Cylinder Head Assembly Overview
Cylinder Head Assembly Overview
• The illustration shows the cylinder bank 2 cylinder head (left).
1 Cylinder head gasket
• Replacing, refer to => [ Cylinder Heads ] Cylinder Heads.
• Installation position: Part number facing cylinder head
• After replacing, change coolant and engine oil
2 Cylinder Head
• Removing, refer to => [ Cylinder Heads ] Cylinder Heads
• Refer to => [ Checking cylinder head for distortion ]
• Refer to => [ Reworking dimension, cylinder head ]
• Installing => [ Installing ] Cylinder Heads
• After replacing, change coolant and engine oil
3 Bolt
4 Vacuum pump
5 O-ring
• Replace
6 Bolt
• 20 Nm
7 Engine lifting eye
8 Camshaft position sensor, intake camshaft
• Cylinder bank 1 (right) Camshaft Position (CMP) Sensor (G40)
• Cylinder bank 2 (left) Camshaft Position (CMP) Sensor 2 (G163)
9 Bolt
• 9 Nm
10 Bolt
• Loosening procedure => [ The cams on the intake camshaft partially
restrict access to the cylinder head bolts, such as bolts and shown in this example. ] Cylinder Heads
• Replace
• Loosening procedure => [ Position the cylinder head. ] Cylinder Heads
• Tighten in 3 stages:
- Tighten to 40 Nm.
- Tighten an additional 90°.
- Tighten an additional 90°.
11 Ignition coil
• Use Puller for Ignition Coil (T40039) for removal
12 Cylinder head cover
• Removing and installing, refer to: Left => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, right => [ Right Cylinder Head Cover ] Right Cylinder Head Cover
13 Gasket
• Replace if damaged or leaking
14 Cap
15 Bolt
• Replace if seal is damaged
• Tightening specifications, refer to => [ Left Cylinder Head Cover, Tightening Specifications
and Sequence ] and => [ Right Cylinder Head Cover, Tightening Specifications
and Sequence ].
16 Bolt
17 Connector strip
• For ignition coils
18 Cylinder head cover gasket
• Replace if damaged or leaking
19 Bolt
• 2.5 Nm
20 Solenoid valve for camshaft adjustment - exhaust side
• Cylinder bank 1 (right) Exhaust camshaft control valve 1 (N318)
• Cylinder bank 2 (left) Camshaft Adjustment Valve 2 (exhaust) (N319)
21 Solenoid valve for camshaft adjustment - intake side
• Cylinder bank 1 (right) Camshaft Adjustment Valve 1 (N205)
• Cylinder bank 2 (left) Camshaft Adjustment Valve 2 (N208)
22 O-rings
• Replace
23 O-ring
• Replace
24 Bolt
• 9 Nm
25 Camshaft position sensor, exhaust camshaft
• Cylinder bank 1 (right) Camshaft Position (CMP) Sensor 3 (G300)
• Cylinder bank 2 (left) Camshaft Position (CMP) Sensor 4 (G301)
Left Cylinder Head Cover, Tightening Specifications and Sequence
- Tighten bolts to 9 Nm in the sequence - 1 to 12 -.
Right Cylinder Head Cover, Tightening Specifications and Sequence
- Tighten bolts to 9 Nm in the sequence - 1 to 12 -.
Checking cylinder head for distortion
- Check the cylinder head for distortion with the straight edge and feeler gauge in several places.
• Maximum warpage: 0.05 mm.
Reworking dimension, cylinder head
Resurfacing cylinder head (face grinding) is only permissible to minimum dimension - a -.
• Minimum dimension - a - = 139.20 mm.
Oil dipstick guide tube - tightening specifications
- Tighten bolt - arrow - to 9 Nm.