Cylinder Head, Component Overview

Cylinder head, component overview

Note:
^ Cylinder head for cylinder bank 2 (left) is shown in illustration.





1 - Cylinder head gasket

^ Installed location: Part Number, points to cylinder head
^ After replacing, change coolant and engine oil

2 - Cylinder head

^ Check for distortion
^ Reworking dimension
^ After replacing, change coolant and engine oil

3 - Cylinder head cover gasket

^ Replace if damaged or leaking

4 - 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

9 - 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 2 (exhaust) N319

16 - O-ring

^ Replace

17 - Cylinder head bolt

^ Replace
^ Observe sequence for loosening
^ Note tightening sequence





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.