Chrysler Concorde 1993-1997 3.5L Engine Bolt Torque Specifications & Fastener Values
Chrysler Concorde 1993-1997

Chrysler Concorde 1993-1997 3.5L Engine Bolt Torque Specifications

Detailed torque specifications for various bolts on the 3.5L engine of the 1993-1997 Chrysler Concorde, including cylinder head bolts, intake manifold bolts, exhaust manifold bolts, and more.

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

Bolts and fasteners related to securing the cylinder head to the engine block. Proper torque is crucial for maintaining compression and preventing leaks.

1

Cylinder Head Bolts

M12 x 1.75
Important Notes
Torque in sequence, multiple passes required. Final torque may require an angle step based on manufacturer's specifications. Consult specific service manual for angle torque.
2

Camshaft Bearing Cap Bolts

M8 x 1.25
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Torque in sequence to ensure even pressure on the camshaft. Estimated value based on similar component bolt sizes.

Engine Block

Fasteners related to the engine block, ensuring the integrity and proper functioning of critical components within the engine.

1

Main Bearing Bolts

M12 x 1.75
Important Notes
Torque in sequence, multiple passes required. Main bearing bolts are critical to the crankshaft function.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Proper torque ensures secure bearing fit. Estimate is based on common sizes.
3

Oil Pan Bolts

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Torque evenly to prevent leaks. Inch-lbs converted to ft-lbs. Estimated based on similar components.
4

Timing Cover Bolts

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Torque evenly to ensure proper sealing. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.

Rotating Assembly

Bolts and fasteners related to components that rotate with the engine, critical for smooth and balanced operation.

1

Flywheel Bolts

M10 x 1.5
Torque Value
73 ft-lbs (99 N·m)
Important Notes
Torque in sequence, multiple passes may be required. Estimated value based on similar component bolt sizes.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Value
110 ft-lbs (149 N·m)
Important Notes
Tighten securely to prevent vibrations. Estimated value based on similar component bolt sizes.
3

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
42 ft-lbs (57 N·m)
Important Notes
Proper torque to prevent slipping. Estimated value based on similar component bolt sizes.

Valve Train

Fasteners associated with the valve train, ensuring proper valve actuation and engine performance.

1

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Torque evenly to ensure proper operation. Estimated value based on similar component bolt sizes.

Timing System

Fasteners crucial for the correct timing of the engine, ensuring proper valve and piston synchronization.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Maintain proper belt/chain tension. Estimated value based on similar component bolt sizes.

Intake System

Fasteners securing components of the intake system, critical for proper air and fuel mixture.

1

Intake Manifold Bolts

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Torque in a cross pattern. Inch-lbs converted to ft-lbs. Estimated value based on similar components.
2

Throttle Body Bolts

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten securely to prevent air leaks. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.
3

EGR Valve Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure proper sealing. Estimated value based on similar component bolt sizes.
4

Fuel Rail Bolts

M6 x 1
Torque Value
10 ft-lbs (13 N·m)
Important Notes
Torque evenly to ensure proper seating and sealing of the rail. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.

Exhaust System

Fasteners for the exhaust system, ensuring proper sealing and preventing leaks.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Torque in sequence to prevent leaks. Estimated value based on similar component bolt sizes.

Fuel System

Fasteners related to the fuel delivery system ensuring proper operation and preventing leaks.

1

Fuel Injector Bolts

M6 x 1
Torque Value
10 ft-lbs (13 N·m)
Important Notes
Torque evenly to ensure proper seating. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.

Ignition System

Fasteners associated with the ignition system components, ensuring proper spark and combustion.

1

Spark Plugs

M14 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Proper torque ensures good seal and heat transfer. Estimated value based on similar component bolt sizes.
2

Ignition Coil Bolt

M6 x 1
Torque Value
10 ft-lbs (13 N·m)
Important Notes
Securely mounts the coil. Inch-lbs converted to ft-lbs. Estimated value based on similar components.

Cooling System

Fasteners related to the cooling system, ensuring proper coolant circulation and engine temperature regulation.

1

Water Pump Bolts

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Torque evenly to prevent coolant leaks. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.
2

Water Pump Pulley Bolts

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Torque evenly to secure the pulley. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.
3

Thermostat Housing Bolts

M6 x 1
Torque Value
10 ft-lbs (13 N·m)
Important Notes
Torque evenly to ensure a leak-free seal. Inch-lbs converted to ft-lbs. Estimated value based on similar components.
4

Coolant Temperature Sensor Bolt

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Snug fit to ensure a good seal. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.

Lubrication System

Fasteners related to the lubrication system ensuring proper oil circulation and engine protection.

1

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Proper torque ensures a leak-free seal. Estimated value based on similar component bolt sizes.
2

Oil Filter Housing Bolt

N/A
Torque Value
5 ft-lbs (7 N·m)
Important Notes
Hand tight and use new gasket, torque spec is estimated.

Accessory Drive

Fasteners related to the accessory drive system, ensuring proper belt tension and reliable operation of driven components.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Securely mounts the tensioner. Estimated value based on similar component bolt sizes.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Securely mounts the idler pulley. Estimated value based on similar component bolt sizes.

Sensors

Fasteners for various engine sensors, ensuring proper functionality and accurate readings.

1

Knock Sensor Bolt

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Proper torque ensures the sensor can function properly. Estimated value based on similar components.
2

Crankshaft Position Sensor Bolt

M6 x 1
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Proper torque ensures sensor accuracy. Inch-lbs converted to ft-lbs. Estimated value based on similar component bolt sizes.

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 proper torque specifications important for my 3.5L engine?

Using the correct torque prevents damage to engine components, ensures proper sealing, and avoids issues like leaks, component failure, and even engine damage. Over-tightening can strip threads, while under-tightening can cause leaks and component loosening.

Q2

What type of torque wrench should I use for these specifications?

A click-type torque wrench is generally recommended for its accuracy and ease of use. Ensure your torque wrench is calibrated and within its operational range for the specified torques. For lower torque values, an inch-pound wrench is preferable.

Q3

Do I need to use new bolts when reassembling my 3.5L engine?

It's generally good practice to replace bolts, especially torque-to-yield (TTY) bolts, which are often used in engine applications. These bolts stretch when tightened and may not maintain proper clamping force when reused. Check the service manual for your specific application for bolt replacement recommendations.

Q4

What if I don't have a torque wrench?

Using a torque wrench is crucial for proper bolt tightening. Attempting to use feel or other methods is highly unreliable and can result in damage or improper engine operation. If you don't have one, consider renting or purchasing one before undertaking engine work. You might also consider taking your vehicle to a qualified mechanic to ensure proper procedure is followed if you do not have access to tools or knowledge.

Q5

What does 'lubricate threads' mean when tightening a bolt?

Lubricating threads, usually with a light oil, ensures smooth tightening and accurate torque application. Dry threads create higher friction, resulting in inconsistent torque readings and potential errors. Using the correct lubricant as specified by the service manual is critical for proper readings and preventing damage.

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 accurately tightening bolts to specification.

  • Wide torque range (typically 20-250 ft-lbs)
  • Click-type or digital readout
  • Accurate and reliable
Learn more

Torque Wrench (3/8" drive)

A smaller torque wrench for lower torque fasteners.

  • Lower torque range (typically 5-80 ft-lbs)
  • Click-type or digital readout
  • Accurate and reliable
Learn more

Socket Set (Standard and Metric)

A comprehensive set of sockets to fit various bolt and nut sizes.

  • 1/2" and 3/8" drive sizes
  • Standard and Metric sizes included
  • 6-point and 12-point options
Learn more

Wrench Set (Standard and Metric)

Combination wrenches for holding nuts while tightening bolts.

  • Standard and Metric sizes included
  • Box end and open end options
  • Various sizes
Learn more

Extension bars

Extension bars to reach difficult to access fasteners.

  • Various lengths
  • 1/2" and 3/8" drive sizes
Learn more

Universal Joints

Universal joints to use with sockets to get around obsticles.

  • 1/2" and 3/8" drive sizes
  • Durable construction
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Steps to properly torque cylinder head bolts.

  • Apply clean engine oil to the bolt threads and under the bolt heads.
  • Install cylinder head bolts in the specified sequence.
  • Torque all bolts to the first torque specification.
  • Torque all bolts to the second torque specification.
  • Perform the final angle torque pass.
View full procedure

Intake Manifold Bolt Torque Procedure

Steps to properly torque intake manifold bolts.

  • Install intake manifold and evenly thread all fasteners by hand.
  • Torque intake manifold bolts to the specified torque using a criss-cross sequence starting from the center working outward.
  • Re-check torque
View full procedure

Exhaust Manifold Bolt Torque Procedure

Steps to properly torque exhaust manifold bolts.

  • Install exhaust manifold and evenly thread all fasteners by hand.
  • Torque exhaust manifold bolts to the specified torque using a criss-cross sequence starting from the center working outward.
  • Re-check torque
View full procedure

Main Bearing Cap Bolt Torque Procedure

Steps to properly torque main bearing cap bolts.

  • Apply clean engine oil to the bolt threads and under the bolt heads.
  • Install main bearing cap bolts in the specified sequence.
  • Torque all bolts to the first torque specification.
  • Torque all bolts to the second torque specification.
View full procedure

Connecting Rod Bolt Torque Procedure

Steps to properly torque connecting rod bolts.

  • Apply clean engine oil to the bolt threads and under the bolt heads.
  • Install connecting rod cap bolts in the specified sequence.
  • Torque all bolts to the first torque specification.
  • Torque all bolts to the second torque specification.
  • Perform the final angle torque pass.
View full procedure
Technical Service Bulletins

Cylinder Head Bolt Retorque Recommendation

1995-06-15

A recommendation regarding retorquing cylinder head bolts after initial installation.

1993-1997

Resolution: Retorque cylinder head bolts after engine reaches operating temperature.

About the Author

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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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