Buick Rendezvous 2002-2007 Fuel System Bolt Torque Specifications & Line Fittings
Buick Rendezvous 2002-2007

Buick Rendezvous 2002-2007 Fuel System Bolt Torque Specifications

This page provides the torque specifications for fuel system bolts on the 2002-2007 Buick Rendezvous, including fuel rail, fuel pump, and fuel line connections.

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

Fuel Pump Module

This subsystem includes components related to the fuel pump module assembly, responsible for delivering fuel from the tank to the engine.

1

Fuel Pump Module Retaining Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures the fuel pump module to the fuel tank. Ensure a secure, leak-free seal. Located on top of the fuel tank, accessed by removing the rear seats and/or access panel.
2

Fuel Pump Module Electrical Connector Mounting Screw

M4 x 0.7
Torque Value
6 in-lbs (0.9 N·m)
Important Notes
Secures the electrical connector for the fuel pump module. Prevents damage to the connector and ensures a solid electrical connection. Estimated value based on fastener size and application.

Fuel Filter

This subsystem includes components related to the fuel filter assembly, which removes contaminants from the fuel before it reaches the engine.

1

Fuel Filter Bracket Mounting Bolts (Body to Frame)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the fuel filter bracket to the vehicle frame or body. Prevents the filter from vibrating or being damaged.
2

Fuel Filter Inlet and Outlet Line Fittings

M12 x 1.5 (Banjo Bolt)
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Typically banjo bolt fittings that seal the fuel lines to the filter. Do not overtighten as it could crush the seal.

Fuel Rail

This subsystem includes the fuel rail and fuel injectors, which deliver pressurized fuel to the engine's cylinders.

1

Fuel Rail Mounting Bolts (To Intake Manifold)

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the fuel rail to the intake manifold. Prevents fuel rail leaks and ensures proper fuel delivery to the injectors. Estimated based on similar GM models.
2

Fuel Pressure Regulator Mounting Screws/Bolts (On Fuel Rail)

M5 x 0.8
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the fuel pressure regulator to the fuel rail. Do not overtighten, may damage the regulator.
3

Fuel Injector Retaining Bolts/Screws

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
These secure the injectors to the fuel rail and/or intake manifold. Critical for proper sealing. Do not overtighten. Estimated value based on similar GM models.

Intake And Throttle Body

This subsystem includes the throttle body, which controls the airflow into the engine. Proper sealing is critical for fuel delivery and performance.

1

Throttle Body Mounting Bolts/Nuts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensures that the throttle body is securely bolted to the intake manifold. Use a criss-cross pattern when tightening to ensure even pressure.

Fuel Tank

This subsystem includes components related to the fuel tank, filler neck, and tank straps.

1

Fuel Tank Straps Mounting Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the fuel tank to the vehicle undercarriage. Critical torque value, ensuring the tank does not come loose. Safety critical. Estimated based on similar sized body mounting hardware.
2

Fuel Filler Neck Mounting Bolts

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Fastens the filler neck to the vehicle body and/or fuel tank. Ensures a secure, leak-free seal. Estimated based on similar body hardware.

Evaporative Emissions

This subsystem includes components related to the evaporative emissions system, which captures and stores fuel vapors.

1

EVAP Canister Mounting Bolts/Screws

M6 x 1.0
Torque Value
6 ft-lbs (8 N·m)
Important Notes
Secures the EVAP canister to the vehicle body. Prevents damage or excessive vibration. Estimated based on general chassis mounted components on similar models.
2

EVAP Lines to Canister/Fuel Tank Fittings

M8 x 1.25
Torque Value
8 ft-lbs (12 N·m)
Important Notes
Secures lines which carry fuel vapor to the EVAP system. Preventing leaks in this system can improve overall performance and ensure the system is working correctly. Estimated based on application.

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 using the correct torque specification so important for fuel system bolts?

Using the correct torque specification for fuel system bolts is crucial to ensure a leak-free and safe fuel system. Over-tightening can damage threads, deform components like fuel rails or injectors, and cause leaks. Under-tightening can lead to fuel leaks and potential fire hazards due to loosened connections. Precise torque settings ensure the sealing surfaces are properly compressed without overstressing the components.

Q2

What happens if I over-tighten a fuel line fitting?

Over-tightening a fuel line fitting, such as on the fuel rail or fuel pump module, can severely damage the fitting and the mating component. This can strip the threads, causing a fuel leak. In some cases, the fitting can crack or deform, leading to a potentially dangerous fuel leak, and require costly replacements of the fuel line or fuel rail.

Q3

Do torque specifications vary for different materials in the fuel system?

Yes, torque specifications can vary based on the materials being joined. For instance, plastic fuel rail components will have lower torque specs than connections involving steel fittings. Always refer to the specific torque specification for the specific connection being made and check if manufacturer has given torque in a specific bolt sequence.

Q4

Should I use thread sealant on fuel system bolts?

Thread sealant, or threadlocker, is generally NOT used on fuel system bolt threads. The sealing is achieved through precise torque and often an o-ring or gasket. Applying thread sealant can cause improper readings for torque specifications and can lead to contamination of the fuel system if the sealant is not fuel resistant or breaks down. Consult a service manual if there is a specific reason to use a sealant.

Q5

Do I need to replace fuel system bolts every time they're loosened?

Generally, you do not need to replace fuel system bolts every time they're loosened unless they're designed as torque-to-yield (TTY) bolts (which are uncommon for fuel lines). However, it’s recommended to inspect them for damage like stretching, stripped threads, or corrosion. Always replace bolts that appear damaged. Always refer to the service manual for specific guidelines. Always clean threads before re-installing.

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 (ft-lbs)

A calibrated torque wrench to accurately tighten fasteners to specified torque values.

  • Foot-pound scale
  • Click-type mechanism for precise torque application
Learn more

Torque Wrench (in-lbs)

A calibrated torque wrench to accurately tighten fasteners to specified torque values in inch pounds.

  • Inch-pound scale
  • Click-type mechanism for precise torque application
Learn more

Socket Set

A set of sockets in various sizes to fit the fuel system fasteners.

  • Metric sizes
  • 6-point and/or 12-point options
Learn more

Wrench Set

A set of wrenches to assist in holding or applying torque to fasteners.

  • Metric sizes
  • Open-ended and/or box-end options
Learn more
Service Procedures

Fuel Rail Installation and Torque Procedure

Procedure for installing and torquing fuel rail bolts on a 2002-2007 Buick Rendezvous.

  • Ensure the fuel rail and mating surfaces are clean and free of debris.
  • Position the fuel rail onto the intake manifold.
  • Install the fuel rail bolts by hand, ensuring they are aligned properly.
  • Using a torque wrench set to 18 ft-lbs (24 Nm), gradually tighten the fuel rail bolts in a crisscross pattern to ensure even pressure.
  • Recheck torque, confirming that all bolts are at 18 ft-lbs (24 Nm).
  • Reconnect any fuel lines or electrical connectors disconnected during the process.
View full procedure

Fuel Injector Retaining Bolt Torque Procedure

Procedure for torquing fuel injector retaining bolts on a 2002-2007 Buick Rendezvous.

  • Install fuel injector into the rail or intake manifold.
  • Install the fuel injector retaining bolts by hand, ensuring they are aligned properly.
  • Using a torque wrench set to 89 in-lbs (10 Nm), gradually tighten the fuel injector retaining bolts.
  • Recheck torque, confirming that all bolts are at 89 in-lbs (10 Nm).
View full procedure

Fuel Line Fitting Torque Procedure

Procedure for torquing fuel line fittings on a 2002-2007 Buick Rendezvous.

  • Ensure that the fuel line fittings and mating surfaces are clean and free of debris.
  • Align the fuel line fittings and begin tightening by hand.
  • Using a torque wrench set to 22 ft-lbs (30 Nm), gradually tighten the fuel line fitting.
  • Recheck torque, confirming that all fittings are at 22 ft-lbs (30 Nm).
View full procedure
Technical Service Bulletins

Fuel Rail Bolt Corrosion and Torque Issues

2005-06-15

Some 2002-2007 Buick Rendezvous models may experience fuel rail bolt corrosion, potentially affecting proper torque application. Improper torque can lead to fuel leaks and engine performance issues.

2002-2007

Resolution: Inspect fuel rail bolts for corrosion before torque application. Replace corroded bolts. Always use a calibrated torque wrench to ensure correct tightness.

Fuel Injector Retaining Bolt Breakage

2004-11-20

Reports indicate fuel injector retaining bolt breakage or stripping due to over tightening, potentially leading to fuel leaks or poor injector seating.

2002-2005

Resolution: Always adhere to the specified torque of 89 in-lbs (10 Nm). Avoid excessive force when tightening. Inspect bolts for damage before reuse. Replace damaged bolts.

Fuel Line Connection Leaks After Service

2006-03-01

Instances of fuel leaks at connection points after fuel system maintenance have been reported, frequently caused by insufficient torque or damaged fittings. Ensure proper torque specification is used.

2003-2007

Resolution: Verify the integrity of the fuel line fittings. Replace damaged fittings. Apply specified 22 ft-lbs (30 Nm) torque. Perform leak checks following installation.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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