Buick Encore 2013-2019 Fuel System Bolt Torque Specifications & Line Fittings
Buick Encore 2013-2019

Buick Encore 2013-2019 Fuel System Bolt Torque Specifications

This page provides the torque specifications for fuel system bolts on the 2013-2019 Buick Encore, including the fuel pump, fuel lines, and fuel rail.

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 Rail And Injectors

Specifications for components related to the fuel rail, injectors, and their immediate mountings.

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even pressure.
2

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure injector is seated correctly with new O-rings before tightening.
3

Fuel Pressure Sensor Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated and use new O-ring if applicable. This sensor's location may vary.

Fuel Pump And Tank

Specifications related to the fuel pump module, tank straps, filler neck and tank pressure sensor.

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent leaks. Use a new gasket when reassembling.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure tank is properly supported before tightening. Use caution when tightening on straps.
3

Fuel Filler Neck Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure filler neck is seated correctly and aligned with fuel tank inlet. Do not over-tighten, check rubber hoses and clamps during reassembly.
4

Fuel Tank Pressure Sensor Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated. Use new seal or o-ring if applicable.

Fuel Lines And Filter

Specifications for fuel line fittings and fuel filter mounting.

1

Fuel Line Fitting/Banjo Bolt (Aluminum)

Varies - M12 x 1.5 estimated
Torque Value
17.5 ft-lbs (24 N·m)
Important Notes
Use an appropriate wrench to prevent damage. These values are an estimate based on material and common sizes.
2

Fuel Line Fitting/Banjo Bolt (Steel)

Varies - M12 x 1.5 estimated
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Use an appropriate wrench to prevent damage. These values are an estimate based on material and common sizes.
3

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure filter is properly seated before tightening. The bracket mounting the fuel filter should also be torqued to this specification.

Access Panels

Specifications for bolts/screws securing the fuel system access panels.

1

Fuel Tank Access Panel Bolts/Screws

M5 x 0.8
Torque Value
4.4 ft-lbs (6 N·m)
Important Notes
Do not over-tighten, as this could damage the body panel. This value is an estimate based on common sizes.

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 system bolts?

Overtightening fuel system bolts, especially those on plastic components, can lead to stripped threads, cracked housings, and damaged seals. This can result in fuel leaks, which are a significant fire hazard. For example, overtightening the fuel pump retaining ring could crack the pump housing, necessitating complete pump replacement.

Q2

What happens if I undertighten fuel system bolts?

Undertightening fuel system bolts can result in loose connections and fuel leaks. This can cause a loss of fuel pressure, leading to poor engine performance, stalling, and potential fire hazards. Imagine the fuel filter banjo bolt being undertightened; it could leak fuel under pressure when the engine is running.

Q3

Should I use thread locker on fuel system bolts?

Generally, thread locker is NOT recommended on fuel system bolts unless specifically stated by the manufacturer. Many fuel system components rely on specific torque values and seal designs. Thread locker can affect the accuracy of torque application and may interfere with the proper sealing of fuel-safe gaskets and o-rings. If the manufacturer specifies thread locker it must be compatible with fuel, so use caution.

Q4

Are there any special tools needed to torque fuel system bolts?

Yes, a torque wrench is essential for accurately tightening fuel system bolts. Using a standard wrench will not guarantee the correct torque, increasing the risk of damage or leaks. Some fuel components may also require specialized tools for disassembly or access, like a specific fuel line disconnect tool.

Q5

How often should I inspect my fuel system connections?

It is good practice to visually inspect fuel system connections for any signs of leaks or damage during routine maintenance. A good time would be during oil changes or any time the vehicle is raised up for other work. If you smell fuel or notice any wet spots around the fuel lines or connections, investigate immediately.

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-inch drive)

A calibrated torque wrench is essential for applying accurate torque to fuel system bolts. A 1/4-inch drive is suitable for the lower torque values typically found in fuel systems.

  • Calibrated in inch-pounds or Newton-meters
  • Click-type or digital readout
  • Accuracy within +/- 3%
Learn more

Torque Wrench (3/8-inch drive)

A calibrated 3/8 inch drive torque wrench may be needed for higher torque values.

  • Calibrated in foot-pounds or Newton-meters
  • Click-type or digital readout
  • Accuracy within +/- 3%
Learn more

Socket Set (Metric)

A set of metric sockets is necessary to fit the various bolt and nut sizes used in the Buick Encore fuel system.

  • Variety of sizes, typically from 8mm to 15mm
  • 6-point sockets for better grip
  • Chrome vanadium steel for durability
Learn more

Extension Bars

Extension bars are helpful for reaching bolts in tight spaces.

  • Various lengths available
  • Locking mechanism to prevent slippage
  • Durable steel construction
Learn more
Service Procedures

Fuel Rail Bolt Torque Procedure

This procedure outlines how to correctly torque the fuel rail bolts on a 2013-2019 Buick Encore.

  • Locate the fuel rail and identify the fuel rail mounting bolts.
  • Clean the threads of the bolt and the receiving hole.
  • Install all bolts by hand first.
  • Using a 1/4-inch drive torque wrench and appropriate socket, torque all the fuel rail bolts in a cross-pattern to 89 inch-lbs (10 Nm).
  • Double check torque.
View full procedure

Fuel Injector Retaining Bracket Bolt Torque Procedure

This procedure outlines how to correctly torque the fuel injector retaining bracket bolts on a 2013-2019 Buick Encore.

  • Locate the fuel injector and the associated retaining bracket.
  • Clean the threads of the bolt and the receiving hole.
  • Install all bolts by hand first.
  • Using a 1/4-inch drive torque wrench and appropriate socket, torque the fuel injector bracket bolts to 89 inch-lbs (10 Nm).
  • Double check torque.
View full procedure

High Pressure Fuel Pump Bolt Torque Procedure

This procedure outlines how to correctly torque the high pressure fuel pump mounting bolts on a 2013-2019 Buick Encore.

  • Locate the high pressure fuel pump and the mounting bolts.
  • Clean the threads of the bolt and the receiving hole.
  • Install all bolts by hand first.
  • Using a 3/8-inch drive torque wrench and appropriate socket, torque the high pressure fuel pump bolts to 22 ft-lbs (30 Nm).
  • Double check torque.
View full procedure
Technical Service Bulletins

Fuel Rail Bolt Corrosion Issues

2017-05-15

Some 2013-2017 Buick Encore models have experienced premature corrosion on fuel rail bolts, leading to inaccurate torque readings and possible fuel leaks. Inspect and replace if necessary.

2013-2017

Resolution: Inspect fuel rail bolts for corrosion. If corrosion is present, replace all bolts with updated parts and follow the specified torque procedure. Apply anti-seize compound to bolt threads.

Updated Fuel Injector Bracket Design

2018-11-20

A revised fuel injector retaining bracket design was implemented starting with the 2018 model year. When replacing an injector on older models, it may be necessary to also replace the bracket with the updated version. Confirm compatibility with the VIN.

2013-2017

Resolution: When replacing fuel injectors on 2013-2017 models, inspect the retaining bracket. Use the updated bracket part number if the original bracket is being replaced. Follow the specified torque procedure when reinstalling.

High Pressure Fuel Pump Mounting Bolt Loosening

2019-03-01

Some 2016-2019 Buick Encore models have experienced high pressure fuel pump mounting bolts loosening. Inspect torque at specified intervals.

2016-2019

Resolution: Inspect torque on the high pressure fuel pump mounting bolts at 10,000 mile intervals. If loosened, retorque per service procedure. Consider using thread locking compound.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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