Cylinder Head Assembly: Locations

Cylinder head, assembly overview

Note:
^ Replace cylinder head bolts.
^ Always replace self-locking nuts, bolts which have been tightened to tightening torque as well as gaskets and O-rings.
^ When installing a replacement cylinder head with camshafts installed, contact surfaces between roller rocker lever and cam running surfaces must be oiled.
^ The plastic protectors installed to protect the open valves must only be removed immediately before installing the cylinder head.
^ When replacing the cylinder head or cylinder head gasket, coolant must be completely replaced.





1 - Bolt
^ Tightening order

2 - Cylinder head cover

3 - Gasket
^ Replace if damaged or leaking

4 - Valve housing

5 - Oil filler cap

6 - Gasket
^ Replace if damaged or leaking

7 - 4 Nm

8 - Cylinder head cover gasket
^ Replace if damaged or leaking

9 - Vacuum pump

10 - 4 Nm

11 - Camshaft Adjustment Valve 1 N205

12 - Seal
^ Replace

13 - 10 Nm

14 - Cable bracket

15 - Seal
^ Replace if damaged or leaking

16 - 10 Nm

17 - Housing

18 - Gasket
^ Replace

19 - Transport strap

20 - 25 Nm

21 - 10 Nm
^ Stud bolt for intake manifold

22 - Partition plate

23 - Cylinder head gasket
^ Replace
^ Note installation position: Part number facing cylinder head

24 - 10 Nm

25 - Camshaft Position (CMP) sensor G40

26 - Seal

27 - 10 Nm
^ Stud bolt for tensioning roller

28 - 20 Nm
^ Stud bolt for exhaust manifold

29 - Cylinder head bolt
^ Replace
^ Observe sequence for loosening
^ Observe sequence for tightening
^ Torque specification: 40 Nm plus an additional 1/2 turn (180 °)





Cylinder head cover tightening sequence
- Tighten bolts to 10 Nm in sequence given





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

^ Max. permissible distortion: 0.05 mm





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

^ Minimum dimension: a = 139.20 mm