Audi Audi A4 2017-present 2.0L Engine Bolt Torque Specifications & Fastener Values
Audi Audi A4 2017-present

Audi Audi A4 2017-present 2.0L Engine Bolt Torque Specifications

Comprehensive guide to bolt torque specifications for the 2.0L engine in the 2017-Present Audi A4, including cylinder head, main bearing, and connecting rod bolts.

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

M12 x 1.75
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Cylinder head bolts often require a torque-to-yield procedure not fully specified here. Refer to the vehicle-specific repair manual for final torque/angle. Estimated value.
2

Valve Cover Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts evenly to prevent leaks.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
17 ft-lbs (24 N·m)
Important Notes
Tighten bolts evenly to ensure correct valve operation. Estimated value.
4

Camshaft Bearing Cap Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts in a criss-cross pattern to ensure even pressure. Estimated value.
5

Camshaft Sprocket Bolts

M10 x 1.5
Torque Value
76 ft-lbs (103 N·m)
Important Notes
High torque bolts crucial for timing. Ensure proper torque to prevent engine damage.
6

Spark Plugs

M14 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure proper seating. Do not over-tighten.
7

Ignition Coil Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper electrical connection.
8

Cylinder Head Cover Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Tighten bolts in a criss-cross pattern to ensure even pressure. Estimated value.

2.0l-engine Block

Torque specifications for engine block components.

1

Main Bearing Bolts

M10 x 1.5
Torque Value
42 ft-lbs (57 N·m)
Important Notes
Main bearing bolts often require a torque-to-yield procedure not fully specified here. Refer to the vehicle-specific repair manual for final torque/angle. Estimated value.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
24 ft-lbs (33 N·m)
Important Notes
Connecting rod nuts often require a torque-to-yield procedure not fully specified here. Refer to the vehicle-specific repair manual for final torque/angle. Estimated value.
3

Oil Pan Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten evenly to prevent leaks.
4

Water Pump Bolts

M8 x 1.25
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure even tightening to prevent coolant leaks.
5

Oil Drain Plug

M14 x 1.5
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Tighten to prevent leaks.

2.0l-engine Intake

Torque specifications for intake system components.

1

Intake Manifold Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten in a criss-cross pattern to prevent leaks.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten evenly to prevent vacuum leaks.
3

Fuel Rail Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper sealing to prevent fuel leaks.
4

Fuel Injector Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper sealing to prevent fuel leaks.
5

PCV Valve/Hose Connections

Estimated M5 x 0.8
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten to prevent damage to the plastic fittings. Estimated Value.
6

EGR Valve Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure proper sealing to prevent leaks.

2.0l-engine Exhaust

Torque specifications for exhaust system components.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten evenly to prevent leaks. Estimated Value.
2

Turbocharger Mounting Bolts

M10 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Ensure proper sealing to prevent exhaust leaks.
3

Turbocharger Oil Line Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Ensure proper sealing to prevent oil leaks.

2.0l-engine Timing

Torque specifications for timing system components.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
19 ft-lbs (26 N·m)
Important Notes
Proper tension is critical for timing belt/chain operation. Verify tension after torque.

2.0l-engine Accessories

Torque specifications for accessory drive components and engine mounts.

1

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
84 ft-lbs (114 N·m)
Important Notes
Critical for accessory drive. Ensure proper torque to prevent vibrations.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper tightening for water pump operation.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten evenly to prevent coolant leaks.
4

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure proper belt tension after tightening.
5

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure pulley is properly aligned and secure.
6

Engine Mount Bolts (Engine Side)

M12 x 1.75
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Secure engine to the mount. Estimated value.
7

Flywheel Bolts

M10 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure proper power transfer and prevent vibrations.

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 proper torque specifications so important?

Using the correct torque ensures that bolts are tightened sufficiently to hold components securely without being overstressed or damaged. Under-torquing can lead to loosening and component failure, while over-torquing can stretch or break bolts, strip threads, or damage the components themselves. For example, over-tightening the cylinder head bolts can warp the head, causing coolant or oil leaks.

Q2

What happens if I don't have a torque wrench?

While it's strongly recommended to use a calibrated torque wrench, if absolutely necessary, you can attempt to get close using the ‘feel’ method, but this carries a high risk of errors. This method is never as precise as using a torque wrench. The best course of action is to borrow, rent or purchase the appropriate tool. Always refer to the service manual for the exact tightening specifications. For example, a bolt hand-tightened might feel fine, but might not be holding with enough force leading to a future failure.

Q3

Do torque specs change if I use new bolts?

It is always advisable to follow factory torque specifications regardless of using new or used bolts. However, when using 'stretch bolts' often found in critical engine components, they should ALWAYS be replaced when disassembled. Torque procedures may have a specific 'angle' or 'stage' tightening method that must be followed exactly. Old bolts can also have a different friction due to wear so replacing is often recommended when disassembling the engine. Consult the service manual specific to the part you're replacing for the correct procedure.

Q4

What if my torque wrench is not calibrated?

Using an uncalibrated torque wrench can lead to inaccurate torque values, potentially resulting in either under- or over-tightening. This could cause component failure, damage, or leaks. It's best to have your torque wrench calibrated periodically to ensure accuracy or use a calibrated rental unit. It is advisable to check if your tool needs calibration when purchasing a new or second-hand torque wrench. An example is the use of a digital torque wrench - although it is easy to read, it is still essential that it is calibrated regularly.

Q5

How often should I check the tightness of bolts after a repair?

While torque specifications are designed to hold components in place, certain components may settle after repair, or bolts may loosen over time especially with parts subject to vibration. For critical engine components, it's recommended to re-check torque after a short period of running the engine (e.g., after 10-20 minutes) and then again after the first few hundred miles, following a procedure called 'retorquing' if needed. Refer to specific repair procedures to be certain if a retorque is needed. An example would be engine mounts which may settle after installation and the bolts may loosen over time.

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" Drive)

A calibrated torque wrench is essential for accurate tightening of bolts to specified torque values. A 1/2" drive is recommended for most engine components.

  • Click-type mechanism for precise torque application
  • Wide torque range covering necessary specifications
Learn more

Torque Wrench (3/8" Drive)

A smaller 3/8" drive torque wrench for applications with tighter spaces or lower torque requirements.

  • Click-type mechanism for precise torque application
  • Appropriate for smaller bolts and lower torque values
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets in various sizes needed for engine component bolts.

  • Wide range of socket sizes
  • Both standard and deep socket options
Learn more

Extension Bars (Various Lengths)

Extension bars of different lengths to reach bolts in hard-to-access areas.

  • Allows for reaching deep-set bolts
  • Provides extra leverage
Learn more

Universal Joint

A universal joint allows for socket articulation to reach bolts at an angle.

  • Facilitates torque application at awkward angles
  • Enhances accessibility
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure (2.0L TFSI)

Proper tightening sequence and torque specifications for securing the cylinder head to the engine block on a 2.0L TFSI engine.

  • Clean cylinder head and engine block mating surfaces.
  • Install new cylinder head bolts.
  • Tighten bolts in sequence to 40 Nm.
  • Tighten bolts in sequence to 60 Nm.
  • Rotate bolts in sequence 90 degrees
  • Rotate bolts in sequence 90 degrees (second angle stage)
  • Check final tightening angles.
View full procedure

Intake Manifold Bolt Tightening Procedure (2.0L TFSI)

Proper tightening sequence and torque specifications for securing the intake manifold to the cylinder head on a 2.0L TFSI engine.

  • Clean intake manifold and cylinder head mating surfaces.
  • Install new intake manifold gasket.
  • Install bolts evenly by hand.
  • Tighten bolts in sequence to 10 Nm.
  • Tighten bolts in sequence to 20 Nm.
  • Check final tightening torques.
View full procedure

Oil Pan Bolt Tightening Procedure (2.0L TFSI)

Proper torque specifications for securing the oil pan to the engine block on a 2.0L TFSI engine.

  • Clean oil pan and engine block mating surfaces.
  • Install new oil pan gasket or sealant as per manufacturer.
  • Install bolts evenly by hand.
  • Tighten bolts in sequence to 25 Nm
  • Check final tightening torques
View full procedure

Camshaft Bearing Cap Bolt Tightening Procedure (2.0L TFSI)

Proper tightening sequence and torque specifications for securing the camshaft bearing caps on a 2.0L TFSI engine.

  • Clean bearing cap and cylinder head surfaces
  • Install new bearing cap bolts
  • Tighten all bolts to 10 Nm
  • Tighten all bolts in sequence to 20 Nm
  • Check final tightening torques.
View full procedure
Technical Service Bulletins

Revised Cylinder Head Bolt Torque Procedure

2019-07-15

A revised tightening sequence and torque specifications have been issued for cylinder head bolts due to concerns over head gasket failures on some 2.0L TFSI engines. This includes updated torque and angle specs.

2017-2018 Audi A4 (B9) 2.0L TFSI

Resolution: Use the new torque sequence and values as specified in the updated service manual.

Oil Pan Leaks on 2.0L TFSI Engines

2020-03-22

Reports of oil pan leaks on specific 2.0L TFSI engines after standard servicing are being observed, specifically related to improper sealant application. Proper sealant and torque is specified.

2017-2020 Audi A4 (B9) 2.0L TFSI

Resolution: Ensure proper cleaning and application of the updated sealant. Follow revised torque procedures

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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