Audi Audi A5 2016-present 2.0L Engine Bolt Torque Specifications & Fastener Values
Audi Audi A5 2016-present

Audi Audi A5 2016-present 2.0L Engine Bolt Torque Specifications

Detailed torque specifications for various bolts and fasteners used in the 2.0L engine of the 2016-Present Audi A5, including cylinder head, connecting rod, main bearing cap, and other critical engine 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

2.0l-engine Cylinder Head

Torque specifications for the cylinder head and related components.

1

Cylinder Head Bolts

M10 x 1.5
Important Notes
Cylinder head bolts are tightened in a specific sequence and require angle torque after the initial torque value. Refer to the manufacturer's manual for the correct sequence. Use new bolts for each installation.
2

Camshaft Bearing Cap Bolts

M8 x 1.25
Important Notes
Camshaft bearing cap bolts require an initial torque and then an additional angle. Refer to the manufacturer's manual for the specific sequence. These bolts should be tightened in stages.
3

Valve Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Valve cover bolts require low torque to prevent gasket damage. Tighten in a criss-cross pattern to evenly distribute pressure.
4

Spark Plugs

M14 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Correct torque is essential to ensure good contact with the cylinder head for proper heat transfer. Do not over tighten.
5

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
These bolts must be torqued to ensure proper valve operation. Do not over tighten.
6

Ignition Coil Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Low torque is required to avoid damaging the coils. Do not over tighten.
7

Variable Valve Timing (VVT) Solenoid Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
These bolts secure the VVT solenoids to the cylinder head. Ensuring these are correctly torqued will ensure proper valve operation.

2.0l-engine Block

Torque specifications for engine block components.

1

Main Bearing Bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Main bearing bolts must be torqued in a specified sequence to ensure proper crankshaft alignment. Ensure correct torque is applied.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Connecting rod nuts must be torqued properly to prevent bearing failure. Ensure correct torque is applied.
3

Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Oil pan bolts are low torque to prevent gasket damage. Tighten in a criss-cross pattern to evenly distribute pressure and prevent leaks.
4

Water Pump Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Water pump bolts must be correctly torqued to prevent coolant leaks. Tighten in a criss-cross pattern to evenly distribute pressure.
5

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Oil filter housing bolts must be correctly torqued to prevent oil leaks. Ensure correct torque is applied.
6

Crank Position Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
This bolt secures the crankshaft position sensor to the engine block. Proper torque will ensure correct sensor readings.
7

Knock Sensor Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
The knock sensor is critical to sensing engine knock or detonation. This sensor must be properly torqued to the engine block to function correctly.

2.0l-engine Timing System

Torque specifications for the timing system components.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Proper torque is critical for maintaining the correct timing between the crankshaft and camshafts. Do not over tighten.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
These bolts must be torqued properly to prevent timing slippage or damage to the timing system. Ensure correct torque is applied.

2.0l-engine External Components

Torque specifications for external engine components.

1

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
96 ft-lbs (130 N·m)
Important Notes
This bolt is critical for proper drive belt function and helps to absorb the engine's torsional vibrations. High torque is necessary. Ensure correct torque is applied.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Water pump pulley bolts must be properly torqued to prevent the pulley from loosening.
3

Drive Belt Idler Pulley Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the idler pulley to its mounting point on the engine. Ensures proper belt tensioning.
4

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Seals the oil pan drain hole. Proper torque is critical for preventing oil leaks.

2.0l-engine Intake System

Torque specifications for the intake system components.

1

Throttle Body Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Low torque is sufficient here to avoid damaging the throttle body or its gasket. Ensure correct torque is applied.
2

Intake Manifold Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Proper torque is important to maintain an air-tight seal and proper engine performance. Tighten in a criss-cross pattern to evenly distribute pressure.
3

EGR Valve Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Torque is important to prevent leaks in the EGR system. Ensure correct torque is applied.
4

Fuel Rail Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Proper torque maintains fuel system pressure and prevents leaks. Ensure correct torque is applied.
5

Fuel Injector Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Proper torque prevents fuel leaks. Ensure correct torque is applied.
6

Fuel Filter Bolt/Nut

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures the fuel filter to its mounting bracket. Prevents leaks in the fuel system.

2.0l-engine Exhaust System

Torque specifications for the exhaust system components.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
These bolts are exposed to high temperatures, and proper torque is vital for preventing exhaust leaks. Ensure correct torque is applied. Tighten in a criss-cross pattern to evenly distribute pressure.

2.0l-engine Cooling System

Torque specifications for the cooling system components.

1

Thermostat Housing Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Holds the thermostat housing to the engine block. Proper torque prevents coolant leaks. Ensure correct torque is applied.
2

Coolant Temperature Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Secures the coolant temperature sensor to the engine. This helps to read correct engine temperature readings. Often found on the thermostat housing.

2.0l-engine Transmission System

Torque specifications for transmission-related components.

1

Flywheel Bolts

M10 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Attaches the flywheel (or flexplate for automatic transmissions) to the crankshaft. These bolts must withstand the engine's rotating forces. They are typically high-strength bolts. Use new bolts for each installation. Ensure correct torque is applied.

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 torque specifications important when working on my 2.0L Audi A5 engine?

Correct torque specifications are crucial for ensuring proper clamping force on engine components. Under-tightening can lead to leaks, vibrations, and component failure. Over-tightening can damage threads, warp parts, and potentially cause catastrophic engine damage. Using the correct torque prevents damage, ensures longevity, and guarantees proper function of the 2.0L engine. For instance, improperly torqued cylinder head bolts could cause head gasket failure and coolant leaks.

Q2

Do I need a special torque wrench for these specifications?

Yes, a calibrated torque wrench is essential. A standard wrench or impact driver will not provide accurate torque values. Different ranges may be required depending on the bolts you are torquing, so you may need multiple wrenches. For instance, low-torque bolts such as those on the intake manifold will require a lower range tool while higher torque bolts such as those on the crankshaft damper will require a higher range.

Q3

What does 'Nm' and 'lb-ft' mean in torque specifications?

'Nm' stands for Newton-meters, and 'lb-ft' stands for pound-feet. These are units of torque, or the turning force applied to a fastener. Torque specifications will be listed in both Nm and lb-ft. It's important to use the correct units when setting your torque wrench to avoid errors, especially in the case of critical components such as head bolts, which may be torque-to-yield and require exact torque/angle specifications. Always double check!

Q4

Should I use new bolts each time I disassemble a component?

For critical components such as head bolts, and especially for 'torque-to-yield' bolts, it is highly recommended to use new bolts each time you disassemble them. Torque-to-yield bolts are designed to stretch when torqued and often cannot be reused. Using old bolts could result in improper clamping force, leaks, and potential engine damage. Some areas such as intake and exhaust manifolds might be okay to reuse bolts, but it is critical to check manufacturer guidelines.

Q5

Do I need to use thread locker for certain bolts?

Yes, certain bolts on the 2.0L engine, especially those exposed to vibration or high heat, may require thread locker (e.g., Loctite). This prevents bolts from loosening over time. Refer to the specific component's repair manual for whether or not threadlocker is required and the grade. For example, bolts holding exhaust components and flywheel are good examples of where a medium to high strength threadlocker will be necessary. Always use the recommended type/grade.

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 (1/2-inch Drive)

A calibrated torque wrench is essential for applying accurate torque to bolts and fasteners. 1/2-inch drive is suitable for most engine components.

  • Calibrated for accurate torque readings
  • Wide torque range for various applications
Learn more

Torque Wrench (3/8-inch Drive)

A smaller 3/8-inch drive torque wrench is useful for smaller bolts and fasteners, especially in tighter engine bay areas.

  • Calibrated for accurate torque readings
  • Smaller head for access in tight spaces
Learn more

Socket Set (Metric)

A comprehensive metric socket set is required to fit various bolt heads on the 2.0L engine.

  • Includes a variety of socket sizes
  • Durable construction
Learn more

Extension Bars

Extension bars of varying lengths are needed to reach recessed or hard-to-access bolts.

  • Various lengths for different applications
  • Durable construction
Learn more

Universal Joint

A universal joint allows the socket to be used at an angle, facilitating access to awkwardly positioned fasteners.

  • Allows socket to swivel for angled access
  • Durable construction
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure

This procedure outlines the correct method for tightening cylinder head bolts on a 2.0L engine to ensure a proper seal.

  • Clean threads of both bolt and bolt holes.
  • Apply a small amount of engine oil to the bolt threads and under the bolt head.
  • Hand tighten all bolts.
  • Tighten all bolts to specified torque in the specified sequence.
  • Perform angle tightening procedure as necessary to factory spec.
  • Verify all bolts are within correct torque specification.
View full procedure

Main Bearing Cap Bolt Tightening Procedure

This procedure details the steps for tightening main bearing cap bolts to the factory specification.

  • Clean threads of both bolt and bolt holes.
  • Apply a small amount of engine oil to the bolt threads and under the bolt head.
  • Hand tighten all bolts in the correct sequence.
  • Tighten all bolts to the specified torque in the specified sequence.
  • Perform angle tightening procedure as necessary to factory spec.
  • Verify all bolts are within correct torque specification.
View full procedure

Connecting Rod Bolt Tightening Procedure

This procedure details the steps for tightening connecting rod bolts to factory specification.

  • Clean threads of both bolt and bolt holes.
  • Apply a small amount of engine oil to the bolt threads and under the bolt head.
  • Hand tighten all bolts.
  • Tighten all bolts to specified torque in the specified sequence.
  • Perform angle tightening procedure as necessary to factory spec.
  • Verify all bolts are within correct torque specification.
View full procedure

Intake Manifold Bolt Tightening Procedure

This procedure details the steps for tightening intake manifold bolts to factory specification.

  • Clean threads of both bolt and bolt holes.
  • Hand tighten all bolts.
  • Tighten all bolts to the specified torque in the specified sequence.
  • Verify all bolts are within correct torque specification.
View full procedure

Exhaust Manifold Bolt Tightening Procedure

This procedure details the steps for tightening exhaust manifold bolts to factory specification.

  • Clean threads of both bolt and bolt holes.
  • Hand tighten all bolts.
  • Tighten all bolts to the specified torque in the specified sequence.
  • Verify all bolts are within correct torque specification.
View full procedure
Technical Service Bulletins

Oil Leak from Timing Chain Tensioner Area

2019-03-15

Some 2.0L engines may experience oil leaks due to improper tightening of the timing chain tensioner bolts. This bulletin provides updated torque specs and procedure.

2016-2018 Audi A5

Resolution: Replace the tensioner, ensuring to tighten the mounting bolts to 20Nm + 90 degree angle. Consult a factory service manual for the most up to date procedures.

Cylinder Head Bolt Re-torquing Requirement

2020-06-22

It has been found that some 2.0L engines require cylinder head bolts to be re-torqued after initial installation to prevent leaks.

2017-2019 Audi A5

Resolution: After initial assembly and operation, loosen bolts and retighten them to factory spec. Consult the latest factory manual for details. Verify all bolts are within correct torque specification.

Updated Torque Specification for Oil Pan Bolts

2022-01-10

An updated torque spec has been released for oil pan bolts on the 2.0L engine to prevent leaks and ensure a proper seal.

2020-2022 Audi A5

Resolution: Tighten all oil pan bolts to 15Nm. Refer to factory service manual for the correct tightening sequence. Verify all bolts are within correct torque specification.

About the Author

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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.

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