Upper Timing Chain Cover

Upper Timing Chain Cover

Special tools, testers and auxiliary items required

• Hand drill with plastic brush attachment

• Protective glasses

• Sealant

Removing

- Remove intake manifold

- Remove cylinder head cover => [ Cylinder Head Cover ] Service and Repair.

- If present, remove mechanical vacuum pump => [ Mechanical Vacuum Pump ] Mechanical Vacuum Pump.

- Disconnect electrical connector - arrow - on after-run coolant pump (V51).





- Remove bolts - 1 -.

• Ignore - 2 and 3 -.

- Mark and disconnect electrical connectors:





1. Camshaft Position (CMP) sensor (G40)

2. Camshaft adjustment valve 1 (N205)

3. Camshaft adjustment valve 1 (exhaust) (N318)

4. Camshaft Position (CMP) sensor 2 (G163)

- Free up electrical wiring on timing chain upper cover.

- Remove bolts - arrows - and remove timing chain upper cover.





• Ignore - 1 -.

• The illustration shows the version for vehicles without the mechanical vacuum pump.

Installing

• Tightening specifications => [ Timing Chain Covers, Assembly Overview ] Timing Chain Covers, Assembly Overview.

Risk of eye injury.

• Wear safety glasses.

Risk of contaminating lubrication system with sealant residue.

• Place a clean cloth over open part of engine.

- Remove remaining sealant on upper timing chain and cylinder head covers, e.g, with a rotating plastic brush.





- Clean sealing surfaces, must be free of oil and grease.

- Cut tube nozzle at front marking (dia. approximately 2 mm).





- Check whether timing chain upper cover fitting sleeves are installed in cylinder head.





- Lightly coat sealing surface - shaded - on timing chain upper cover with sealant.

• Timing chain upper cover must be installed with 5 minutes of applying sealant.

- Tighten timing chain upper cover bolts - arrows - diagonally in stages.





• Ignore - 1 -.

• The illustration shows the version for vehicles without the mechanical vacuum pump.

The rest of installation is in reverse order of removal, note the following:

- Install vacuum pump on vehicles with mechanical vacuum pump => [ Mechanical Vacuum Pump ] Mechanical Vacuum Pump.

- Install after-run coolant pump (V51) => [ After-Run Coolant Pump ] Service and Repair.

- Install cylinder head cover => [ Cylinder Head Cover ] Service and Repair

- Install intake manifold