Overview - Camshaft Housing

WARNING: This page is about a different car, the 2024 Audi A8 Quattro, 2023 Audi A8 Quattro, and 2022 Audi A8 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of Camshaft Housing

Courtesy of AUDI OF AMERICA, LLC

Bolt
- 9 Nm
- Replace after removing
Bearing Cap
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Note the installation position
Alignment Sleeves
Exhaust Camshaft
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Axial play, measuring. Refer to CAMSHAFT, MEASURING AXIAL CLEARANCE .
- Radial play, measuring. Refer to CAMSHAFT, MEASURING RADIAL CLEARANCE .
- Maximum run out: 0.04 mm
Check Valve
- For the oil separator
O-Ring
- Replace after removing
Seal
- Replace after removing
Bolt
- 9 Nm
Plugs
O-Ring
- Replace after removing
Camshaft Housing
- Shown for cylinder bank 2 (left)
- Removing and Installing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
Bolt
- Replace after removing
- Tightening Specifications and Sequence:
  - Cylinder bank 1 (right). Refer to Fig 2.
  - Cylinder bank 2 (left). Refer to Fig 3.
Plug
- 5 Nm +90°
- Replace after removing
Seal
- Replace after removing
Restrictor
- Cylinder bank I 20 Nm
- Cylinder bank II 15 Nm
O-Ring
- Replace after removing
Plug
- 25 Nm
Bolt
- 3 Nm +90°
- Replace after removing
Cam Actuator
- Removing and Installing. Refer to CAM ACTUATOR, REMOVING AND INSTALLING .
O-Ring
- Not available separately; replace if leaking -item : Cam Actuator or damaged
- Coat with engine oil
- Check for damage
Plug
- 5 Nm +90°
- Replace after removing
Seal
- Replace after removing
Compression Rings
Friction Bearing
- The friction bearing is installed depending on the version. For allocation. Refer to the Electronic Parts Information (ETKA).
- For the intake camshaft
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
Compression Rings
Axial Bearing
Intake Camshaft
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Axial play, measuring. Refer to CAMSHAFT, MEASURING AXIAL CLEARANCE .
- Radial play, measuring. Refer to CAMSHAFT, MEASURING RADIAL CLEARANCE .
- Maximum run out: 0.04 mm

Cylinder Bank 1 (Right) Camshaft Housing - Tightening Specification and Sequence

Fig 2: Cylinder Bank 1 (Right) Camshaft Housing - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

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

-- Tighten the bolts in the steps in the sequence shown:

Step	Bolts	Tightening Specification/Additional Turn
1.	-1 to 20-	Install all the way by hand The camshaft housing contact surface must lay entirely on top of the cylinder head
2.	-1 to 20-	8 Nm
3.	-1 to 20-	90° additional turn

Cylinder Bank 2 (Left) Camshaft Housing - Tightening Specification and Sequence

Fig 3: Cylinder Bank 2 (Left) Camshaft Housing - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

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

-- Tighten the bolts in the steps in the sequence shown:

Step	Bolts	Tightening Specification/Additional Turn
1.	-1 to 19-	Install all the way by hand The camshaft housing contact surface must lay entirely on top of the cylinder head
2.	-1 to 19-	8 Nm
3.	-1 to 19-	90° additional turn