Cylinder Head Assembly Overview

Cylinder Head Assembly Overview





1 Bolt, 10 Nm

2 Cylinder Head Cover

• With pressure regulator valve for the crankshaft housing ventilation.

• Bleeder hose to intake manifold, see - item 1 - in => [ Hose for Crankcase Ventilation ] Intake Manifold and Attachments Assembly Overview.

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

• Removal and installation, refer to => [ Cylinder Head Cover ] Service and Repair.

3 Cylinder Head Cover Gasket

• Replace if damaged or leaking.

4 Bolt, 10 Nm

5 Oil Filler Cap

6 Gasket

• Replace if damaged or leaking.

7 Bolt, 10 Nm

8 Bleeder Hose for Crankcase Ventilation

• Ensure the hose is securely seated.

• To disengage, squeeze together the securing ring.

9 to Intake Hose/Intake Manifold

10 Wire Bracket

11 Seal

• Replacing, refer to => [ Chain Compartment Cover Seal ] Service and Repair.

12 Wire Bracket

13 Chain Compartment Cover

• Removal and installation, refer to => [ Chain Compartment Cover ] Service and Repair.

14 Bolt, 2 Nm

15 Camshaft Adjustment Valve 1 (N205)

• Checking, refer to vehicle diagnostic tester VAS 5051B "Guided Fault Finding".

16 O-ring

• Replace if damaged.

17 Bolt 10 Nm

18 Camshaft Position (CMP) Sensor (G40)

19 Transport Strap

20 Bolt, 25 Nm

21 Cylinder Head Gasket

• Replace

• After replacing, replace the entire amount of coolant.

22 Cylinder Head

• Removal and installation, refer to => [ Cylinder Head ] Cylinder Head.

• Checking cylinder head for warpage, refer to => [ Cylinder Head, Checking for Distortion ].

• It is not permitted to rework the sealing surface

• With the coolant pipe connection pressed in.

- If necessary, remove coolant deposits using a copper wire brush or fine sandpaper (minimum 100 grit).

- If the pipe connection is worn, replace it using locking fluid (D 000600 A2).

23 Bolt, 40 Nm + 180° (1/2) additional turn

• Replace

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

24 Wire Bracket

• For the Heated Oxygen Sensor (HO2) (G39).

Cylinder Head Cover Tightening Sequence





Cylinder Head, Checking for Distortion





- Check the cylinder head at multiple points for distortion with a straight edge 500 mm (VAS 6075) and feeler gauges.

• Max. permissible distortion: 0.05 millimeters (mm)

If this value is exceeded, the cylinder head must be replaced. It is not permissible to rework the sealing surface.