Cylinder Head and Cover Assembly Overview

Cylinder Head and Cover Assembly Overview





1 Bolt, 10 Nm

2 Cylinder head cover

• With the pressure regulator valve for the crankshaft housing ventilation.

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

3 Cylinder head cover gasket

• Replace if damaged or leaking.

4 Bleeder hose for crankcase ventilation

• To the intake manifold.

5 Oil filler cap

6 Gasket

• Replace if damaged or leaking.

7 Bolt, 10 Nm

8 Wire bracket

9 Chain compartment cover seal

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

10 Wire bracket

11 Chain compartment cover

• Removing and installing, refer to --> [ Chain Compartment Cover ] Service and Repair.

12 Bolt, 2 Nm

13 Camshaft adjustment valve 1 (N205)

• Check using the.

14 O-ring

• Replace if damaged.

15 Bolt, 10 Nm

16 Camshaft Position (CMP) sensor (G40)

17 Transport strap

18 Bolt, 25 Nm

19 Cylinder head gasket

• Always replace.

• After replacing, replace the coolant.

20 Cylinder head

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

• Check cylinder head for distortion.

• It is not permitted to rework the sealing surface.

• With coolant pipe connection pressed in.

- If necessary, remove the 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).

21 Sealing cap

• On engines without Secondary Air Injection (AIR) system only.

• Secondary Air Injection (AIR) system assembly overview, refer to --> [ Secondary Air Injection System Assembly Overview ] Service and Repair.

22 Gasket

• Replace

23 Cylinder head bolt

• Always replace

• Follow the sequence for loosening and tightening, refer to --> [ Cylinder Head ] Cylinder Head.

• Tightening specification: 40 Nm + 180° (1/ 2 turn) additional turn.

24 Wire bracket

• For the Heated Oxygen Sensor (HO).

Tightening Sequence for the Cylinder Head Cover Bolts





Checking Cylinder Head for Distortion





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

• Max. permissible distortion: 0.05 mm

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