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: Part number faces the cylinder head.

2 Bolt

• 25 Nm

3 Transport Strap

4 Bolt

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

5 Cylinder Head

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

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

6 Bolt

• Always replace.

• Observe the sequence for loosening, refer to => [ Cylinder Head Bolt, Loosening ].

• 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 a 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 Gasket

• No replacement part.

21 Engine Cover

22 Bolt

• Tightening sequence, refer to => [ Crankcase Ventilation Bolt Tightening Sequence ].

23 Crankcase Ventilation

• Observe the tightening sequence, 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 ] Vacuum Pump.

28 Bolt

• 9 Nm

29 Bolt

• 9 Nm

• Engine code CBFA only.

30 Secondary Air Injection Solenoid Valve (N112)

• Engine code CBFA only.

31 Gasket

• Always replace.

• Engine code CBFA only.

32 Mounting Plate

33 Bolt

• 9 Nm

34 Connecting Piece

35 O-ring

• Always replace.

• Lubricate 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 - 1 to 10 - in sequence to 11 Nm.

Cylinder Head Bolt, Loosening





- Remove the bolts - arrows -.

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

Cylinder Head Bolt Tightening Sequence





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

- Tighten the bolts to 40 Nm using a torque wrench.

- Tighten the bolts an additional 90° (1/4) using a ratchet.

- Tighten the bolts an additional 90° (1/4) using a ratchet.

- Tighten the bolts - arrows - to 8 Nm.

- Tighten the bolts - arrows - an additional 90° (1/4) using a ratchet.

Checking the Cylinder Head for Distortion





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

• Max. permissible distortion: 0.05 mm