Chrysler Concorde 1993-1997 3.3L Engine Bolt Torque Specifications & Fastener Values
Chrysler Concorde 1993-1997

Chrysler Concorde 1993-1997 3.3L Engine Bolt Torque Specifications

This page provides a comprehensive list of bolt torque specifications for the 3.3L engine used in the 1993-1997 Chrysler Concorde. Includes specifications for cylinder head bolts, intake manifold bolts, exhaust manifold bolts, and other 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

Torque specifications for the cylinder head and related components, ensuring proper sealing and combustion chamber integrity.

1

Cylinder Head Bolts

M12 x 1.75
Torque Value
22.5 ft-lbs (30.5 N·m)
Important Notes
Tighten bolts in the correct sequence as specified in the service manual. Multiple passes may be required.
2

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
22.5 ft-lbs (30.5 N·m)
Important Notes
Ensure proper seating of rocker arm assembly before tightening.
3

Valve Cover Bolts

M6 x 1.0
Torque Value
4.6 ft-lbs (6.2 N·m)
Important Notes
Use a new gasket to ensure proper sealing. Do not overtighten.
4

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Value
30 ft-lbs (40.5 N·m)
Important Notes
Tighten bolts evenly to avoid leaks. Use new gasket.

Engine Block

Torque specifications for engine block components including main bearings and connecting rods.

1

Main Bearing Bolts

M12 x 1.75
Torque Value
105 ft-lbs (142 N·m)
Important Notes
Tighten in the correct sequence and in stages as specified in service manual.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
47.5 ft-lbs (64.5 N·m)
Important Notes
Tighten evenly to ensure correct bearing crush.
3

Oil Pan Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Use a new gasket to ensure proper sealing. Do not overtighten.
4

Oil Drain Plug

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

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
3 ft-lbs (4 N·m)
Important Notes
Tighten by hand until snug. Do not overtighten.
6

Water Pump Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Use new gasket.

Crankshaft And Flywheel

Torque specifications for crankshaft, flywheel and related components.

1

Flywheel Bolts

M10 x 1.5
Torque Value
72.5 ft-lbs (98.5 N·m)
Important Notes
Tighten bolts in the correct sequence.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
110 ft-lbs (149 N·m)
Important Notes
Proper tightening is crucial for vibration dampening.

Timing System

Torque specifications for timing belt/chain related components, ensuring proper valve timing.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
22.5 ft-lbs (30.5 N·m)
Important Notes
Ensure proper tension is applied before final tightening.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
42.5 ft-lbs (57.5 N·m)
Important Notes
Ensure proper alignment and torque during install.

Intake And Fuel System

Torque specifications for intake, fuel delivery, and related components.

1

Intake Manifold Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Tighten bolts in the correct sequence to prevent leaks. Use new gaskets.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Do not overtighten, use a new gasket for a proper seal.
3

EGR Valve Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20.5 N·m)
Important Notes
Ensure proper seating and use new gaskets.
4

Fuel Rail Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Ensure proper seating and correct torque for safety.
5

Fuel Injector Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Ensure proper seating to prevent leaks.

Ignition System

Torque specifications for ignition components, ensuring good grounding and operation.

1

Ignition Coil Bolt

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Ensure proper alignment and seating for secure electrical connection.
2

Spark Plugs

M14 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Use a spark plug socket to install plugs, tighten to proper torque.

Cooling System

Torque specifications for cooling system components, ensuring proper sealing and coolant circulation.

1

Thermostat Housing Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Use a new gasket to ensure proper seal. Do not overtighten.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
10 ft-lbs (13.5 N·m)
Important Notes
Ensure proper seating of the pulley.

Accessory Drive

Torque specifications for accessory drive components, ensuring correct belt tension.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
35 ft-lbs (47.5 N·m)
Important Notes
Ensure proper belt tension is achieved before final tightening.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
35 ft-lbs (47.5 N·m)
Important Notes
Ensure proper alignment of the pulley.

Sensors

Torque specifications for engine sensors, ensuring proper readings and operation.

1

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Value
6.6 ft-lbs (9 N·m)
Important Notes
Ensure proper seating and accurate positioning.
2

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Value
6.6 ft-lbs (9 N·m)
Important Notes
Ensure proper seating and accurate positioning.
3

Knock Sensor Bolt

M8 x 1.25
Torque Value
13 ft-lbs (17.5 N·m)
Important Notes
Tighten to ensure proper sensor contact and operation.
4

Coolant Temperature Sensor

M10 x 1.5
Torque Value
13 ft-lbs (17.5 N·m)
Important Notes
Use thread sealant and torque correctly for accurate temperature readings.
5

Intake Air Temperature Sensor

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten, ensure secure mounting for proper readings.

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 happens if I over-torque a bolt?

Over-torquing a bolt, especially in aluminum engine components, can stretch or break the bolt, strip the threads in the block or head, or crush the gasket. This can lead to oil leaks, coolant leaks, and even engine failure. For example, over-torquing the intake manifold bolts can lead to vacuum leaks and an unstable engine idle.

Q2

Can I use threadlocker on these bolts?

Generally, threadlocker is not required for most 3.3L engine bolts unless specifically stated in the service manual. However, applying a small amount of medium-strength threadlocker (such as Loctite 242) on fasteners that may loosen due to vibration, like those on the exhaust manifolds or accessory brackets, can be a good preventative measure. Avoid using high-strength threadlocker on engine bolts as it may make disassembly difficult. Always consult the repair manual for specific recommendations.

Q3

Do I need to use new bolts each time I remove them?

While not always necessary, it's recommended to replace torque-to-yield bolts or fasteners that are stretched on a 3.3L engine. Bolts like those on the cylinder head or connecting rods are often torque-to-yield and should be replaced each time they are removed. Check the service manual to verify which bolts should be replaced. Reusing old stretched bolts can lead to improper clamping force and potential failure.

Q4

Should I lubricate the bolt threads before torquing?

Yes, unless specifically instructed otherwise in the service manual, lightly lubricating the bolt threads with engine oil or anti-seize is recommended. This will ensure proper torque readings and prevent galling. However, excessive lubrication can lead to over-torquing as it reduces friction and the applied torque will not match the designed clamping force. Follow the recommendations provided in the repair manual for the engine component you are working on.

Q5

What is the proper torquing sequence?

The torquing sequence is crucial for evenly distributing pressure and preventing distortion of components, especially with cylinder heads and intake manifolds. Always follow the specified sequence outlined in the repair manual for the 3.3L engine. For instance, cylinder head bolts are typically tightened in a three-step sequence, starting from the center and working outwards in a spiral pattern.

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 (1/2" Drive)

A calibrated torque wrench is essential for tightening bolts to the correct specification.

  • Measures torque in foot-pounds (ft-lbs) or Newton-meters (Nm)
  • Ratchet mechanism for easy use
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is needed to fit various bolt heads on the 3.3L engine.

  • Variety of sizes for different bolts
  • Includes common sizes for engine components
Learn more

Extensions

Socket extensions provide extra reach for accessing recessed or hard-to-reach bolts.

  • Varying lengths to suit different applications
  • Help reach bolts in tight spaces
Learn more

Swivel joint

A swivel joint allows you to torque at an angle, this can help get a socket where a normal extention cant reach.

  • Allows for an angle to the socket.
  • Helps access bolts at an angle.
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Step-by-step procedure for tightening cylinder head bolts on the 3.3L engine.

  • Clean the bolt threads and cylinder head bolt holes.
  • Install new cylinder head bolts.
  • Tighten all bolts to 30 ft-lbs in the correct sequence.
  • Tighten all bolts an additional 90 degrees in the correct sequence.
  • Tighten all bolts an additional 90 degrees in the correct sequence.
View full procedure

Intake Manifold Bolt Torque Procedure

Procedure for correctly tightening the bolts holding the intake manifold in place.

  • Clean the bolt threads and manifold mounting surfaces.
  • Install the intake manifold with new gasket.
  • Tighten bolts to 15 ft-lbs in correct sequence.
  • Tighten to 20 ft-lbs in correct sequence
View full procedure

Exhaust Manifold Bolt Torque Procedure

Procedure for torquing exhaust manifold bolts.

  • Clean the bolt threads and mounting surfaces.
  • Install new exhaust manifold gasket
  • Tighten bolts to 20 ft-lbs in correct sequence
View full procedure

Rocker arm shaft bolts

procedure for tightening rocker arm shaft bolts

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

Cylinder Head Bolt Re-Torque Recommendation

1995-04-15

Some early 3.3L engines may experience head gasket leaks due to inadequate bolt torque. Recommend following updated torque procedure.

1993-1995

Resolution: Replace head bolts. Follow updated torque procedure using a torque angle meter.

Updated Intake Manifold Torque Spec

1996-08-20

A change in intake manifold design requires a slightly higher torque spec to prevent vacuum leaks.

1996-1997

Resolution: Tighten intake manifold bolts to 20 ft-lbs.

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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Technical Information
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