Camshaft Timing Chains

Camshaft Timing Chains

Special tools, testers and auxiliary items required

• Locking Pin (T40071)

Removing

• Transmission removed.

• Engine oil drained.

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

- Remove the cylinder head covers. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.

- Remove the affected camshaft timing chain from 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 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 the direction of the - arrow - and secure the chain tensioner using a (T40071).






- Remove the drive chain sprocket bolt - 1 -.

- Remove the drive chain sprocket and remove the 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, note installation position: Hole in housing floor faces toward chain tensioner, piston faces toward tensioning rail.

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


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 camshaft timing chain upward toward the cylinder head while noting the markings made during removal.






- Install the drive chain sprocket. Refer to => [ Installation Location of the Mounting
Pins for the Right Camshaft Timing Chain Drive Sprocket ] Timing Mechanism Drive Chain Overview.

- Tighten the mounting pin bolts - 1 -.

- Remove the (T40071).

• Ignore - arrow -.

- 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 performed in reverse order of removal, noting the following:

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

- Install the cylinder head covers. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.

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

- Fill engine oil and check oil level.