Acura RLX 2014-2020 Fuel System Bolt Torque Specifications & Line Fittings
Acura RLX 2014-2020

Acura RLX 2014-2020 Fuel System Bolt Torque Specifications

Detailed torque specifications for fuel system bolts on the 2014-2020 Acura RLX, including fuel pump, fuel lines, and fuel rail fasteners.

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 Delivery System

Torque specifications for components within the fuel delivery system, ensuring proper sealing and function.

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure proper seating of fuel rail before tightening. Tighten all bolts evenly to prevent warping.
2

Fuel Injector Mounting Bolts/Fasteners

M5 x 0.8
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure injectors are properly seated into the fuel rail and intake manifold before tightening. Do not overtighten.
3

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure proper seating of the fuel pump assembly onto the fuel tank. Do not overtighten and damage the gasket or o-ring seal.
4

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure proper installation of the filter element. Do not overtighten.
5

Fuel Line Connection Fittings

Varies, typically M10-M14
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Torque value is an estimate, as fitting sizes can vary widely. Always consult service manual when possible. Use line wrenches to avoid rounding and damaging the fittings. Do not overtighten.

Fuel Tank And Filler

Torque specifications for components related to the fuel tank and filler system.

1

Fuel Filler Neck Mounting Bolts

M6 x 1.0
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the fuel filler neck before tightening. Do not overtighten.

Evaporative Emissions System

Torque specifications for components within the EVAP system.

1

EVAP System Purge Valve Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure proper seating of the purge valve. Do not overtighten.

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

What happens if I overtighten fuel line bolts?

Overtightening fuel line bolts can damage the fittings, crush the sealing washers, or even crack the fuel line itself. This can lead to fuel leaks, which are dangerous fire hazards. For example, an overtightened banjo bolt on the fuel rail could deform the sealing surface, causing a leak.

Q2

What happens if I undertighten fuel line bolts?

Undertightening fuel line bolts will not create a proper seal. This will result in fuel leaks, which are not only a safety hazard, but can also affect your vehicle's performance by causing a loss in fuel pressure. For example, a loose fuel filter connection can cause fuel to leak out when the pump is active.

Q3

Do I need to use new sealing washers when replacing fuel line bolts?

Yes, it's highly recommended to always use new sealing washers when replacing fuel line bolts. These washers are designed to crush and form a tight seal on installation. Reusing old washers can result in leaks, as they have already been compressed and may not create an effective seal on re-installation. An example would be to always replace the copper sealing washers on the fuel injectors.

Q4

Are the fuel line torque specifications the same for all bolts in the fuel system?

No, the torque specifications vary depending on the location and size of the bolt. For instance, the fuel injector mounting bolts will have a different torque spec than the fuel pump module bolts. Always refer to the specific service manual or torque chart for the exact values.

Q5

Can I use thread locker on fuel system bolts?

Generally, it is not recommended to use thread locker on fuel system bolts unless specifically indicated by the manufacturer in the service manual. Thread locker can make future removal more difficult and can potentially damage the bolt or the component if it's not designed for use with thread locker. For instance, most fuel line connections rely on the torque spec and a proper seal.

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

A calibrated torque wrench is essential for accurately tightening fuel system bolts to the manufacturer's specifications, preventing leaks and damage.

  • Ability to measure torque in Newton-meters (Nm)
  • Click-type mechanism for accurate torque application
Learn more

Socket Set

A standard socket set with various sizes is needed to fit the different bolt heads on the fuel system components.

  • Includes standard and metric sizes
  • Variety of drive sizes (e.g., 3/8", 1/4")
Learn more

Extension Bars

Extension bars allow access to bolts in hard-to-reach areas of the fuel system.

  • Various lengths to reach recessed areas
  • Durable construction
Learn more
Service Procedures

Fuel Rail Bolt Torque Procedure

This procedure outlines how to correctly tighten the fuel rail mounting bolts on a 2014-2020 Acura RLX fuel system.

  • Locate the fuel rail mounting bolts.
  • Using the appropriate socket, lightly thread the bolts by hand.
  • Set the torque wrench to 22 Nm (16 lb-ft) +/- 2 Nm. Always consult the service manual for the specific value. Verify the value before application.
  • Tighten the bolts in a criss-cross pattern to ensure even distribution of the tightening force.
  • Double check torque with torque wrench.
View full procedure

Fuel Injector Mounting Bolt Torque Procedure

This procedure details the correct way to tighten the bolts securing the fuel injectors to the fuel rail and intake manifold on a 2014-2020 Acura RLX.

  • Locate the fuel injector mounting bolts.
  • Hand-tighten the bolts to a snug fit.
  • Using a torque wrench, set the torque to 12 Nm (9 lb-ft). Always consult the service manual for the specific value. Verify the value before application.
  • Tighten bolts sequentially, starting from the innermost bolt to the outermost bolt. Use a cross pattern when more than one bolt per injector.
  • Double check torque with torque wrench.
View full procedure

Fuel Line Connector Torque Procedure

This procedure outlines the proper tightening procedure for fuel line banjo bolts and connectors on a 2014-2020 Acura RLX. Always use new crush washers during installation.

  • Locate the fuel line connector or banjo bolt.
  • Ensure all new crush washers are in place.
  • Hand-tighten to a snug fit
  • Using a torque wrench, set torque to 25 Nm (18 lb-ft). Always consult the service manual for the specific value. Verify the value before application.
  • Double check torque with torque wrench.
View full procedure
Technical Service Bulletins

Fuel Leakage From Rail Connection

2017-05-15

Some 2014-2017 Acura RLX models may experience fuel leaks from the fuel rail connection due to improper torque specifications. Always torque all bolts to factory specifications. This bulletin will provide correct specifications

2014-2017

Resolution: Inspect and replace any damaged o-rings. Torque the fuel rail mounting bolts to 22 Nm (16 lb-ft) using a criss-cross pattern. Verify torque using calibrated tool.

Injector Bolt Stripped Threads

2019-11-20

Reports of fuel injector bolt threads stripping during reassembly on 2018-2020 RLX models. This is often caused by over torquing the bolts. This bulletin specifies the correct torque and procedure

2018-2020

Resolution: Ensure all bolts are free from debris and thread smoothly by hand. Torque the fuel injector bolts to 12 Nm (9 lb-ft). Replace any bolts with signs of thread damage. Inspect injector mounting holes for deformation and repair as needed.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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