Timing Chain Covers Overview

Fig 1: Identifying Timing Chain Cover And Sealing Flange

Courtesy of AUDI OF AMERICA, LLC

1. Shaft Seal
   • For the crankshaft.
   • Replacing, refer to CRANKSHAFT SEAL, REMOVING AND INSTALLING .
2. Lower Timing Chain Cover
   • Removing and Installing, refer to LOWER TIMING CHAIN COVER, REMOVING AND INSTALLING .
3. Bolt
   • Tightening sequence, refer to Fig 2.
4. Bolt
   • 9 Nm
   • Tighten diagonally in steps.
5. Seal
   • Quantity: 2
   • For the Camshaft Adjustment Valve 1 -N205- and Exhaust Camshaft Adjustment Valve 1 -N318-
   • Replace if leaking or damaged.
   • Replacing, refer to TIMING CHAIN UPPER COVER SEAL, REMOVING AND INSTALLING .
6. Bolt
   • 9 Nm
7. Camshaft Position Sensor
   • Camshaft Position Sensor -G40- and Camshaft Position Sensor 2 -G163-
8. O-Ring
   • Quantity: 2
   • Replace
9. Alignment Sleeve
   • Quantity: 2
10. Timing Chain Cover Upper Section
    • Removing and Installing, refer to TIMING CHAIN GUARD UPPER SECTION, REMOVING AND INSTALLING .
    • The version for vehicles without the mechanical vacuum pump is shown.
    • Version for vehicles with mechanical vacuum pump, refer to MECHANICAL VACUUM PUMP OVERVIEW .
11. Cylinder Head Gasket
    • Clean holes and fill with sealant, refer to LOWER TIMING CHAIN COVER, REMOVING AND INSTALLING .
12. Guide Pin
13. Bolt
    • Tightening sequence, refer to Fig 2.

Fig 2: Identifying Sealing Flange Bolts

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in 3 steps as follows:

-- Tighten the bolts -1- to 5 Nm.

-- Tighten the bolts -2- to 23 Nm.

-- Tighten the bolts -1- to 9 Nm.