Acura ILX 2013-2021 Fuel System Bolt Torque Specifications & Line Fittings
Acura ILX 2013-2021

Acura ILX 2013-2021 Fuel System Bolt Torque Specifications

This page provides detailed torque specifications for fuel-related bolts on the 2013-2021 Acura ILX, including fuel pump, fuel line, and fuel rail bolts. Ensure proper torque when servicing your vehicle's fuel system.

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 components related to the fuel rail.

1

Fuel Rail Mounting Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Secures the fuel rail to the intake manifold or cylinder head. Ensure proper seal.
2

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel injectors to the fuel rail or intake manifold. Avoid over-tightening.
3

Fuel Injector Rail Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
May be redundant to Fuel Rail Bolts depending on application. Verify location prior to installation. Secures the fuel rail to the intake manifold, cylinder head, or other mounting points. Avoid over-tightening.
4

Fuel Line Fitting Bolts/Nuts (at Fuel Rail)

M10 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Secures fuel lines to the fuel rail. Aluminum fittings may require a lower torque. Do not over-tighten.
5

Fuel Pressure Regulator Mounting Bolts/Screws

M5 x 0.8
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Mounts the fuel pressure regulator to the fuel rail. Estimated value; use lower end of spec if a screw is used. Verify size in service manual.

Fuel System Fuel Pump

Torque specifications for components related to the fuel pump.

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel pump assembly to the fuel tank. Ensure proper sealing.
2

Fuel Line Fitting Bolts/Nuts (at Fuel Pump)

M10 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Secures fuel lines at the fuel pump. Aluminum fittings may require a lower torque. Do not over-tighten.

Fuel System Fuel Tank

Torque specifications for components related to the fuel tank.

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Secures the fuel tank straps to the vehicle body. Important for tank stability. Ensure no fuel lines or other components are pinched or damaged in mounting process.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Secures the fuel filler neck to the vehicle body. Proper seal prevents leaks and vapors from escaping. Ensure no fuel lines or other components are pinched or damaged in mounting process.
3

Fuel Tank Access Cover/Panel Bolts/Screws

M5 x 0.8
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel tank access cover/panel to the vehicle. Estimated value, use lower end of spec if screws are used. Prevents fumes from entering cabin.

Fuel System Fuel Filter

Torque specifications for components related to the fuel filter.

1

Fuel Filter Bolt/Nut

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Secures the fuel filter bracket or filter itself. Prevents fuel leaks. Ensure no fuel lines or other components are pinched or damaged in mounting process.
2

Fuel Line Fitting Bolts/Nuts (at Fuel Filter)

M10 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Secures fuel lines at the fuel filter. Aluminum fittings may require a lower torque. Do not over-tighten.

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 correct torque specifications important for fuel system bolts?

Correct torque ensures proper sealing and prevents fuel leaks. Under-torquing can lead to leaks, while over-torquing can damage threads or the component itself, potentially causing fuel system failure and fire hazards. For example, overtightening a fuel pump flange bolt can crack the flange, leading to fuel leakage.

Q2

What happens if I don't use a torque wrench for fuel system bolts?

Using a torque wrench is crucial for fuel system components. Without one, you risk either under-tightening, which could cause fuel leaks and potentially dangerous situations, or over-tightening, which can damage the bolt, threads, or component. For instance, tightening fuel line banjo bolts by feel instead of using the specified torque can crush sealing washers and create leaks.

Q3

Are torque specifications the same for all fuel system components?

No, torque specifications vary depending on the specific component and the bolt size/material. Refer to the repair manual or a reliable source for each specific connection. For instance, the torque spec for fuel pump bolts will be different than the fuel injector rail mounting bolts. Always verify torque specifications before proceeding.

Q4

Do I need to replace bolts when working on the fuel system?

It is generally recommended to replace crush washers, sealing rings, and any torque-to-yield bolts or fasteners when disassembling fuel system components. Reusing them can compromise the seal, increasing the risk of leaks. For example, fuel line crush washers should be replaced every time they are removed.

Q5

What if I can't find the exact torque specification for a particular bolt?

If you cannot locate the exact torque specification, do NOT guess. Consult the manufacturer's repair manual or a reliable database. In some cases, generic torque specifications for bolt size/grade can be used but with EXTREME caution and thorough research. When in doubt, it's always safer to consult a professional.

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 (1/4" or 3/8" Drive)

A calibrated torque wrench is essential for achieving accurate fuel system bolt torque.

  • Measures torque in inch-pounds (in-lbs) or Newton-meters (Nm)
  • Click-type or digital readout for precise settings
Learn more

Socket Set

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

  • Metric sizes (typically 8mm, 10mm, 12mm)
  • 6-point sockets recommended for secure grip
Learn more

Extension Bars

Extension bars provide access to recessed or hard-to-reach fuel system bolts.

  • Various lengths for different access requirements
  • Securely attach to torque wrench and sockets
Learn more

Ratchet

A ratchet handle allows for quick tightening and loosening of bolts.

  • Reversible ratcheting mechanism
  • Provides leverage for bolt movement
Learn more
Service Procedures

Fuel Rail Bolt Torque Procedure

This procedure outlines the proper steps to torque fuel rail bolts to specification on a 2013-2021 Acura ILX.

  • Locate the fuel rail bolts.
  • Refer to the vehicle's service manual or manufacturer specifications for the correct torque value.
  • Attach the appropriate socket to your torque wrench.
  • Set the torque wrench to the specified torque value.
  • Tighten each bolt to the specified torque in a cross pattern to ensure even pressure.
  • Verify the torque on each bolt using the torque wrench a second time to confirm.
  • Do not overtighten, as this can damage the threads or fuel system components.
View full procedure

Fuel Injector Retaining Bolt Torque Procedure

This procedure outlines the proper steps to torque fuel injector retaining bolts to specification on a 2013-2021 Acura ILX.

  • Locate the fuel injector retaining bolts.
  • Refer to the vehicle's service manual or manufacturer specifications for the correct torque value.
  • Attach the appropriate socket to your torque wrench.
  • Set the torque wrench to the specified torque value.
  • Tighten each bolt to the specified torque in a cross pattern or sequence as specified by the manufacturer.
  • Verify the torque on each bolt using the torque wrench a second time to confirm.
  • Do not overtighten, as this can damage the threads or the fuel injectors.
View full procedure

Fuel Line Connection Torque Procedure

This procedure outlines the proper steps to torque fuel line connection fittings to specification on a 2013-2021 Acura ILX.

  • Locate the fuel line connection fittings.
  • Refer to the vehicle's service manual or manufacturer specifications for the correct torque value.
  • Use the appropriate size wrench for the fitting.
  • Tighten the fitting to the specified torque value. Avoid overtightening.
  • Verify the torque of the fitting connection, and also ensure there are no fuel leaks
View full procedure
Technical Service Bulletins

Fuel Leakage from Improperly Torqued Fuel Rail Bolts

2017-05-15

Some 2013-2016 Acura ILX models may experience fuel leaks due to improperly torqued fuel rail bolts. This can occur after service or maintenance involving the fuel system.

2013-2016

Resolution: Inspect all fuel rail bolts. Retorque to specified torque value using a calibrated torque wrench. Replace any damaged components.

Fuel Injector Seal Leakage Related to Incorrect Fastener Torque

2019-11-20

Some 2016-2021 Acura ILX models may experience fuel injector seal leaks. This may be the result of fasteners not being tightened to specifications. Proper torque is crucial to maintaining sealing around the injectors.

2016-2021

Resolution: Inspect fuel injector retaining bolts. Remove and inspect the seal on the injector. Ensure the surfaces are clean, replace seals as needed, and torque to specification.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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