Variable Valve Timing Cover / Housing: Service and Repair

Control Housing Cover

Special tools, testers and auxiliary items required

• Torque wrench 5-50 Nm (VAG 1331)

• Torque wrench 40-200 Nm (VAG 1332)

• Hand drill with plastic brush attachment

• Protective eyewear

• Silicone sealant (D 174 003 A2)

Removing

• Engine removed, transmission separated from flange

- Remove the chain compartment cover. Refer to --> [ Chain Compartment Cover ] Service and Repair.

- Remove the flywheel or drive plate and remove the sensor wheel for the Engine Speed (RPM) sensor from the crankshaft.

- Remove the cylinder head. Refer to --> [ Cylinder Head ] Cylinder Head.

- Disengage the wiring harness - arrow - and remove the Engine Speed (RPM) sensor - 1 - and vacuum pump - 2 -.





- Remove the bolts - 3 -.

- Pry off the control housing cover - 1 - from the cylinder block - 2 - and from the upper section of oil pan - 3 - at the positions designated at the top and bottom using a suitable screwdriver - A -.





Start in the area of the alignment sleeves - arrows -.

• Make sure the sealing surfaces are not damaged.

- Drive out the seal with the control housing cover removed.

Installing

CAUTION!
To prevent injuries from shavings, wear protective goggles and protective clothing.

- Remove the remainder of the sealant from the cylinder block, upper section of the oil pan and control housing cover e.g. using a rotating plastic brush.

CAUTION!
Make sure that no sealant residue enters the engine.

- Clean the sealing surfaces of the cylinder block, upper section of oil pan and control housing cover, they must be free of oil and grease.

- Replace the seals - 1 - and - 2 -.





- Cut the tube nozzle at the front marking (diameter of nozzle approximately 1 mm).





• The control housing cover must be installed within 5 minutes after application of sealant.

- Apply a sealant bead - A - onto the control housing cover as depicted.





• The sealant bead must be 1.5 to 2.0 mm thick.

• Pay special attention to the course of the sealant bead in area - arrow -.

- Attach the control housing cover so that alignment sleeves engage in the bores in the cylinder block.

- Install all bolts hand tight.

- Tighten all the bolts - 3 - in the cylinder block and in the upper section of the oil pan to 10 Nm.





- Then, tighten the bolts in the cylinder block and in the upper section of the oil pan to 25 Nm.

- Wipe off any excess sealant, which has leaked out.

- Drive the alignment sleeves in until seated if necessary.

- Install a new seal. Refer to --> [ Crankshaft Seal, Transmission Side ] Crankshaft Seal, Transmission Side.

The rest of the installation follows the reverse of the removal procedures. When doing this note the following:

• Install the brake booster vacuum pump. Refer to --> [ Brake Booster Vacuum Pump ] Brake Booster Vacuum Pump.

• Install the cylinder head. Refer to --> [ Cylinder Head ] Cylinder Head.

• Install the drive plate. Refer to --> [ Drive Plate ] Drive Plate.

• Remove the (T40069) from the cylinder block and install the locking bolt.

• Fill the cooling system. Refer to --> [ Draining and Filling ] [1][2]Cooling System, Draining and Filling.

Tightening Specifications