Cylinder Head, Valvetrain - Fastener Tightening Specifications

Fastener Tightening Specifications






Upper Timing Chain Cover - Tightening Sequence






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

- Tighten the bolts to 9 Nm.

Lower Timing Chain Guard - Tightening Sequence for 15 Bolts






- 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°.

Lower Timing Chain Guard - Tightening Sequence for 8 Bolts






- Tighten the bolts - 1 through 8 - in 2 stages in the sequence shown:

- 1. Tighten the bolts to 4 Nm.

- 2. Tighten the bolts an additional 45°.

Intermediate Sprocket Tightening Sequence






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

The new intermediate 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. Turn the intermediate sprocket.

The intermediate 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 Tightening Sequence






- Tighten the cylinder head bolts in - 1 to 10 - sequence.

- 1. Tighten to 40 Nm using a torque wrench.

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

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

- 4. Tighten the bolts - arrows - to 8 Nm.

- 5. Tighten the bolts - arrows - 90° further using a rigid wrench.

Cylinder Head Cover Tightening Sequence






- Replace the bolts.

- 1. Hand-tighten bolts in several steps 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 -.

• Make sure the cylinder head cover is not tilted.