Overview - Timing Chain Cover, Engine With Two Camshaft Adjusters

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Fig 1: Exploded View Of Timing Chain Cover (Engine With Two Camshaft Adjusters)

Courtesy of AUDI OF AMERICA, LLC

Bolts
- Tightening Specifications:
  - Steel bolt 9 Nm
  - Aluminum bolt 4 Nm +45°
- Aluminum bolt: Always replace after removal
Exhaust Camshaft Adjustment Valve 1 -N318-
- Always replace the O-ring, refer to -item 9-.
- Removing and installing. Refer to CAMSHAFT ADJUSTMENT VALVE 1 -N205-, REMOVING AND INSTALLING .
Seals
- Always replace after removing
- Coat with oil before assembly
Upper Timing Chain Cover
- Removing and installing. Refer to TIMING CHAIN COVER, REMOVING AND INSTALLING, ENGINE WITH TWO CAMSHAFT ADJUSTERS .
Seal
- Always replace if damaged
Cap
Bolt
- Tightening sequence. Refer to Fig 2.
Seal
- Always replace if damaged
O-ring
- Always replace after removing
- Coat with oil before assembly
Not Installed
Engine
Alignment Pins
- Centering the cover
Lower Timing Chain Cover
- With gasket
- Replacing. Refer to LOWER TIMING CHAIN COVER, REPLACING .
Seal
- For the vibration damper
- Replacing. Refer to VIBRATION DAMPER SEAL, REPLACING .
Plugs
- Always replace after removing
Bolt
- Tightening specifications and sequence
  - With 15 bolts. Refer to Fig 3.
  - With 8 bolts. Refer to Fig 4.
- Always replace after removing
O-ring
- Always replace after removing
- Coat with oil before assembly
Oil Dipstick Tube
Bolt
- 9 Nm
Camshaft Adjustment Valve 1 -N205-
- Always replace the O-ring, refer to -item 9-.
- Removing and installing. Refer to CAMSHAFT ADJUSTMENT VALVE 1 -N205-, REMOVING AND INSTALLING .

Fig 2: Upper Timing Chain Cover Bolts Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts -1 to 6- in the sequence shown to 9 Nm.

Fig 3: Lower Timing Chain Cover Bolts - Tightening Sequence (15 Bolts)

Courtesy of AUDI OF AMERICA, LLC

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

-- Tighten The Bolts In The Steps Shown In The Sequence (15 Bolt):

Step	Bolts	Tightening Specification/Additional Turn
1.	-1 to 15-	Install by hand all the way
2.	-1 to 15-	8 Nm
3.	-1, 2, 4, 5- and -7 to 15-	45° additional turn
4.	-3 and 6-	After installation of the vibration damper a 45° additional turn

Fig 4: Lower Timing Chain Cover Bolts - Tightening Sequence (8 Bolts)

Courtesy of AUDI OF AMERICA, LLC

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

-- Tighten The Bolts In The Steps Shown In The Sequence (8 Bolt):

Step	Bolts	Tightening specification/additional turn
1.	-1 to 8-	Install by hand all the way
2.	-1 to 8-	8 Nm
3.	-2 and 3- and -5 to 8-	45° additional turn
4.	-1 and 4-	After installation of the vibration damper a 45° additional turn