Cylinder Head Overview
Cylinder Head Overview
• Replace the cylinder head bolts.
• Always replace self-locking nuts, bolts which have been tightened to tightening specifications as well as gaskets and O-rings.
• When installing a replacement cylinder head with camshafts installed, contact surfaces between roller rocker lever and cam running surfaces must be oiled.
• 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, coolant must be completely replaced.
1 Bolt
2 Cylinder Head Cover
3 Gasket
• Replace if damaged or leaking
4 Valve Housing
5 Oil Filler Cap
6 Gasket
• Replace if damaged or leaking
7 Bolt
• 4 Nm
8 Cylinder Head Cover Gasket
• Replace if damaged or leaking
9 Vacuum Pump
10 Bolt
• 4 Nm
11 Camshaft Adjustment Valve 1 (N205)
• Removing, refer to => [ Camshaft Adjustment Valve 1 ] Camshaft Adjustment Valve 1
12 Seal
• Replace
13 Bolt
• 10 Nm
14 Cable Bracket
15 Seal
• Replace if damaged or leaking
16 Bolt
• 10 Nm
17 Housing
18 Gasket
• Replace
19 Transport Strap
20 Bolt
• 25 Nm
21 Intake Manifold Stud Bolt
• 10 Nm
22 Partition Plate
23 Cylinder Head Gasket
• Replace
• Note installation position: The part number faces the cylinder head
24 Bolt
• 10 Nm
25 Camshaft Position Sensor (G40)
26 Seal
27 Tensioning Roller Stud Bolt
• 10 Nm
28 Exhaust Manifold Stud Bolt
• 20 Nm
29 Cylinder Head
• Check for distortion
30 Cylinder Head Bolt
• Replace
• Tightening specification: 40 Nm plus an additional 180° turn
Cylinder Head Cover Tightening Sequence
- Install bolts - 1 through 14 - and tighten by hand.
- Tighten the bolts - 1 through 14 - diagonally to 10 Nm.
Loosening the Cylinder Head
- Loosen cylinder head bolts in sequence shown and remove.
Cylinder Head Tightening Sequence
- Tighten cylinder head bolts in - 1 through 10 - sequence as follows
- 1. Tighten to 40 Nm using a torque wrench.
- 2. Tighten further 90° using a rigid wrench.
- 3. Tighten further 90° using a rigid wrench.
Checking Cylinder Head for Distortion
- Check cylinder head at multiple points for distortion, using straight edge and feeler gauges.
• Maximum permissible distortion: 0.05 mm.