Camshaft Timing Chains

Camshaft Timing Chains

Removing

• The transmission is removed.

• Engine oil drained.

- Remove the upper section of the intake manifold.

- 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.

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

• Paint arrows to mark the left and right camshaft timing chain running direction so they can be installed again. Do not mark camshaft timing chain with punch, notch or something similar.

- Remove the (T40071) and the left camshaft timing chain.





- Remove the bolts - 1 - and - 2 - and the right chain tensioner.





- Press the timing mechanism chain tensioner guide rail in direction of - arrow - and secure the chain tensioner using a (T40071).





- Loosen the drive chain sprocket bolt - 1 - 1 turn.

- Tilt the drive chain sprocket with the mounting pins to the side slightly and remove the right camshaft timing chain upward.

Installing

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

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

• Replace bolts which have been tightened to torque.

CAUTION!
Risk of damaging valves and piston crowns.

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

- Position the left camshaft timing chain according to the markings made during removal as shown in the illustration.

- Press the guide rail for the left camshaft timing chain tensioner down and secure the chain tensioner using a (T40071).





- Guide the right camshaft timing chain on the drive sprocket mounting pins while noting the markings made during removal.





- Tighten the mounting pin bolts - 1 -.

- Remove the (T40071).

- Insert the chain tensioner at the right cylinder head and position the camshaft timing chain.

- Fasten bolts - 1 - and - 2 -.





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

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

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

- Install the upper section of the intake manifold.