Cylinder Head Overview
Cylinder Head Overview
• Replace the cylinder head bolts.
• Always replace self-locking nuts, bolts which have been tightened to specifications 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
• Installed position: the part number faces the cylinder head.
2 Bolt
• 25 Nm
3 Transport Strap
4 Bolt
• Tightening sequence, refer to => [ Cylinder Head Bolt Tightening Sequence
and Specification ].
5 Cylinder Head
• Removing and installing, refer to => [ Cylinder Head ] Cylinder Head.
• Checking for distortion, refer to => [ Checking Cylinder Head for Distortion ].
6 Bolt
• Always replace
• Observe the sequence for loosening, refer to => [ Loosening the Cylinder Head Bolts ].
• Observe the sequence for tightening, refer to => [ Cylinder Head Bolt Tightening Sequence
and Specification ].
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 Plugs
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 and Specification ].
23 Crankcase Ventilation
• Observe the sequence for tightening, refer to => [ Crankcase Ventilation Bolt Tightening
Sequence and Specification ].
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 (AIR) 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 (CMP) Sensor (G40)
40 Partition Plate
Crankcase Ventilation Bolt Tightening Sequence and Specification
- Tighten the crankcase ventilation bolts to 11 Nm in sequence - 1 through 10 -.
Loosening the Cylinder Head Bolts
- Remove the bolts - arrows -.
- Loosen the cylinder head bolts in sequence - 1 through 5 -.
Cylinder Head Bolt Tightening Sequence and Specification
- Tighten the cylinder head bolts in sequence - 1 through 5 -.
- Tighten the bolts to 40 Nm.
- Tighten the bolts an additional 90 degrees (1/4) turn using a ratchet.
- Tighten the bolts an additional 90 degrees (1/4) turn using a ratchet.
- Tighten the bolts - arrows - to 8 Nm.
- Tighten the bolts - arrows - an additional 90 degrees (1/4) using a ratchet.
Checking 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.
• Maximum permissible distortion: 0.05 mm