Overview - Balance Shaft Drive Chain

Fig 1: Identifying Balance Shaft Drive Chain Overview

Courtesy of AUDI OF AMERICA, LLC

1. Guide Pin
   • Tightening specification: 20 Nm
2. Guide Rail
   • For the timing chain
3. Balance Shaft Drive Chain
   • Removing, refer to BALANCE SHAFT DRIVE CHAIN, REMOVING AND INSTALLING .
4. Guide Pin
   • Tightening specification: 20 Nm
5. Tensioning Rail
   • For balance shaft drive chain
6. Balance Shaft
   • Exhaust side
   • must be replaced after removing
   • Lubricate the bearing with engine oil
   • Replacing, refer to BALANCE SHAFT, REMOVING AND INSTALLING, EXHAUST SIDE .
7. Guide Pin
   • Tightening specification: 20 Nm
8. Guide Rail
   • For the timing chain
9. Chain Tensioner
   • Tightening specification: 85 Nm
   • Coat the seal with sealant
10. Three Stage Chain Sprocket
    • Installed position, refer to Figure
11. O-Ring
    • Lubricate with engine oil
12. Mounting Pin
    • Lubricate with engine oil
    • Installed position, refer to Fig 2
13. Intermediate Sprocket
    • The intermediate sprocket must be replaced if the bolt -item 15  - is loosened.
14. Washer
15. Bolt
    • Replacing
    • The intermediate sprocket -item 13  - must be replaced if the bolt is loosened.
    • Tightening sequence, refer to Fig 3

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

Fig 3: Identifying Intermediate Shaft Sprocket

Courtesy of AUDI OF AMERICA, LLC

-- Tighten with a new bolt as follows:

-- Tighten to 10 Nm using a torque wrench.

-- Turn the intermediate sprocket.

The intermediate sprocket must not have any play. Loosen and tighten it again if necessary.

-- Tighten to 25 Nm using a torque wrench.

-- Turn another 90° using a rigid wrench.