21 ft-lbs (28 N·m)
Important Notes
Ensure proper alignment of rocker arm shafts during installation.
3

Exhaust Manifold/Header Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Tighten bolts in a specific sequence, working from the center outward, to ensure even clamping pressure and prevent exhaust leaks.
4

Spark Plugs

M14 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Do not over-tighten spark plugs to avoid damaging threads in the cylinder head.

Engine Block

Torque specifications for components attached to the engine block, including main bearings, connecting rods, and the oil pan.

1

Main Bearing Bolts

M12 x 1.75
Torque Value
100 ft-lbs (136 N·m)
Important Notes
Tighten main bearing bolts in a specific sequence. Lubricate threads prior to installation. Refer to the service manual for the exact sequence.
2

Connecting Rod Nuts

M9 x 1.0
Important Notes
Use new rod nuts, lubricate threads, tighten all to 20 ft-lbs (27 Nm) then angle torque an additional 60 degrees. Refer to the service manual for the tightening sequence
3

Oil Pan Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten oil pan bolts in a criss-cross pattern to ensure even pressure on the gasket and prevent leaks. Do not overtighten.
4

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer and do not overtighten.
5

Water Pump Bolts

M8 x 1.25
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten bolts evenly to avoid damaging the pump or causing coolant leaks. Do not overtighten.

Front Engine

Torque specifications for components located on the front of the engine, such as the crankshaft pulley, timing components, and belt drive.

1

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
105 ft-lbs (142 N·m)
Important Notes
Ensure proper seating of the harmonic balancer on the crankshaft. Do not reuse the original bolt.
2

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Correct torque is critical for proper timing chain tension. Refer to the service manual for correct procedure.
3

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Proper torque is crucial for maintaining valve timing. Refer to the service manual for correct timing procedure.
4

Water Pump Pulley Bolts

M8 x 1.25
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure the pulley sits flush against the hub. Do not over tighten.
5

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure proper belt tension after installation.
6

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Ensure proper pulley alignment and free rotation after installation.

Intake System

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

1

Intake Manifold Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten bolts in a specific sequence working from the center outward to ensure proper sealing.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten bolts evenly to ensure proper sealing of the throttle body.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure the thermostat is properly seated in the housing. Do not over tighten.

Fuel System

Torque specifications for components of the fuel system including fuel injectors and the fuel rail.

1

Fuel Injector Bolts

M6 x 1.0
Torque Value
21 ft-lbs (28 N·m)
Important Notes
Ensure proper injector alignment and sealing.
2

Fuel Injector Rail Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Do not over tighten the fuel rail bolts, this can cause damage.

Sensors

Torque specifications for various sensors located on the engine.

1

Crankshaft Position Sensor (CKP) Mounting Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure the sensor is properly seated against the mounting surface.
2

Camshaft Position Sensor (CMP) Mounting Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure the sensor is properly seated against the mounting surface.
3

Knock Sensor Mounting Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure proper contact between the sensor and the engine block.
4

Engine Coolant Temperature (ECT) Sensor

M12 x 1.5
Torque Value
13 ft-lbs (18 N·m)
Important Notes
Apply Teflon tape or sealant to the threads to ensure a good seal.
5

Oxygen Sensor (O2 Sensor)

M18 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Ensure the sensor threads are clean and apply anti-seize if necessary.

Other

Torque specifications for components not categorized above.

1

Valve Cover Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten valve cover bolts evenly in a criss-cross pattern to ensure proper sealing.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure proper seating and electrical contact of the ignition coils.
3

PCV Valve Fitting

1/2" NPT
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Apply Teflon tape or sealant to threads to prevent leaks.
4

Flywheel Bolts

M11 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Apply threadlocker to bolts, tighten in a star pattern.
5

Oil Filter Cap

N/A
Torque Value
0 ft-lbs (0 N·m)
Important Notes
Hand tight only to prevent over-tightening.
6

Oil Filter Housing Bolt

N/A
Torque Value
0 ft-lbs (0 N·m)
Important Notes
Hand tight only, do not over-tighten to prevent damage to the plastic housing.

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 important?

Torque specifications ensure proper clamping force between components. Under-tightening can lead to leaks or loosening, while over-tightening can damage threads, deform parts, or cause fasteners to break, potentially leading to engine damage. For example, over-tightening a cylinder head bolt on the 5.7L can warp the head, leading to a blown head gasket.

Q2

What is the difference between ft-lbs and Nm?

Ft-lbs (foot-pounds) and Nm (Newton-meters) are both units of torque measurement. Ft-lbs is a standard unit of measurement in the US, while Nm is the standard unit internationally. You can use conversion calculators online to switch between the two if necessary. When referencing specifications for the 5.7L engine, ensure you're using the correct unit.

Q3

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

Using a torque wrench is highly recommended. While you might get away with approximating tightness by feel on some smaller non-critical components, this is highly discouraged with critical engine components like the connecting rod bolts or cylinder head bolts on your 5.7L. Incorrect torque can have very serious consequences. Rent or borrow a torque wrench to do the job safely and correctly.

Q4

Should I use new bolts every time I disassemble the engine?

For critical components like head bolts and connecting rod bolts on the 5.7L, it is strongly recommended to replace them with new ones each time you disassemble these sections of the engine. These bolts are typically torque-to-yield and can stretch permanently after use, compromising their clamping force and reliability. Reusing them can lead to failure. Check your service manual for specific recommendations.

Q5

What does 'torque-to-yield' mean?

Torque-to-yield (TTY) bolts are designed to stretch slightly during the tightening process. This stretch creates clamping force, and the bolt is designed to be used only once. Reusing them will not allow for the same amount of stretch, resulting in improper clamping force and potential failure. Head bolts and connecting rod bolts are often TTY on the 5.7L.

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 used to apply a specific amount of torque to a fastener.

  • Accurate torque measurement
  • Various drive sizes available (3/8", 1/2")
Learn more

Socket Set

A set of sockets of various sizes to fit different bolt heads.

  • Metric and/or Standard sizes
  • Various depths
Learn more

Extension Bars

Used to extend the reach of a socket or ratchet.

  • Various lengths
  • Helpful for hard-to-reach fasteners
Learn more

Universal Joint

Allows sockets to be used at an angle.

  • Various drive sizes
  • Helpful for fasteners at an angle
Learn more

Thread Chaser

Used to clean and restore threads that may be damaged or corroded.

  • Different sizes available
  • Ensures accurate torque readings
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Procedure for tightening the cylinder head bolts on a 5.7L HEMI engine.

  • Clean threads of the block and bolt, apply a small amount of clean engine oil to bolt threads and underside of bolt head.
  • Install all cylinder head bolts, tighten in sequence to 25 ft-lbs.
  • Tighten bolts in sequence to 50 ft-lbs.
  • Tighten all bolts in sequence, turning an additional 90 degrees.
  • Tighten all bolts in sequence, turning an additional 90 degrees.
View full procedure

Intake Manifold Bolt Torque Procedure

Procedure for tightening the intake manifold bolts on a 5.7L HEMI engine.

  • Install all intake manifold bolts.
  • Tighten in sequence to 45 in-lbs.
  • Tighten in sequence to 85 in-lbs.
View full procedure

Exhaust Manifold Bolt Torque Procedure

Procedure for tightening the exhaust manifold bolts on a 5.7L HEMI engine.

  • Install all exhaust manifold bolts.
  • Tighten all bolts in sequence to 25 ft-lbs.
View full procedure

Rocker Arm Shaft Bolt Torque Procedure

Procedure for tightening the rocker arm shaft bolts on a 5.7L HEMI engine.

  • Install all rocker arm shaft bolts.
  • Tighten bolts to 21 ft-lbs.
View full procedure
Technical Service Bulletins

Oil Leakage from Cylinder Head Bolts

2008-05-15

Some 5.7L HEMI engines may experience oil leakage from the cylinder head bolts. This is due to inadequate sealing.

2005-2008 Chrysler 300 2005-2008 Dodge Charger 2005-2008 Dodge Magnum

Resolution: Clean all bolt and block threads, apply sealant to the bolts (Mopar part # 05011577AA), reinstall bolts using the correct torque sequence and values.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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