Left Timing Chain Cover

Left Timing Chain Cover

Special tools, testers and auxiliary items required

• Hand drill with plastic brush attachment

• Protective eyewear

• Sealant

Removing

• During installation, all cable ties must be installed at the same location.

- Remove the engine compartment crossmember: R8 Coupe => [ Engine Compartment Crossmember ] Engine Assembly

- Remove electrical connectors from bracket and disconnect:





1. For oxygen sensor 2 after catalytic converter (G131)

2. For heated oxygen sensor 2 (G108)

- Free up the wires to the oxygen sensors.

- Remove the clamp screw - 2 -.





• Ignore - 1 -.

- Remove the clamp screw - 1 -.





- Loosen the hose clamp, disconnect the vacuum line - 2 - and move it to the side.

- Disconnect vacuum hose - 2 -.





- Remove the bolts - 1 - and move the secondary air injection left combination valve to the side.

- Remove bolts - 1 to 8 -.





• Due to the difficult accessibility, the bolt - 1 - can only be removed with pliers.

- Remove the bracket - arrow A - and - arrow B -.

- Remove the timing chain left cover from the bond.

Installing

CAUTION!
Risk of contaminating lubricating system.

• Cover open parts of engine.

CAUTION!
Risk of eye injury.

• Wear safety glasses.

- Remove the sealant residue on the cover for the timing chain, cylinder block and cylinder head, for example using a rotating plastic brush.





- Clean the sealing surfaces; they must be free of oil and grease.

• Note the expiration date of the sealing compound.

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





CAUTION!
The lubrication system could be plugged with excess sealant.

• Do not apply sealant bead thicker than indicated.

- Apply a sealant bead - arrow - to the clean sealing surface of the timing chain left cover as shown in the illustration.





• Sealant bead thickness: 2.5 mm

• The timing chain cover must be installed within 5 minutes after applying the sealant

- Position the timing chain left cover and the bracket - arrow A - and - arrow B -.





- Replace the bolt - 6 - with a hex collar bolt.

- Tighten the bolts => [ Left Timing Chain Cover, Tightening
Specifications and Sequence ] Timing Chain Covers Assembly Overview.

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

- Install the left secondary air injection combination valve. Refer to => [ Secondary Air Injection Left Combination Valve ] Secondary Air Injection Left Combination Valve.

- Install the engine compartment crossmember: R8 Coupe => [ Engine Compartment Crossmember ] Engine Assembly.