Overview - Balance Shaft Drive Chain

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After removing or replacing the chain drive components the adaptation values for the chain length must be adapted again. Use the Vehicle Diagnostic Tester 01 - Engine electronics, functions , 01 - Chain length diagnostic adaptation .

Fig 1: Exploded View Of Balance Shaft Drive Chain

Courtesy of AUDI OF AMERICA, LLC

Guide Pin
- 20 Nm
Tensioning Rail
- For the timing chain
Balance Shaft
- Exhaust side
- Lubricate the bearing with engine oil
- Replace in pairs only. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, EXHAUST SIDE .
Guide Pin
- 20 Nm
Guide Rail
- For the timing chain
Chain Tensioner
- 85 Nm
- Replace after removing
Seal
- Not available separately, in the chain tensioner delivery package -item : Chain Tensioner
Cylinder Block
O-Ring
- Lubricate with engine oil
Mounting Pin
- Lubricate with engine oil
- Installation position. Refer to Fig 2.
Intermediate Sprocket
- The intermediate sprocket must be replaced if the bolt -item : Bolt is loosened.
Thrust Washer
Bolt
- Tightening sequence. Refer to Fig 3.
- Replace after removing
- The intermediate sprocket -item : Intermediate Sprocket must be replaced if the bolt is loosened.
Guide Rail
- For the balance shaft timing chain
Guide Pin
- 20 Nm
Balance Shaft
- Intake side
- Lubricate the bearing with engine oil
- Replace in pairs only. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, INTAKE SIDE .
Three Stage Chain Sprocket
- Installation position. Refer to Figure.
Balance Shaft Drive Chain
- Removing and Installing. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .

Mounting Pins - Installation Position

Fig 2: Bearing Pins Installation Position

Courtesy of AUDI OF AMERICA, LLC

-- Coat the new O-ring -1- before installing with engine oil.

The alignment pin -arrow- for the bearing pins must engage in the hole in the cylinder block.

-- Coat the bearing pin with engine oil.

Intermediate Sprocket - Tightening Specifications and Sequence

Fig 3: Identifying Intermediate Shaft Sprocket

Courtesy of AUDI OF AMERICA, LLC

Replace bolts that were tightened with an additional turn after removing them.

-- Tighten the bolt -1- in steps:

Step	Tightening Specification/Additional Turn
1.	10 Nm
2.	-- Turn the intermediate sprocket The intermediate sprocket must not have any play otherwise loosen and tighten it again.
3.	25 Nm
4.	90° additional turn