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Home >> Audi >> 2012 >> A7 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 3.0L - Cylinder Head & VALVETRAIN - Engine Code(S): CGXB & CTUA >> 15 Cylinder Head, VALVETRAIN >> Timing Chain Cover >> Overview - Timing Chain Cover

Overview - Timing Chain Cover

Fig 1: Identifying Timing Chain Covers Overview
GWWA15-10960Courtesy of AUDI OF AMERICA, LLC
  1. Bolt
    • Replacing
    • Tightening specification and sequence, refer to Fig 4.
  2. Shaft Seal
  3. Bolt
    • Replacing
    • Tightening specification and sequence, refer to Fig 4.
  4. Alignment Sleeve
    • Quantity: 2
  5. Threaded Pin
    • Tightening specification, refer to Fig 4.
  6. Left Cylinder Head Gasket
  7. Bolt
    • Replacing
    • Tightening specification and sequence, refer to Fig 2.
  8. Bracket
    • For heat shield
  9. Left Timing Chain Cover
  10. Bracket
    • For wiring harness
  11. Bolt
    • Replacing
    • Tightening specification and sequence, refer to Fig 2.
  12. Bracket
    • for the left oxygen sensors electrical connectors
  13. Bolt
    • Tightening specification and sequence, refer to Fig 2.
  14. Seals
    • Replacing
  15. Bracket
    • for the right oxygen sensors electrical connectors
  16. Bolt
    • Tightening specification and sequence, refer to Fig 2.
  17. Bolt
    • Tightening specification and sequence, refer to Fig 3.
  18. Bracket
    • For the connectors
  19. Right Timing Chain Cover
  20. Right Cylinder Head Gasket
  21. Bracket
    • For heat shield
  22. Bolt
    • Replacing
    • Tightening specification and sequence, refer to Fig 3.
  23. Alignment Sleeve
    • Quantity: 2
  24. Bolt
    • Tightening specification and sequence, refer to Fig 4.
  25. Lower Timing Chain Cover
  26. Engine Speed Sensor -G28-
  27. Bolt
Fig 2: Identifying Left Timing Chain Cover Bolt, Tightening/Loosening Sequence
GWWA15-10921Courtesy of AUDI OF AMERICA, LLC
NOTE:

Replace any bolts that were tightened with an additional turn.

The brackets -arrows A and B- are connected with the left timing chain cover.

-- Tighten the bolts in two steps in the sequence shown.

Step Bolts Tightening specification/additional turn
1. -1 to 8- 5 Nm
2. -1 to 8- Tighten an additional 90°
Fig 3: Identifying Right Timing Chain Cover, Tightening Specifications and Sequence
GWWA15-10922Courtesy of AUDI OF AMERICA, LLC
NOTE:

Replace any bolts that were tightened with an additional turn.

The brackets -arrows A and B- are attached to the right timing chain cover.

-- Tighten the bolts in two steps in the sequence shown.

Step Bolts Tightening specification/additional turn
1. -1 to 8- 5 Nm
2. -1 to 8- Tighten an additional 90°
Fig 4: Identifying Lower Timing Chain Cover Bolt, Tightening Sequence
GWWA15-10503Courtesy of AUDI OF AMERICA, LLC
NOTE:

Replace any bolts that were tightened with an additional turn.

-- Tighten bolts in stages as follows:

Step Bolts Tightening specification/additional turn
1. -Arrows- 3 Nm
2. -1 through 10- 3 Nm diagonally
3. -1, 2, 4, 5 and 7- Tighten an additional 90°
4. -Arrows- 9 Nm
5. -8, 9 and 10- 8 Nm
6. -8, 9 and 10- Tighten an additional 90°
7. -3- 16 Nm
8. -6- 20 Nm
9. -6- 180° additional turn