Overview - Balance Shaft Drive Chain

WARNING: This page is about a different car, the 2018 Audi Q3 Quattro, 2018 Audi Q3, 2017 Audi Q3 Quattro, and 2017 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Balance Shaft Drive Chain Exploded View

Courtesy of AUDI OF AMERICA, LLC

Guide Pin
- 20 Nm
Guide Rail
- For the timing chain
Timing Chain
- Removing. Refer to BALANCE SHAFT DRIVE CHAIN, REMOVING AND INSTALLING .
Guide Pin
- 20 Nm
Tensioning Rail
- For the drive chain for the balance shafts
Balance Shaft
- Must be replaced after removing
- Exhaust side
- Lubricate the bearing with engine oil
- Replacing. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, EXHAUST SIDE .
Guide Pin
- 20 Nm
Guide Rail
- For the timing chain
Chain Tensioner
- 85 Nm
- Coat the seal with sealant
Three Stage Chain Sprocket
- Installation position. Refer to Figure.
O-ring
- Lubricate with engine oil
Mounting Pin
- Lubricate with engine oil
- Installation position. Refer to 15.
Intermediate Sprocket
- The intermediate sprocket must be replaced if the bolt -item 15- OVERVIEW - BALANCE SHAFT DRIVE CHAIN is loosened.
Washer
Bolt
- Tightening sequence. Refer to the illustration below.
- Always replace after removing.
- The intermediate sprocket -item 13- OVERVIEW - BALANCE SHAFT DRIVE CHAIN must be replaced if the bolt is loosened.

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

CAUTION:

- 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