Cylinder Head Assembly: Specifications

Cylinder Head Bolts





Replace bolts
First pass: Insert bolts by hand as far as stop
Second pass 30 Nm
Third pass 60 Nm
Fourth pass Tighten 90° (1/4) additional turn
Fifth pass Tighten 90° (1/4) additional turn
Sixth pass: Insert bolts - arrows - with locking compound and tighten 8 Nm
Final pass: Tighten bolts - marrows - an additional 90° (1/4 turn)

Checking Cylinder Head for Distortion





Check cylinder head at multiple points for distortion, using straight edge and feeler gauges.

Maximum permissible distortion 0.1 mm

Reworking Dimension, Cylinder Head





Resurfacing cylinder head (face grinding) is only permissible to minimum dimension - a -.

Minimum dimension: - a - 139.5 mm

Guide Frame Tightening Sequence





First pass: Install bolts by hand as far as stop
Final pass 8 Nm

• After installing the camshafts, the engine may not be started for approximately 30 minutes. The hydraulic adjusting elements must seat themselves (otherwise the valves will seat themselves on the pistons).

• After working on the valvetrain and lifters, carefully rotate the crankshaft by hand at least 2 full revolutions before starting to be sure that valves do not strike the pistons.

Magnesium Intake Manifold





First pass 8 Nm
Second pass 9 Nm
Final pass Tighten 90°

Plastic Intake Manifold

Upper Manifold





First pass 8 Nm
Final pass 11 Nm

Lower Manifold 10 Nm diagonally and in steps





Exhaust Manifold Nuts









Replace nuts
First pass Hand tight
Second pass 20 Nm
Final pass 30 Nm