Cylinder Head Overview

Cylinder Head Overview

• Replace the cylinder head bolts.

• Always replace self-locking nuts, bolts which have been tightened to a torque angle as well as gaskets and O-rings.

• 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, the coolant must be completely replaced.






1 Cylinder Head Gasket

• Always replace.

• Note the installed position: Parts number to the cylinder head.

2 Bolt

• 25 Nm

3 Transport Strap

4 Bolt

5 Cylinder Head

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

6 Bolt

• Always replace.

• Follow the sequence when loosening, refer to => [ Loosening the Cylinder Head Bolts ].

• Observe the sequence for tightening, refer to => [ Cylinder Head Bolt Tightening Sequence ].

7 O-ring

• Always replace.

• Lubricate with engine oil.

8 Ball Stud

• 5 Nm

• With ball head for the engine cover.

9 Cap

• With a seal.

10 O-ring

• Always replace.

• Lubricate with engine oil.

11 Sealing Plug

12 Bracket

13 Bolt

• 9 Nm

14 Heat Shield

15 Bolt

• 20 Nm

16 Bolt

• 20 Nm

17 to the Intake Hose/Turbocharger

18 Ventilation Pipe

19 O-ring

• No replacement part.

20 Seal

• No replacement part.

21 Engine Cover

22 Bolt

23 Crankcase Ventilation

• Observe the sequence for tightening, refer to => [ Crankcase Ventilation Bolt Tightening Sequence ].

24 to the Intake Manifold

25 Gasket

• No replacement part.

26 Gasket

• Replace if damaged.

27 Vacuum Pump

• Removing and installing, refer to => [ Vacuum Pump ] Service and Repair.

28 Bolt

• 9 Nm

29 Bolt

• 9 Nm

• For engine code CBFA only.

30 Secondary Air Injection Solenoid Valve (N112)

• For engine code CBFA only.

31 Gasket

• Always replace.

• For engine code CBFA only.

32 Mounting Plate

33 Bolt

• 9 Nm

34 Connection

35 O-ring

• Always replace.

• Coat with coolant.

36 Bolt

• 25 Nm

37 Transport Strap

38 Bolt

• 9 Nm

39 Camshaft Position Sensor (G40)

40 Partition Plate

Crankcase Ventilation Bolt Tightening Sequence





- Tighten the crankcase ventilation bolts in sequence - 1 through 10 - to 11 Nm.

Loosening the Cylinder Head Bolts





- Remove the bolts - arrows -.

- Loosen the cylinder head bolts in sequence - 1 through 5 -.

Cylinder Head Bolt Tightening Sequence





- Tighten the cylinder head bolts in sequence - 1 through 5 -.

- Tighten the bolts to 40 Nm.

- Tighten the bolts an additional 90° (1/4) turn.

- Tighten the bolts an additional 90° (1/4) turn.

- Tighten the bolts - arrows - to 8 Nm.

- Tighten the bolts - arrows - an additional 90° (1/4) turn.

Checking the Cylinder head for Distortion





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

• Maximum permissible distortion: 0.05 mm