Audi Audi A4 2009-2016 2.0L Engine Bolt Torque Specifications & Fastener Values
Audi Audi A4 2009-2016

Audi Audi A4 2009-2016 2.0L Engine Bolt Torque Specifications

Comprehensive list of torque specifications for various bolts on the 2.0L engine found in the 2009-2016 Audi A4. Includes cylinder head, main bearing, rod bearing, and other critical 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

2.0l-engine Cylinder Head

Torque specifications for the cylinder head and related components.

1

Cylinder Head Bolts

M10 x 1.5
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Initial torque value. Additional torque angle sequence required; refer to factory service manual for specific steps. Torque-to-yield bolts, replace when removed.
2

Valve Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure rocker arms are properly seated before tightening. Tighten bolts in sequence.
4

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing.

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
Initial torque value. Additional torque angle sequence required; refer to factory service manual for specific steps. Torque-to-yield bolts, replace when removed.
2

Oil Pan Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing. Converted from inch-lbs to ft-lbs.
3

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure a new sealing washer is used.
4

Water Pump Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly.
5

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the o-ring seal is in good condition.

2.0l-engine Crankshaft

Torque specifications for crankshaft components.

1

Connecting Rod Nuts

M8 x 1.0
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Initial torque value. Additional torque angle sequence required; refer to factory service manual for specific steps. Torque-to-yield nuts, replace when removed.
2

Flywheel Bolts

M10 x 1.25
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Initial torque value. Additional torque angle sequence required; refer to factory service manual for specific steps. Torque-to-yield bolts, replace when removed.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 2.0
Torque Value
148 ft-lbs (200 N·m)
Important Notes
Ensure the pulley is properly seated on the crankshaft.

2.0l-engine Timing

Torque specifications for timing components.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure correct tensioner operation after tightening.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Ensure proper camshaft alignment before tightening.

2.0l-engine Intake

Torque specifications for intake components.

1

Intake Manifold Bolts

M6 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment before tightening.
3

EGR Valve Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure EGR valve is properly aligned
4

Fuel Rail Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly.
5

Fuel Injector Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure injectors are properly seated.
6

Fuel Injector Rail Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure the fuel rail is properly aligned.

2.0l-engine Cooling

Torque specifications for cooling components.

1

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to ensure a proper seal.

2.0l-engine Ignition

Torque specifications for ignition components.

1

Spark Plugs

M14 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper thread engagement and do not overtighten. Check spark plug gap.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure proper coil seating before tightening.

2.0l-engine Accessories

Torque specifications for accessory drive components.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure proper belt tensioner operation.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure pulley is seated correctly.

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 correct torque specifications important?

Correct torque specifications ensure proper clamping force on engine components. Over-tightening can damage threads, cause component failure, or distort parts, leading to leaks or engine damage. Under-tightening can result in loosening, vibration, and potential component detachment, which also poses a safety risk. For example, incorrectly torqued cylinder head bolts could cause a head gasket failure, leading to coolant leaks and engine overheating.

Q2

Should I use new bolts when reassembling engine components?

It is generally recommended to use new bolts, especially for critical components like the cylinder head, connecting rods, and main bearing caps. Many of these bolts are torque-to-yield (TTY) bolts, meaning they stretch upon tightening and are designed for single use. Reusing TTY bolts can lead to incorrect clamping force and potential component failure. For example, if you reused your old cylinder head bolts on a 2.0T, you risk compromising the sealing and compression, potentially resulting in severe issues.

Q3

What does 'Nm' mean in torque specifications?

'Nm' stands for Newton-meters, the standard unit of torque in the metric system. Torque is a rotational force. A torque wrench set to 25 Nm, means that it applies 25 Newtons of force at a distance of one meter from the axis of rotation. It's essential to use a torque wrench calibrated to Nm for accuracy when following specifications.

Q4

What is the difference between torque and torque-to-yield?

Torque is the twisting force applied. Torque-to-yield (TTY) bolts are tightened to a specific torque value and then tightened further by a specific angle. This stretching action creates optimal clamping force but renders the bolts unsuitable for reuse. They are commonly used for high-stress applications like cylinder heads. Not using new bolts after undoing them will create a risk of the bolts stretching and breaking upon re-tightening and cause failures.

Q5

Can I use an impact wrench to tighten engine bolts?

Using an impact wrench for tightening engine bolts is strongly discouraged. Impact wrenches provide uncontrolled and often excessive force, making it impossible to achieve accurate torque settings. This can lead to over-tightening and thread damage. Always use a calibrated torque wrench for tightening engine components. For example, using an impact gun on the oil pan bolts will result in leaks due to over tightening and gasket damage.

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 precise torque values to fasteners.

  • Wide torque range (e.g., 5-150 ft-lbs)
  • Audible click when torque is reached
  • 1/2 inch drive
Learn more

Torque Wrench (3/8 inch drive)

A smaller torque wrench for lower torque applications, such as valve cover bolts.

  • Lower torque range (e.g., 5-75 ft-lbs)
  • Audible click when torque is reached
  • 3/8 inch drive
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit various bolt heads on the 2.0L engine.

  • Various sizes (e.g., 8mm, 10mm, 13mm, 16mm, 17mm, 18mm)
  • 6-point sockets for better grip
  • Both standard and deep sockets
Learn more

Extension Bars (Various Lengths)

Extension bars to provide access to hard-to-reach bolts on the engine.

  • Multiple lengths (e.g., 3 inch, 6 inch, 10 inch)
  • 1/2 inch drive and 3/8 drive options
  • Durable steel construction
Learn more

Universal Joint Adapter

Universal joint adapter to reach angled bolts.

  • 1/2 inch and 3/8 inch drive options
  • Durable steel construction
  • Allows for angled application of torque
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Procedure for tightening cylinder head bolts on the 2.0L TFSI engine, including sequence and torque specifications.

  • Clean the cylinder head and block mating surfaces.
  • Install new cylinder head bolts.
  • Tighten all bolts to 40 Nm (29 ft-lbs) in the specified sequence.
  • Tighten all bolts to 60 Nm (44 ft-lbs) in the same sequence.
  • Tighten all bolts by an additional 90 degrees in the same sequence.
  • Tighten all bolts by an additional 90 degrees in the same sequence.
View full procedure

Camshaft Bearing Cap Bolt Torque Procedure

Procedure for torquing camshaft bearing cap bolts.

  • Clean the camshaft bearing caps and cylinder head mating surfaces.
  • Install camshaft bearing caps with new bolts.
  • Torque all bolts to 10 Nm (7 ft-lbs) + an additional 90 degrees in specified sequence.
View full procedure

Main Bearing Cap Bolt Torque Procedure

Procedure for tightening main bearing cap bolts.

  • Clean the main bearing caps and block mating surfaces.
  • Install main bearing caps with new bolts.
  • Torque all bolts to 30 Nm (22 ft-lbs) + an additional 90 degrees in specified sequence.
View full procedure

Intake Manifold Bolt Torque Procedure

Procedure for tightening intake manifold bolts on the 2.0L TFSI engine.

  • Install the intake manifold.
  • Torque all bolts to 10 Nm (7 ft-lbs) in a crisscross sequence.
View full procedure

Exhaust Manifold Bolt Torque Procedure

Procedure for torquing exhaust manifold bolts on the 2.0L TFSI engine.

  • Install exhaust manifold with new gasket.
  • Torque all bolts to 25 Nm (18 ft-lbs) in a crisscross sequence.
View full procedure

Valve Cover Bolt Torque Procedure

Procedure for tightening valve cover bolts.

  • Install new valve cover gasket.
  • Install valve cover.
  • Torque all bolts to 10 Nm (7 ft-lbs) in a crisscross sequence.
View full procedure

Oil Pan Bolt Torque Procedure

Procedure for tightening oil pan bolts.

  • Install new oil pan gasket.
  • Install oil pan.
  • Torque all bolts to 15 Nm (11 ft-lbs) in a crisscross sequence.
View full procedure
Technical Service Bulletins

Engine Oil Consumption Issue on 2.0L TFSI Engines

2014-03-15

Addresses excessive oil consumption issues related to piston ring wear on specific 2.0L TFSI engines. Includes updated piston design and torque specifications.

2009-2012

Resolution: Replace pistons and rings with updated design. Use specified torque for fasteners during reassembly.

Camshaft Adjuster Bolt Failure

2013-07-22

Potential for camshaft adjuster bolt to fail. Revised tightening procedure and bolt type are required

2010-2013

Resolution: Replace camshaft adjuster bolts with specified new bolts and apply specified torque values when assembling.

High Pressure Fuel Pump Bolt Issue

2015-08-10

Issue related to bolts used in the High Pressure Fuel Pump. Incorrect torque can result in failure.

2012-2016

Resolution: Replace bolts and use correct torque specification. Check and torque per spec on any removed HFP.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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