Chrysler Voyager 2020-present 3.6L Engine Bolt Torque Specifications & Fastener Values
Chrysler Voyager 2020-present

Chrysler Voyager 2020-present 3.6L Engine Bolt Torque Specifications

Detailed torque specifications for bolts used in the 3.6L Pentastar V6 engine found in the 2020-Present Chrysler Voyager minivan. Includes values for critical 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 bolts securing the cylinder head to the engine block. Proper tightening is critical for maintaining combustion seal and preventing leaks.

1

Cylinder Head Bolts

M12 x 1.75
Important Notes
Torque to initial value, then tighten the bolts an additional 90 degrees using a torque angle meter, following a specific tightening sequence. These are Torque-to-Yield (TTY) bolts and should be replaced when removed.

Engine Block

Torque specifications for fasteners related to the engine block, including main bearings, oil pan, and related components.

1

Main Bearing Bolts

M12 x 1.5
Important Notes
Torque bolts to initial spec, then final spec in proper sequence. Follow the manufacturer's recommended sequence when tightening.
2

Oil Pan Bolts

M6 x 1.0
Torque Value
13 ft-lbs (17 N·m)
Important Notes
Tighten evenly in a criss-cross pattern to avoid leaks. Do not overtighten.

Rotating Assembly

Torque specifications for fasteners related to the crankshaft, connecting rods, and flywheel/flexplate.

1

Connecting Rod Nuts

M9 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Tighten to specified torque. Ensure proper bearing cap alignment.
2

Flywheel Bolts

M10 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Tighten evenly in a star pattern. Use new bolts when installing the flywheel.

Valve Train

Torque specifications for components related to the valve train, including valve covers, rocker arms, and camshaft sprockets.

1

Valve Cover Bolts

M6 x 1.0
Torque Value
3.75 ft-lbs (5 N·m)
Important Notes
Tighten evenly to avoid damaging the valve cover. Be sure to install new gaskets.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Ensure the camshaft is properly aligned before tightening to prevent incorrect valve timing. Use new bolts.
3

Rocker Arm/Shaft Bolts

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Tighten bolts evenly, following the manufacturer's sequence.

Timing System

Torque specifications for components related to the engine timing, including tensioners.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Ensure proper tensioner operation before tightening.

Intake System

Torque specifications for fasteners in the engine's intake system, including the throttle body and intake manifold.

1

Throttle Body Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten evenly in a criss-cross pattern to avoid air leaks. Use new gasket.
2

Intake Manifold Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten in a criss-cross pattern from the center out. Use a new intake gasket.
3

Fuel Injector Bolts

M6 x 1.0
Torque Value
17 ft-lbs (23 N·m)
Important Notes
Tighten evenly and do not overtighten. Use new o-rings on the injectors.
4

Fuel Injector Rail Bolts

M6 x 1.0
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Tighten evenly to avoid leaks. Do not overtighten.

Exhaust System

Torque specifications for fasteners related to the exhaust system, including manifolds and EGR valves.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Tighten evenly in a criss-cross pattern starting from the center. Use new gasket.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Tighten evenly. These bolts often connect secondary support points.
3

EGR Valve Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly to ensure proper sealing. Use new gasket.

Cooling System

Torque specifications for fasteners related to the cooling system, including the water pump and thermostat housing.

1

Water Pump Bolts

M8 x 1.25
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Tighten evenly to prevent leaks. Use a new gasket.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Tighten evenly to prevent pulley slippage. Do not overtighten.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly to prevent coolant leaks. Do not overtighten to avoid cracking the housing. Use new gasket.
4

Coolant Temperature Sensor Bolt

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Sensor must be properly tightened for accuracy and to maintain proper contact. Do not overtighten.

Accessory Drive

Torque specifications for fasteners related to the accessory drive system, including tensioners and pulleys.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Ensure tensioner is properly aligned and engaged before tightening.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Ensure the idler pulley is properly aligned. Do not overtighten.

Sensors

Torque specifications for various sensors on the engine.

1

Knock Sensor Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure proper contact with the engine block. Do not overtighten to avoid damaging the sensor.
2

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Value
5.8 ft-lbs (8 N·m)
Important Notes
Ensure sensor is properly aligned and making contact. Do not overtighten.
3

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Value
5.8 ft-lbs (8 N·m)
Important Notes
Ensure sensor is properly aligned and making contact. Do not overtighten.
4

Intake Air Temperature Sensor Bolt

M6 x 1.0
Torque Value
5.8 ft-lbs (8 N·m)
Important Notes
Ensure proper contact with mounting surface. Do not overtighten.

Ignition System

Torque specifications for the ignition coils.

1

Ignition Coil Bolt

M6 x 1.0
Torque Value
5.8 ft-lbs (8 N·m)
Important Notes
Tighten to specified torque to maintain proper electrical grounding and prevent vibration.

Other

Torque specifications for various other components.

1

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
130 ft-lbs (176 N·m)
Important Notes
Use a new bolt. Ensure proper alignment before tightening.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use a new sealing washer. Do not overtighten to avoid damaging threads.
3

Spark Plugs

M14 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Torque is crucial for proper sealing and heat transfer. Do not overtighten.
4

Oil Filter Housing

Spin-on style
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Hand tighten until the seal makes contact with the mating surface, then turn an additional 3/4 of a turn. Check filter housing for leaks after installation.

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 it important to use the correct torque specifications?

Using the correct torque specifications is crucial for proper component function and longevity. Under-torquing can lead to leaks, vibrations, and loosening of bolts, while over-torquing can cause damage to threads, bolts, and the components themselves. This can lead to engine failure, coolant leaks, oil leaks, and other serious problems. For example, an over-torqued intake manifold bolt could crack the manifold, causing a vacuum leak and poor engine performance.

Q2

What type of torque wrench should I use?

A calibrated torque wrench is essential. For the 3.6L engine, both click-type and digital torque wrenches are acceptable, but you should ensure they are within their calibration period. Use a wrench with an appropriate torque range for the bolts you are tightening. For example, smaller bolts for sensors may require inch-pounds, while larger bolts like those for the cylinder head require foot-pounds.

Q3

What does 'lubricate threads' mean?

When torque specifications state to 'lubricate threads', this means applying a thin layer of oil (such as engine oil) or anti-seize compound to the threads of the bolt or stud. This reduces friction when tightening and provides more consistent and accurate torque readings. Lubricating reduces binding on threads. When doing this, you must follow the specified torque setting as lubricating threads changes the force required to tighten. Failure to lubricate or doing so incorrectly can cause improper torque application. For example, using too much anti-seize can lead to over-torqued fasteners, and can damage components.

Q4

How often should I check the torque on these bolts?

Generally, the bolts on the 3.6L engine should be torqued to specification during any repair or maintenance procedure that involves their removal. Regular checks are not required unless there are suspected issues like leaks or noise. However, it's a good practice to re-check the torque on newly assembled components after a short drive cycle (e.g., 50-100 miles) as bolts can sometimes settle. For example, after replacing the thermostat housing, re-check the bolts after a few drives.

Q5

Are torque-to-yield bolts reusable?

No, torque-to-yield (TTY) bolts are designed for single use. They stretch when tightened to the specified torque, and cannot be reused because their mechanical properties have been altered. Always replace TTY bolts, for example cylinder head bolts, with new ones. Attempting to reuse TTY bolts will result in improper clamping force.

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 achieving accurate bolt torque specifications, ensuring proper engine assembly and preventing damage.

  • 1/2" drive size
  • Wide torque range (e.g., 20-150 ft-lbs)
  • Click-type mechanism for accurate torque application
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for smaller fasteners on the 3.6L engine.

  • 3/8" drive size
  • Lower torque range (e.g., 5-80 ft-lbs)
  • Click-type mechanism for accurate torque application
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is required to fit various bolts and fasteners on the engine.

  • Various sizes ranging from 8mm to 19mm
  • 6-point design for improved grip
  • Durable construction
Learn more

Extension Bars

Extension bars allow access to hard-to-reach bolts.

  • Various lengths
  • Durable construction
Learn more

Universal Joint

A universal joint will allow you to torque bolts at an angle when clearance is an issue.

  • 1/2" or 3/8" drive sizes
  • Durable construction
Learn more

Engine Service Manual

A service manual provides torque specs and procedures specific to the vehicle and engine.

  • Comprehensive torque specifications
  • Detailed diagrams
  • Step-by-step procedures
Learn more
Service Procedures

Cylinder Head Bolt Tightening

Proper cylinder head bolt tightening is crucial for engine sealing and performance. It requires specific sequence and torque values.

  • Clean all bolt threads and the head surface.
  • Lightly oil the bolt threads.
  • Install all bolts finger tight.
  • Torque all bolts in sequence to 45 ft-lbs.
  • Torque all bolts in sequence an additional 90 degrees.
  • Torque all bolts in sequence an additional 90 degrees.
View full procedure

Intake Manifold Bolt Tightening

The intake manifold bolts need to be torqued properly to avoid vacuum leaks and ensure correct operation.

  • Install all manifold bolts.
  • Torque the manifold bolts in a criss-cross pattern to 80 in-lbs
  • Torque the manifold bolts in a criss-cross pattern to 105 in-lbs.
View full procedure

Oil Pan Bolt Tightening

Tightening the oil pan bolts properly ensures a leak free seal.

  • Install all oil pan bolts.
  • Torque the bolts in a criss-cross pattern to 105 in-lbs.
View full procedure

Connecting Rod Cap Bolt Tightening

Connecting rod bolts must be tightened with proper torque and angle to ensure proper operation and prevent bearing damage

  • Install connecting rod cap and bolts.
  • Torque the bolts in sequence to 20 ft-lbs.
  • Torque the bolts an additional 90 degrees.
View full procedure
Technical Service Bulletins

Engine Oil Leak from Oil Pan

2022-05-15

Some 2020-2022 Voyager models with the 3.6L engine may experience oil leaks from the oil pan due to insufficient bolt torque at the factory.

2020-2022

Resolution: Re-torque the oil pan bolts to 105 in-lbs following a criss-cross pattern and inspect for leaks.

Cylinder Head Bolt Retorque Procedure

2023-01-10

A technical bulletin was released stating a new procedure for cylinder head bolt tightening to eliminate failures.

2020-2023

Resolution: Tighten the cylinder head bolts to 45 ft-lbs, 90 degrees and an additional 90 degrees following the correct sequence.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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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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