Overview - Camshaft Housing

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Fig 1: Exploded View Of Camshaft Housing

Courtesy of AUDI OF AMERICA, LLC

Bearing Cap
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Pay attention to the camshaft housing pairing number and bearing cap. Refer to Fig 6.
Alignment Sleeves
Axial Bearing
Seal
- Replace after removing
Plugs
- Replace after removing
Bolt
- Tightening specification. Refer to OVERVIEW - VACUUM PUMP (4M) , OVERVIEW - VACUUM PUMP (4MN) .
Bracket
- For the lines
- There are different versions. Refer to the appropriate Electronic Parts Information.
Bolt
- Tightening specification. Refer to OVERVIEW - VACUUM PUMP (4M) , OVERVIEW - VACUUM PUMP (4MN) .
Bolt
- Tightening Specifications and Sequence:
  - Cylinder bank 1 (right). Refer to Fig 2.
  - Cylinder bank 2 (left). Refer to Fig 3.
Bolt
- 9 Nm
Ball Pin
- 9 Nm
Heat Shield
Bolt
- 5 Nm
Cam Actuator
- Removing and Installing. Refer to CAM ACTUATOR, REMOVING AND INSTALLING .
O-Ring
- Included in a delivery package OVERVIEW - CAMSHAFT HOUSING, cannot be delivered separately
- coat with engine oil
- Check for damage
Connection
Bolt
- Tightening specification. Refer to .
Camshaft Housing
- Shown for cylinder bank 2 (left)
- Removing and Installing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
- Pay attention to the camshaft housing pairing number and bearing cap. Refer to Fig 6.
- Pay attention to the camshaft housing pairing number and cylinder head. Refer to Fig 5.
O-Ring
- Replace after removing
Choke Valve
- For the oil separator
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
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
Alignment Sleeves
Bearing Cap
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Pay attention to the camshaft housing pairing number and bearing cap. Refer to Fig 6.
Bolts
- Replace after removing
- Tightening Specifications and Sequence. Refer to Fig 4.

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

These multiple tightenings to 9 Nm take into account the shrinkage of the components.

-- Tighten the bolts in steps as shown:

Step	Bolts	Tightening Specification
1.	-1 through 24-	Install all the way by hand The camshaft housing contact surface must lay entirely on top of the cylinder head
2.	-1 through 24-	9 Nm
3.	-1 through 24-	9 Nm

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

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

Courtesy of AUDI OF AMERICA, LLC

These multiple tightenings to 9 Nm take into account the shrinkage of the components.

-- Tighten the bolts in steps as shown:

Step	Bolts	Tightening Specification
1.	-1 through 24-	Install all the way by hand The camshaft housing contact surface must lay entirely on top of the cylinder head
2.	-1 through 24-	9 Nm
3.	-1 through 24-	9 Nm

Camshafts bearing cap - tightening specification and sequence

Fig 4: Camshafts Bearing Cap - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

Cylinder bank 1 (right) is shown.

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

-- Tighten the bolts in steps as shown:

Exhaust camshaft -6-

Step	Bolts	Tightening specification/additional turn
1.	-1 through 5-	Install all the way by hand The bearing cap must contact the entire contact surface of the camshaft housing.
2.	-1 through 5-	3 Nm
3.	-1 through 5-	30° additional turn

Intake camshaft -7-

Step	Bolts	Tightening specification/additional turn
1.	-8 through 12-	Install all the way by hand The bearing cap must contact the entire contact surface of the camshaft housing.
2.	-8 through 12-	3 Nm
3.	-8 through 12-	30° additional turn

Camshaft housing and cylinder head pairing number

Fig 5: Camshaft Housing and Cylinder Head Pairing Number

Courtesy of AUDI OF AMERICA, LLC

Shown on the cylinder bank 2 (left).

Both four digit numbers must align: XXXX = XXXX.
Each camshaft housing is assigned to a cylinder head with this pairing number.
For the assembly pay attention to the correct allocation.

Bearing cap and camshaft housing pairing number

Fig 6: Bearing Cap and Camshaft Housing Pairing Number

Courtesy of AUDI OF AMERICA, LLC

Shown on the cylinder bank 2 (left).

The three digit numbers -2- on the bearing cap -arrows- must align with the last three digits of the four digit number -1- on the camshaft housing.
Each bearing cap is assigned to a camshaft housing with this pairing number.
For the assembly pay attention to the correct allocation.

Plug - Tightening Specification

Fig 7: Plug - Tightening Specification

Courtesy of AUDI OF AMERICA, LLC

Component Location: in Cylinder Bank 1 (Right) Camshaft Housing

-- Tighten the plug -arrow- with a new seal to 15 Nm. (Shown on Audi A8).