Overview - Balance Shaft Drive Chain

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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
- Always replace in pairs. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, EXHAUST SIDE .
- Exhaust side
- Lubricate the bearing with engine oil
Guide Pin
- 20 Nm
Guide Rail
- For the timing chain
Chain Tensioner
- 85 Nm
- Insert with locking fluid. Refer to the Parts Information.
Seal
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 ) OVERVIEW - BALANCE SHAFT DRIVE CHAIN - List Item: Bolt is loosened.
Thrust Washer
Bolt
- Tightening Specifications and Sequence. Refer to Fig 3.
- Always replace after removing.
- The intermediate sprocket -item ) OVERVIEW - BALANCE SHAFT DRIVE CHAIN - List 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
- Always replace in pairs. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, EXHAUST SIDE .
- Intake side
- Lubricate the bearing with engine oil
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

Replace and lubricate the O-ring -1-.
The alignment pin -arrow- for the bearing pins must engage in the hole in the cylinder block.
Lubricate the bearing pins

Intermediate Sprocket - Tightening Specifications and Sequence

Fig 3: Identifying Intermediate Shaft Sprocket

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Risk of damaging the engine due to an incorrect backlash.

- The intermediate sprocket must always be replaced, otherwise the backlash will incorrectly adjust itself.

Replace the 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