Acura TLX 2021-present Fuel System Bolt Torque Specifications & Line Fittings
Acura TLX 2021-present

Acura TLX 2021-present Fuel System Bolt Torque Specifications

Complete factory torque specifications for all fuel components of the 2021-Present Acura TLX, including detailed procedures and specifications.

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 Components

Torque specifications for fuel system components and related mounting hardware on the 2021-Present Acura TLX.

1

Fuel Pump Module Retaining Bolts

M6 x 1.0
Torque Value
7.2 ft-lbs (9.8 N·m)
Important Notes
Tighten in a crisscross pattern. Ensure the fuel pump gasket is properly seated before tightening. Do not over-tighten as this can damage the fuel tank.
2

Fuel Level Sensor Unit Mounting Screws

M4 x 0.7
Torque Value
3 ft-lbs (4.1 N·m)
Important Notes
Ensure the fuel level sensor is properly seated against the fuel tank before tightening screws. Do not over-tighten as this can damage the sensor housing.
3

Fuel Filter Bracket Mounting Bolt

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure the bracket is properly aligned before tightening. Check for any interference before fully torquing.
4

High Pressure Fuel Line Connection Banjo Bolt (Engine Side)

M14 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Use new sealing washers. Ensure proper alignment of fuel line to avoid cross-threading. Always use a backup wrench on the fuel rail fitting.
5

High Pressure Fuel Line Connection Banjo Bolt (Pump Side)

M12 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Use new sealing washers. Ensure proper alignment of fuel line to avoid cross-threading. Always use a backup wrench on the fuel pump fitting.
6

Fuel Injector Retaining Bolt (each)

M6 x 1.0
Torque Value
7.2 ft-lbs (9.8 N·m)
Important Notes
Do not overtighten. Ensure the injector is fully seated and properly oriented with the fuel rail.

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 type of fuel is recommended for the 2021-Present Acura TLX?

The 2021-Present Acura TLX models are designed to run on premium unleaded gasoline with an octane rating of 91 or higher. This is the recommended fuel for optimal performance and engine longevity.

Q2

Can I use regular unleaded gasoline in my Acura TLX?

While using regular unleaded gasoline (with a lower octane rating, typically 87) *may* be possible without causing immediate damage, it is strongly discouraged. Regular fuel can lead to reduced performance, decreased fuel efficiency, and potential long-term engine problems due to engine knocking (pre-ignition).

Q3

Will using premium fuel improve my fuel economy or performance?

Yes, using the recommended premium fuel (91 octane or higher) will allow the TLX's engine to operate at its designed optimal performance, potentially resulting in improved fuel economy and overall engine performance compared to using regular fuel. The difference may be subtle but is designed to benefit engine health over time.

Q4

What happens if I accidentally fill my Acura TLX with diesel fuel?

Using diesel fuel in a gasoline engine can cause serious damage. If you accidentally fill your Acura TLX with diesel, DO NOT start the engine. Have the vehicle towed to a qualified service center immediately to have the fuel tank drained and the fuel system properly cleaned.

Q5

Are there any fuel additives I should be using?

Acura does not generally recommend the use of aftermarket fuel additives. The recommended premium fuel already contains detergents and other additives necessary for proper engine operation. Using unapproved additives could potentially harm your vehicle’s fuel system. Consult your owner's manual or an authorized Acura dealer for specific recommendations regarding fuel system maintenance.

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 (10-100 Nm)

Required for precise tightening of fuel line fittings and fuel pump assembly bolts. Prevents overtightening and damage to components.

  • 1/2" Drive
  • Digital display or click-type
  • Accuracy within +/- 2%
  • Nm and ft-lb scales
Learn more

Torque Wrench (5-25 Nm)

Needed for lower torque specifications on fuel sensor and other smaller connections.

  • 3/8" Drive
  • Digital display or click-type
  • Accuracy within +/- 2%
  • Nm and in-lb scales
Learn more

Fuel Line Disconnect Tool Set

Essential for safely disconnecting fuel lines without damaging the quick-connect fittings. Prevents fuel leaks and component damage.

  • Various sizes to fit Acura fuel lines
  • Durable plastic construction
  • Ergonomic grip for ease of use
Learn more

Fuel Pressure Gauge Kit

Used to measure fuel pressure at various points in the fuel system for diagnostic purposes. Helps identify fuel pump, regulator, or injector issues.

  • Multiple adapters for different fuel systems
  • Pressure readings in PSI or kPa
  • Bleed valve for pressure release
Learn more

Fuel Tank Access Cover Removal Tool

Specialty tool to safely remove and install the fuel tank access cover without damaging the plastic cover or surrounding area.

  • Ergonomic handle
  • Non-marring material
  • Specific design for Acura fuel tank access cover
Learn more

Multimeter

Required for testing electrical circuits related to the fuel system, such as pump power supply and fuel sensor signals.

  • Voltage, current, and resistance measurement
  • Continuity testing
  • Digital display
  • Auto-ranging
Learn more
Service Procedures

Fuel Filter Replacement

Procedure for replacing the fuel filter, which is a routine maintenance item. It's usually located in or near the fuel tank, depending on the model.

  • Step 1: Depressurize the fuel system by disconnecting the fuel pump fuse and attempting to start the engine until it stalls.
  • Step 2: Locate the fuel filter, often near the fuel tank or inline along the fuel line.
  • Step 3: Using the Fuel Line Disconnect Tool Set, carefully disconnect the fuel lines from the filter.
  • Step 4: Remove the old fuel filter and replace with the new fuel filter, ensuring proper flow direction (indicated by arrows on the filter).
  • Step 5: Reconnect fuel lines and use the appropriate torque wrench for fuel line fittings.
  • Step 6: Replace fuel pump fuse and check for leaks and proper operation.
View full procedure

Fuel Pump Removal and Installation

Procedure for removing and installing the fuel pump. This procedure is more complex and requires attention to detail.

  • Step 1: Depressurize the fuel system as detailed in the fuel filter replacement procedure.
  • Step 2: Access the fuel pump through the access panel under the rear seat or in the trunk.
  • Step 3: Disconnect the electrical connector(s) to the fuel pump assembly.
  • Step 4: Carefully disconnect the fuel lines using the Fuel Line Disconnect Tool Set.
  • Step 5: Remove the fuel pump assembly from the fuel tank.
  • Step 6: Install the new fuel pump assembly, ensuring the fuel pump is correctly oriented and the fuel sock or filter is properly placed.
  • Step 7: Reconnect the fuel lines, using the appropriate torque wrench.
  • Step 8: Reconnect electrical connectors.
  • Step 9: Replace fuel tank access panel, using the Fuel Tank Access Cover Removal Tool.
  • Step 10: Replace fuel pump fuse and check for leaks and proper operation.
View full procedure

Fuel Pressure Testing

Procedure for testing the fuel pressure to help diagnose fuel system issues.

  • Step 1: Locate the fuel pressure test port on the fuel rail.
  • Step 2: Connect the Fuel Pressure Gauge Kit to the test port.
  • Step 3: Start the engine and note the fuel pressure reading.
  • Step 4: Compare the reading to the manufacturer's specification (typically around 45-60 PSI for most systems).
  • Step 5: Perform additional tests per diagnostic procedures if the pressure is not within spec, such as leak-down tests.
  • Step 6: Carefully disconnect the pressure gauge and check for leaks.
View full procedure
Technical Service Bulletins

Fuel Pump Relay Failure (Potential Stalling Condition)

2023-04-15

Some 2021-2023 TLX models may experience intermittent engine stalling or hard starting due to a faulty fuel pump relay. This can be related to a faulty relay or poor connection.

2021-2023 TLX

Resolution: Inspect fuel pump relay terminals for corrosion or looseness. If necessary, replace the fuel pump relay. Consider replacing the fuel pump if previous replacement was recent and with the same batch of relays.

Fuel Tank Vent Valve Malfunction (Check Engine Light)

2022-08-20

Some 2021-Present TLX models may exhibit a check engine light related to evaporative emission (EVAP) system issues, specifically a faulty fuel tank vent valve. This can cause the check engine light, and can also cause issues with fueling.

2021-Present TLX

Resolution: Diagnose the EVAP system using an OBD2 scanner. If a code related to the fuel tank vent valve is present, inspect the vent valve and its associated tubing. Replace the fuel tank vent valve if necessary.

Fuel Injector Issues (Poor Fuel Efficiency and Misfires)

2024-01-10

Some 2022-Present TLX models may experience poor fuel economy, rough idling, or misfire issues due to dirty or malfunctioning fuel injectors. This may result in a misfire code on a specific cylinder.

2022-Present TLX

Resolution: Test the fuel injectors using a multimeter to check resistance and voltage, and perform an injector balance test using an advanced scan tool. Consider a professional fuel injector cleaning service or injector replacement as needed. Review fuel additive recommendations.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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