Cylinder Head, Valvetrain - Fastener Tightening Specifications

Fastener Tightening Specifications






Timing Chain Upper Cover - Tightening Sequence

- Tighten the bolts - 1 through 5 - in the sequence shown:

- Tighten the bolts to 9 Nm.






Timing Chain Lower Cover Tightening Sequence

- Tighten the bolts - 1 through 15 - in 2 stages in the sequence shown:






- 1. Tighten the bolts to 8 Nm.

- 2. Tighten the bolts an additional 45°.

Intermediate Shaft Sprocket Tightening Sequence


Always replace the intermediate shaft sprocket. Otherwise the backlash will not adjust itself and it could result in engine damage.

The new intermediate shaft sprocket has an anti-friction coating that wears off after a short period of use, which automatically adjusts the backlash.

- Tighten with a new bolt as follows:






- 1. Tighten to 10 Nm using a torque wrench.

- 2. Rotate the intermediate shaft sprocket.

The intermediate shaft sprocket must not have any play. Loosen and tighten it again if necessary.

- 3. Tighten to 25 Nm using a torque wrench.

- 4. Tighten further 90° using a rigid wrench.

Crankcase Ventilation, Tightening Sequence






• The bolts are self-tapping. Only use original bolts when replacing the cylinder head, since the cylinder head is delivered without a thread for the installing the crankcase ventilation.

• It is not permitted to cut the thread with a thread cutter.

- Tighten the crankcase ventilation bolts to 11 Nm in - 1 to 10 - sequence.

Cylinder Head Cover Tightening Sequence






- Replace bolts.

- 1. Hand-tighten bolts in several stages in - 1 to 6 - sequence.

- 2. Tighten the bolts in a - 1 to 6 - sequence to 8 Nm using a torque wrench.

- 3. Tighten the bolts an additional 90° using a rigid wrench in the sequence - 1 to 6 -.