Left and Right Timing Chain Covers

Left and Right Timing Chain Covers

Special tools, testers and auxiliary items required

• Hand drill with plastic brush attachment

• Protective eyewear

• Sealant

Removing

• Engine/transmission assembly removed and mounted on Scissor Lift Platform (VAS 6131 A).

• During installation, reinstall all heat insulation sleeves and heat shields at the same locations.

• All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.

- Remove bolts - 2 - and - 3 - and remove oil dipstick guide tube upward.





- Remove the bolts - 4 - and - 5 -.

- Slide heat insulation sleeve over left coolant connection hose to side.

- Loosen hose clips - 1 - and - 7 -.

- Remove left coolant pipe from coolant hoses.

• Ignore - 6 -.

- Remove bolts - 1 - and - 2 -.





- Lay aside air guide pipe to secondary air injection combination valves.

• Ignore - 3 -.

- Remove bolts - 3 - and - 4 -.





- Slide heat insulation sleeve over right coolant connection hose to side.

- Loosen hose clamp - 1 -.

- Remove right coolant pipe from coolant connection hose.

• Ignore - 2 - and - 5 -.

- Remove nuts - 2 - and remove wiring harness bracket from rear coolant pipe.





- Disconnect electrical connector - 3 - on Engine Coolant Temperature (ECT) Sensor (G62).

- Remove electrical connectors - 1 - and - 4 - from bracket at rear coolant pipe.

- Remove bolts - 1 to 4 -.





- Remove rear coolant pipe and secondary air injection combination valves.

- Remove the bolts - 1 through 8 - and then carefully remove the left cover for the timing chain from the bond.





- Remove the bolts - 1 through 8 - and then carefully remove the right cover for the timing chain from the bond.





Installing

• Replace O-rings.

• Secure all hose connections with hose clamps appropriate for the model.

• During installation, reinstall all heat insulation sleeves and heat shields at the same locations.

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

CAUTION!
Wear safety glasses.

- Remove sealant residue on timing chain covers and cylinder head, for example, with a rotating plastic brush.





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

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

• Note the expiration date of the sealing compound.

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





- Drive left coolant intermediate pipe - 2 - out of left timing chain cover with a suitable drift.





- Replace O-rings - 1 - at coolant intermediate pipe.

- Insert coolant intermediate pipe in left timing chain cover.

- Apply sealant bead - arrow - on clean sealing surfaces of left timing chain cover, as shown in illustration.

• Thickness of sealant bead: 2.5 mm.

• Covers for timing chain must be installed within 5 minutes after applying sealant.

- Position left timing chain cover and tighten bolts in sequence - 1 to 8 -.





- Drive right coolant intermediate pipe - 2 - out of right timing chain cover with a suitable drift.





- Replace O-rings - 1 - at coolant intermediate pipe.

- Insert coolant intermediate pipe in right timing chain cover.

- Apply sealant bead - arrows - on clean sealing surfaces of right timing chain cover, as shown in illustration.

• Thickness of sealant bead: 2.5 mm.

- Position right timing chain cover and tighten bolts in sequence - 1 to 8 -.





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

- Install combination valve for Secondary Air Injection (AIR) system. Refer to: Left => [ Left Combination Valve for Secondary Air Injection ] Left Combination Valve for Secondary Air Injection, right => [ Right Combination Valve for Secondary Air Injection ] Right Combination Valve for Secondary Air Injection.

- Install rear coolant pipe. Refer to => [ Rear Coolant Pipe ] Rear Coolant Pipe.

- Install left coolant pipe. Refer to => [ Left Coolant Pipe, ] Left Coolant Pipe.

- Install right coolant pipe. Refer to => [ Right Coolant Pipe ] Right Coolant Pipe.

Tightening specifications. Refer to => [ Timing Chain Covers Assembly Overview ] Timing Chain Covers Assembly Overview