Acura TSX 2009-2014 Fuel System Bolt Torque Specifications & Line Fittings
Acura TSX 2009-2014

Acura TSX 2009-2014 Fuel System Bolt Torque Specifications

Detailed torque specifications for fuel system bolts on the 2009-2014 Acura TSX, including fuel pump, fuel rail, and related 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

Fuel System Fuel Rail

Torque specifications for the fuel rail and related components.

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure even tightening. Use a criss-cross pattern when tightening multiple bolts.
2

Fuel Injector Mounting Bolts/Screws

M5 x 0.8
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten evenly to avoid damage to the injector. These may be small screws.
3

Fuel Line Banjo Bolt (at Fuel Rail)

M12 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use a new crush washer. This value is an estimate. Torque may vary based on bolt size. A 10mm bolt should have approximately 15 ft-lbs (20 Nm), while a 14mm bolt can have as much as 20-22 ft-lbs (27-30 Nm).
4

Fuel Pressure Regulator Mounting Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
If regulator is integrated with fuel rail, use fuel rail torque specifications. Estimated value based on similar fasteners.

Fuel System Fuel Pump

Torque specifications for the fuel pump and related components.

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (12 N·m)
Important Notes
Ensure even tightening around the flange. Use a criss-cross pattern.
2

Fuel Line Fitting Nut (at Fuel Pump/Tank)

Fitting specific - estimated
Torque Value
15 ft-lbs (20 N·m)
Important Notes
This is an estimated value; actual torque depends on the fitting type and size. Use new O-rings or seals.

Fuel System Fuel Tank

Torque specifications for the fuel tank and related components.

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Ensure straps are properly aligned before tightening.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (12 N·m)
Important Notes
Ensure proper alignment of the filler neck to the tank and body.

Fuel System Fuel Filter

Torque specifications for the fuel filter and related components.

1

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure proper seating of the filter and use new sealing elements.
2

Fuel Line Banjo Bolt (at Fuel Filter)

M10 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Use a new crush washer. This value is an estimate. Torque may vary based on bolt size. A 12mm bolt should have approximately 18 ft-lbs (24 Nm), while a 14mm bolt can have as much as 20-22 ft-lbs (27-30 Nm).
3

Fuel Line Fitting Nut (at Fuel Filter)

Fitting specific - estimated
Torque Value
14 ft-lbs (19 N·m)
Important Notes
This is an estimated value; actual torque depends on the fitting type and size. Use new O-rings or seals.

Fuel System Evaporative Emissions

Torque specifications for evaporative emissions components.

1

Fuel Vapor Canister Mounting Bolts

M6 x 1.0
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Torque value may vary based on location and fastener type.

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 accurate torque specifications important for fuel system bolts?

Accurate torque is crucial to prevent fuel leaks. Under-torquing can lead to loose connections and leaks, while over-torquing can damage threads, crush gaskets, or even crack fuel components like the fuel pump housing or fuel rail. A leak could cause a fire hazard, and component damage can cause fuel delivery problems or even disable the vehicle.

Q2

What happens if I over-tighten a fuel bolt?

Over-tightening a fuel bolt can cause a range of problems, including stripping threads in the component or the engine block, damaging sealing washers or gaskets, or even causing the fuel component (e.g., fuel pump, fuel rail) to crack. This could lead to fuel leaks and component failure. For example, over-torquing a fuel pump retaining bolt might crack the pump housing, requiring replacement.

Q3

What happens if I under-tighten a fuel bolt?

Under-tightening fuel bolts can lead to fuel leaks due to a poor seal. These leaks can be small drips initially, but they can become significant over time, causing fuel smells, wasted fuel, and a dangerous fire hazard. For instance, an under-torqued fuel injector bolt could result in fuel spraying out onto a hot engine, potentially igniting.

Q4

Do I need to use new gaskets or seals when working with the fuel system?

Yes, it's generally best practice to replace gaskets and seals whenever disconnecting fuel lines or components. These parts can wear, compress, or become damaged during removal and may not seal correctly if reused. For example, when replacing a fuel filter, using new sealing washers will ensure a leak-free connection.

Q5

Should I apply threadlocker to fuel system bolts?

Generally, threadlocker is not recommended for fuel system bolts unless explicitly specified by Acura. The factory torque specification is designed to maintain the correct clamping force. Using threadlocker can potentially lead to over-torquing and damage if the spec is not adjusted. Refer to the service manual.

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 (3/8" Drive)

A calibrated torque wrench is essential for accurately tightening fuel system bolts to specification, preventing leaks and damage.

  • 3/8" drive for common bolt sizes
  • Click-type or digital readout for precise torque application
  • Range covering 8-25 ft-lbs (approximately 11-34 Nm)
Learn more

10mm Socket (3/8" Drive)

A standard 10mm socket is required to engage the heads of fuel system bolts.

  • 6-point socket for secure fit
  • 3/8" drive to match torque wrench
  • Standard depth
Learn more

12mm Socket (3/8" Drive)

A standard 12mm socket is required to engage the heads of fuel system bolts.

  • 6-point socket for secure fit
  • 3/8" drive to match torque wrench
  • Standard depth
Learn more

Fuel Line Disconnect Tool

Specialized tool to safely disconnect fuel lines without damaging the connectors or lines.

  • Plastic or metal construction
  • Various sizes to fit different line connectors
  • Prevents damage to fuel system components
Learn more
Service Procedures

Fuel Rail Bolt Torque Procedure

Properly torquing fuel rail bolts ensures a leak-free seal and prevents fuel system issues. Always replace any damaged hardware.

  • Disconnect the negative terminal of the battery.
  • Relieve fuel pressure in the fuel system.
  • Disconnect all fuel lines and electrical connectors to the fuel rail.
  • Remove the old fuel rail bolts.
  • Install the fuel rail and any new gaskets or seals if needed.
  • Install new bolts and hand-tighten them.
  • Using a 3/8" drive torque wrench and 12mm socket, torque the fuel rail bolts to 16 ft-lbs (22 Nm) in a criss-cross pattern.
  • Reconnect all fuel lines and electrical connectors.
  • Reconnect the negative battery cable.
View full procedure

Fuel Pump Access Panel Bolt Torque Procedure

Ensures the fuel pump access panel is properly secured to prevent fuel vapor leaks.

  • Disconnect the negative terminal of the battery.
  • Remove the rear seat cushion or the necessary trim to access the fuel pump access panel.
  • Remove the existing screws from the fuel pump access panel.
  • Install the access panel and hand tighten the bolts.
  • Using a 3/8" drive torque wrench and 10mm socket, torque the fuel pump access panel bolts to 8.7 ft-lbs (12 Nm) in a cross-pattern.
  • Reconnect the rear seat cushion and any removed trim.
  • Reconnect the negative terminal of the battery.
View full procedure
Technical Service Bulletins

Fuel Leakage from Fuel Rail Bolts

2011-05-15

Some 2009-2011 TSX models may experience fuel leakage around the fuel rail bolts due to improper torque during manufacturing or previous service. Check for signs of fuel leaks and retorque the bolts according to procedure if needed

2009-2011

Resolution: Inspect the fuel rail for leaks, replace bolts if necessary, and retorque the bolts to 16 ft-lbs (22 Nm) using a calibrated torque wrench.

Fuel Pump Access Panel Leakage

2013-02-20

Some 2012-2014 TSX models may experience fuel odor in the cabin due to improperly torqued fuel pump access panel bolts. Inspect the area for signs of leaks.

2012-2014

Resolution: Inspect the fuel pump access panel for leaks, replace any damaged bolts, and torque to 8.7 ft-lbs (12 Nm).

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 Acura Specs. All rights reserved.

Privacy Policy Terms of Service