Overview - Balance Shaft Drive Chain

• 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

1. Guide Pin
   • 20 Nm
2. Tensioning Rail
   • For the timing chain
3. Balance Shaft
   • Exhaust side
   • Lubricate the bearing with engine oil
   • Replace in pairs only. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, EXHAUST SIDE .
4. Guide Pin
   • 20 Nm
5. Guide Rail
   • For the timing chain
6. Chain Tensioner
   • 85 Nm
   • Insert with locking fluid. Refer to the Parts Information.
7. Seal
8. Cylinder Block
9. O-Ring
   • Lubricate with engine oil
10. Mounting Pin
    • Lubricate with engine oil
    • Installation position. Refer to Fig 2.
11. Intermediate Sprocket
    • The intermediate sprocket must be replaced if the bolt -item  ) Bolt is loosened.
12. Thrust Washer
13. Bolt
    • Tightening sequence. Refer to Fig 3.
    • Replace after removing.
    • The intermediate sprocket -item  ) Intermediate Sprocket must be replaced if the bolt is loosened.
14. Guide Rail
    • For the balance shaft timing chain
15. Guide Pin
    • 20 Nm
16. Balance Shaft
    • Intake side
    • Lubricate the bearing with engine oil
    • Replace in pairs only. Refer to BALANCE SHAFT, REMOVING AND INSTALLING, INTAKE SIDE .
17. Three Stage Chain Sprocket
    • Installation position. Refer to Figure.
18. Balance Shaft Drive Chain
    • Removing. 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 the bolts that were tightened with an additional turn after removing them.

-- Tighten the bolt -1- in steps: