Chrysler Concorde 1998-2004 3.2L Engine Bolt Torque Specifications & Fastener Values
Chrysler Concorde 1998-2004

Chrysler Concorde 1998-2004 3.2L Engine Bolt Torque Specifications

Detailed torque specifications for various bolts on the 3.2L engine found in the 1998-2004 Chrysler Concorde. Includes 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

Torque specifications for the cylinder head and associated components. Proper torque is critical for maintaining a tight seal and preventing leaks.

1

Cylinder Head Bolts

M11 x 1.5
Important Notes
Tighten in sequence. Refer to service manual for the specific tightening sequence.
2

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Tighten in a crisscross pattern to ensure even pressure and prevent leaks.
3

Rocker Arm/Shaft Bolts

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Ensure rocker arms are properly aligned before tightening.

Crankshaft

Torque specifications for components related to the crankshaft and its rotation. Proper torque is crucial for engine balance and longevity.

1

Main Bearing Bolts

M12 x 1.75
Torque Value
100 ft-lbs (136 N·m)
Important Notes
Tighten in a specified sequence. Consult service manual. This is for the main cap bolts.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure connecting rod caps are properly seated.
3

Flywheel Bolts

M10 x 1.5
Torque Value
75 ft-lbs (102 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
4

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
110 ft-lbs (149 N·m)
Important Notes
Ensure the pulley is correctly aligned on the crankshaft.

Engine Timing

Torque specifications for components critical to engine timing. Proper torque is essential for correct engine operation and preventing damage.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
21 ft-lbs (28 N·m)
Important Notes
Convert from inch pounds to foot pounds. Ensure correct timing tensioner function.
2

Camshaft Sprocket Bolt

M8 x 1.25
Torque Value
21 ft-lbs (28 N·m)
Important Notes
Convert from inch pounds to foot pounds. Double-check camshaft timing after install.

Lubrication

Torque specifications for components related to the engine's lubrication system. Proper torque prevents oil leaks and ensures system integrity.

1

Oil Pan Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds. Tighten in a crisscross pattern.
2

Oil Drain Plug

M14 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer. Do not over tighten.
3

Oil Filter Housing Bolt

M20 x 1.5
Torque Value
0.01 ft-lbs (0.01 N·m)
Important Notes
Hand Tight. Do not over-tighten, O-ring provides seal.

Cooling

Torque specifications for components related to the engine's cooling system. Proper torque is crucial for preventing coolant leaks and ensuring correct system operation.

1

Water Pump Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds. Tighten in a crisscross pattern.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds. Ensure thermostat is properly seated.
4

Coolant Temperature Sensor

M10 x 1.5
Torque Value
13 ft-lbs (18 N·m)
Important Notes
Do not over-tighten the sensor, it is easily damaged.

Intake Exhaust

Torque specifications for components related to the engine's intake and exhaust systems. Proper torque ensures a tight seal and prevents leaks, which are critical for engine performance.

1

Intake Manifold Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds. Tighten in a crisscross pattern.
2

Intake Manifold Plenum Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds.
3

Throttle Body Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds. Check for proper throttle body seating.
4

EGR Valve Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds.

Fuel Ignition

Torque specifications for components related to the engine's fuel and ignition systems. Proper torque is crucial for proper fuel delivery, ignition performance, and preventing leaks.

1

Fuel Injector Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds. Ensure fuel injectors are correctly seated.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Convert from inch pounds to foot pounds.
3

Spark Plugs

M14 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use a spark plug socket. Do not over tighten.

Sensors

Torque specifications for critical engine sensors. Proper torque ensures correct sensor readings and prevents damage.

1

Crankshaft Position (CKP) Sensor Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Convert from inch pounds to foot pounds. Ensure proper sensor positioning.
2

Camshaft Position (CMP) Sensor Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Convert from inch pounds to foot pounds. Ensure correct sensor positioning.
3

Knock Sensor Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not over tighten, it is easily damaged.

Engine Mounts

Torque specifications for engine mount fasteners on the engine side. Critical for securing the engine to the mounts.

1

Engine Mount Bolts (Engine Side)

M10 x 1.5
Important Notes
These bolts are on the engine side of the engine mount. Ensure proper alignment.

Valve Cover

Torque specifications for valve cover bolts. Proper torque is essential for preventing oil leaks in the valve train area.

1

Valve Cover Bolts

M6 x 1.0
Torque Value
4.6 ft-lbs (6 N·m)
Important Notes
Convert from inch pounds to foot pounds. Tighten in a crisscross pattern.

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?

Using the correct torque specifications ensures proper clamping force, preventing loosening of fasteners due to vibration or thermal expansion. Under-tightening can lead to leaks and component failure, while over-tightening can damage bolts or the components they secure, including cylinder heads which can lead to expensive repairs on the 3.2L engine.

Q2

Can I use a torque wrench from a different unit of measurement?

While it is possible to convert between units such as ft-lbs, in-lbs and Nm, it is crucial to ensure that the correct final value is being used. Using conversions incorrectly can lead to incorrect torque and consequently damaged components on the 3.2L engine. It is best to use a torque wrench with the specific measurement needed.

Q3

What should I do if a bolt feels stripped or damaged?

If a bolt feels stripped while tightening, stop immediately. Continuing will likely damage threads in the engine block or component. A stripped bolt should be replaced, and the threads in the component need to be inspected and possibly repaired with a thread repair kit. Attempting to force a damaged bolt can cause further damage, especially on the aluminum engine components of the 3.2L.

Q4

Do I need to replace bolts after removing them?

While not always necessary, it is generally recommended to replace torque-to-yield (TTY) bolts, especially cylinder head bolts and some connecting rod bolts. These bolts are designed to stretch when torqued and should be replaced to ensure correct clamping force when re-installing on the 3.2L. Always refer to the service manual for specific recommendations.

Q5

What is the proper tightening sequence for bolts?

Following the correct tightening sequence, usually a criss-cross pattern working from the center outward, is crucial for evenly distributing clamping force on multi-bolt components such as intake manifolds and cylinder heads of the 3.2L engine. This prevents warping or uneven gasket compression and potential leaks. Check your specific component for the proper tightening order.

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 for tightening fasteners to specific torque values.

  • Accurate torque settings
  • Various drive sizes (3/8", 1/2", etc.)
Learn more

Socket Set

A set of sockets in various sizes to fit different bolts and nuts.

  • Metric socket sizes
  • Standard socket sizes
Learn more

Wrench Set

A set of wrenches in various sizes to assist with bolt removal.

  • Metric wrenches
  • Standard wrenches
Learn more

Extension bars

Extension bars in various sizes for tight areas

  • Various length options
  • Various drive sizes
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure

Detailed steps for properly tightening the cylinder head bolts.

  • Clean bolt threads and surfaces.
  • Install new bolts (recommended).
  • Tighten bolts in the specified sequence in stages.
  • Refer to proper torque spec.
View full procedure

Intake Manifold Bolt Tightening Procedure

Detailed steps for properly tightening the intake manifold bolts.

  • Clean bolt threads and surfaces.
  • Install new bolts (recommended).
  • Tighten bolts in the specified sequence in stages.
  • Refer to proper torque spec.
View full procedure

Exhaust Manifold Bolt Tightening Procedure

Detailed steps for properly tightening the exhaust manifold bolts.

  • Clean bolt threads and surfaces.
  • Install new bolts (recommended).
  • Tighten bolts in the specified sequence in stages.
  • Refer to proper torque spec.
View full procedure
Technical Service Bulletins

Cylinder Head Bolt Re-torque Procedure

2000-05-15

A bulletin detailing the re-torque procedure for cylinder head bolts after a specified mileage or running time.

1998-2004

Resolution: Re-torque cylinder head bolts following manufacturer's procedure.

Intake Manifold Leaking

2002-08-20

A bulletin regarding proper procedure for intake manifold installation.

2002-2004

Resolution: Inspect manifold, replace gasket and torque bolts to spec.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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