Overview - Balance Shaft Drive Chain

Fig 1: Balance Shaft Drive Chain Exploded View

Courtesy of AUDI OF AMERICA, LLC

1. Guide Pin
   • 20 Nm
2. Guide Rail
   • For the timing chain
3. Timing Chain
   • Removing. Refer to BALANCE SHAFT DRIVE CHAIN, REMOVING AND INSTALLING .
4. Guide Pin
   • 20 Nm
5. Tensioning Rail
   • For the drive chain for the balance shafts
6. 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 .
7. Guide Pin
   • 20 Nm
8. Guide Rail
   • For the timing chain
9. Chain Tensioner
   • 85 Nm
   • Coat the seal with sealant
10. Three Stage Chain Sprocket
    • Installation position. Refer to Figure.
11. O-ring
    • Lubricate with engine oil
12. Mounting Pin
    • Lubricate with engine oil
    • Installation position. Refer to  15.
13. Intermediate Sprocket
    • The intermediate sprocket must be replaced if the bolt -item 15-  OVERVIEW - BALANCE SHAFT DRIVE CHAIN is loosened.
14. Washer
15. 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

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

-- Tighten the bolt -1- in steps: