Cylinder Head, Assembly Overview
Cylinder Head, Assembly Overview
• Replace cylinder head bolts.
• Always replace self-locking nuts, bolts which have been tightened to tightening specifications as well as gaskets and O-rings.
• The plastic protectors installed to protect the open valves must only be removed immediately before fitting the cylinder head.
• When replacing the cylinder head or cylinder head gasket, coolant must be completely replaced.
1 Cylinder head gasket
• Replace
• Note installation position: Part number facing cylinder head
2 Bolt
• 25 Nm
3 Transport strap
4 Bolt
• Tightening order => [ Cylinder head tightening sequence ]
5 Cylinder Head
• Removing and installing => [ Cylinder Head, Removing and Installing ] Cylinder Head, Removing and Installing
• Check for distortion => [ Checking cylinder head for distortion ]
6 Cylinder head bolt
• Replace
• Observe sequence for loosening => [ Loosen the cylinder head ]
• Observe sequence for tightening => [ Cylinder head tightening sequence ]
7 O-ring
• Replace
• Lubricate with engine oil
8 Sealing plugs
• 5 Nm
• with ball head for the engine cover
9 Oil filler cap
• with gasket
10 O-ring
• 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 manifold/turbocharger
18 Ventilation pipe
19 O-ring
• no replacement part
20 Gasket
• no replacement part
21 Engine cover
22 Bolt
• Tightening order => [ Crankcase ventilation, tightening sequence ]
23 Crankcase ventilation
• Observe sequence for tightening => [ Crankcase ventilation, tightening sequence ]
24 to Intake manifold
25 Gasket
• no replacement part
26 Gasket
• replace if damaged
27 Vacuum pump
• Removing and installing
28 Bolt
• Tightening specifications
29 9 Nm
• engine code CBFA only
30 Secondary air injection (AIR) solenoid valve (N112)
• engine code CBFA only
31 Gasket
• engine code CBFA only
• Replace
32 Mounting plate
33 Bolt
• 9 Nm
34 Connecting piece
35 O-ring
• Replace
• coat with coolant
36 Bolt
• 25 Nm
37 Transport strap
38 Bolt
• 9 Nm
39 Camshaft Position (CMP) sensor (G40)
40 Partition plate
Crankcase ventilation, tightening sequence
- Tighten the crankcase ventilation bolts to 11 Nm in - 1 to 10 - sequence.
Loosen the cylinder head
- Remove the bolts - arrows -.
- Loosen the cylinder head bolts in - 1 to 5 - sequence
Cylinder head tightening sequence
- Tighten the cylinder head bolts in - 1 to 5 - sequence.
- Tighten 40 Nm using a torque wrench.
- Tighten further 90° using a rigid wrench.
- Tighten further 90° using a rigid wrench.
- Pre-tighten the bolts - arrows - to 8 Nm
- Tighten the bolts - arrows - 90° further using a rigid wrench.
Checking cylinder head for distortion
- Check the cylinder head on several locations for distortion using a 500 mm straight edge (VAS 6075) and a feeler gauge.
• Max. permissible distortion: 0.05 mm