Cylinder Head Assembly Overview

Cylinder Head Assembly Overview

• Cylinder head for cylinder bank 2 (left) is shown in illustration.





1 Cylinder head gasket

• Replacing, refer to => [ Cylinder Head ] Cylinder Head.

• Installation position: the part number faces the cylinder head

• After replacing, change coolant and engine oil

2 Cylinder Head

• Removing and installing, refer to => [ Cylinder Head ] Cylinder Head

• Check for distortion, refer to => [ Checking Cylinder Head for Distortion ]

• Reworking dimension, refer to => [ Reworking Dimension, Cylinder Head ]

• After replacing, change coolant and engine oil

3 Cylinder head cover gasket

• Replace if damaged or leaking

4 Cylinder head cover

• Removing and installing, refer to: Left => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, right => [ Right Cylinder Head Cover ] Right Cylinder Head Cover

5 Gasket

• For cap

• Replace if damaged or leaking

6 Cap

7 Ignition coil

• Remove with Puller (T40039)

8 Special bolt - 9 Nm

• Replace if seal is damaged

• Note tightening sequence => [ Tighten cylinder head cover in sequence. ] Left Cylinder Head Cover

9 Valve for camshaft adjustment

• Cylinder bank 1 (right) Camshaft Adjustment Valve 1 (N205)

• Cylinder bank (left) Camshaft Adjustment Valve 2 ( N208)

10 2.4 Nm

11 O-ring

• Replace

12 Seal

• Replace

13 Locking bolt - 35 Nm

14 2.4 Nm

15 Camshaft adjustment valve in the exhaust

• Cylinder bank 1 (right) Exhaust camshaft control valve 1 (N318)

• Cylinder bank (left) Camshaft Adjustment Valve 2 (exhaust) (N319)

16 O-ring

• Replace

17 Cylinder head bolt

• Replace

• Observe sequence for loosening => [ Loosen cylinder head bolts in the sequence. ] Cylinder Head

• Note tightening sequence => [ Tighten the bolts in 6 steps according to
the tightening sequence: ] Cylinder Head

Checking Cylinder Head for Distortion





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

• Max. 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.