Camshaft Timing Chains

Camshaft Timing Chains

Removing

• The transmission is removed.

- Remove timing chain lower cover. Refer to => [ Lower Timing Chain Cover ] Lower Timing Chain Cover.

- Remove the camshaft timing chains from the camshafts. Refer to => [ Camshaft Timing Chains, Removing from Camshafts ] Camshaft Timing Chains, Removing from Camshafts.

If the running direction is reversed on a used camshaft timing chain, it could be destroyed.

• Paint arrows to mark the timing chain running direction so it can be installed again.

- Remove bolts - 1 - and - 2 - and remove the left chain tension and left camshaft timing chain.






- Remove bolts - 1 - and - 2 - and remove the right chain tension and right camshaft timing chain.






Installing

• Tightening specifications, refer to => [ Camshaft Timing Chains Overview ] Camshaft Timing Chains Overview.

• If the tensioning element was removed from the chain tensioner, then the installation position must be noted: Hole in housing floor faces toward chain tensioner, piston faces toward tensioning rail.

• Replace bolts which have been tightened to an additional torque.

• Replace the seals

Risk of damaging valves and piston crowns.

• If camshafts are rotated, crankshaft may not rest with any piston at "TDC".

- Press the guide rails for the left or right camshaft timing chain tensioner in - arrow - as far as the stop and secure the chain tensioner with a (T40071).






- Clean the oil strainer - 2 - in both chain tensioners if necessary.






- Position a new seal - 3 - on the rear of the chain tensioner - 1 -.

- Insert the chain tensioner on the left cylinder head and position the camshaft timing chain according to the markings made during removal, as shown in the illustration.






- Fasten bolts - 1 - and - 2 -.

- Insert the chain tensioner on the right cylinder head and position the camshaft timing chain according to the markings made during removal, as shown in the illustration.






- Fasten bolts - 1 - and - 2 -.

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

- Position the camshaft timing chain on the camshafts => [ Installing ] Camshaft Timing Chains, Removing from Camshafts.

- Install timing chain lower cover. Refer to => [ Lower Timing Chain Cover ] Lower Timing Chain Cover.