Cylinder Head and Cover Overview

Cylinder Head and Cover Overview

• When installing a replacement cylinder head, all of the contact surfaces between the hydraulic lash adjusters, roller rocker arms and cam running surfaces on the camshaft must be lubricated before installing the cylinder head cover.

• Only remove the plastic protectors installed to protect the open valves immediately before installing the cylinder head.

• Replace the cylinder head bolts.

• If the cylinder head is going to be replaced, then it is also necessary to replace all the coolant.






1 Bolt

• 10 Nm

• Tightening sequence, refer to => [ Cylinder Head Cover ] Cylinder Head Cover.

2 Cylinder Head Cover

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

3 Gasket

• Replace if damaged or leaking.

4 Crankcase Ventilation Valve

5 Cap

6 Gasket

• Replace if damaged or leaking.

7 Bolt

• 4 Nm

8 Cylinder Head Cover Gasket

• Replace if damaged or leaking.

9 Vacuum Pump

10 Bolt

• 4 Nm

11 Camshaft Adjustment Valve 1 (N205)

• Removing and installing, refer to => [ Camshaft Adjustment Valve 1 (N205) ] Camshaft Adjustment Valve 1 (N205).

12 Seal

• Always replace.

13 Bolt

• 10 Nm

14 Wire Bracket

15 Seal

• Replace if damaged or leaking.

16 Bolt

• 10 Nm

17 Housing

18 Gasket

• Always replace.

19 Transport Strap

20 Bolt

• 25 Nm

21 Stud Bolt

• 10 Nm

• For the intake manifold.

22 Partition

23 Cylinder Head Gasket

• Always replace.

• Note the installed position: The part number faces the cylinder head.

24 Bolt

• 10 Nm

25 Camshaft Position Sensor (G40)

26 Seal

27 Stud Bolt

• 10 Nm

• For the toothed belt tensioner.

28 Stud Bolt

• 20 Nm

• For the exhaust manifold.

29 Cylinder Head

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

30 Bolt

• 40 Nm + an additional 180° (1/2) turn.

• Always replace.

• Follow the loosening and tightening sequence. Refer to => [ Cylinder Head ] Cylinder Head.

Checking the Cylinder Head for Distortion





- Check the cylinder head for distortion at several locations using the straight edge 500 mm (VAS 6075) and a feeler gauge.

• Maximum permissible distortion: 0.05 mm

- Replace the cylinder head if the maximum distortion is exceeded.