Overview - Cylinder Head
NOTE:
The cylinder head for cylinder bank 2 (left) is shown in the illustration.
- Cylinder Head Gasket
- Replacing, refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Installed position: The part number faces toward the cylinder head
- Change the coolant and engine oil after replacing
- Cylinder Head
- Removing and installing, refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Check for distortion, refer to Fig 5
- Reworking dimension, refer to Fig 6
- Change the coolant and engine oil after replacing
- O-Ring
- Replacing
- Camshaft Position Sensor
- Cylinder bank 1 (right) Camshaft Position Sensor -G40-
- Cylinder bank 2 (left) Camshaft Position Sensor 2 -G163-
- Removing and installing, refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
- Bolt
- Tightening specification -item 1- OVERVIEW - IGNITION SYSTEM => List Item:Bolt .
- Bolt
- Replacing
- Follow the sequence when loosening, refer to Loosen the cylinder head bolts in the sequence -1 to 8-.
- Tightening specification and sequence, refer to Fig 4.
- Ignition Coil
- Removing and installing, refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .
- Cylinder Head Cover
- Removing and installing, refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING for left side, refer to RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING for right side.
- Seal
- Replace if damaged or leaking
- Cap
- Hose
- For the crankcase ventilation
- Removing and installing, refer to CRANKCASE VENTILATION HOSES, REMOVING AND INSTALLING
.CAUTION:
Risk of violating emissions legislation on USA vehicles.
- Do not open the hose connection.
- O-Ring
- Replacing
- Bolt
- Bolt
- Tightening specification -item 8- OVERVIEW - IGNITION SYSTEM => List Item:Bolt .
- Connector Strip
- For the ignition coils
- Seal
- For the cylinder head cover
- Replace if damaged or leaking
- Camshaft Adjustment Solenoid Valve
- Cylinder bank 1 (right) Camshaft Adjustment Valve 1 -N205-
- Cylinder bank 2 (left) Camshaft Adjustment Valve 2 -N208-
- Bolt
- 5 Nm
- O-Ring
- Replacing
-- Tighten the bolts to 9 Nm in the following sequence: -1 to 12-.
-- Tighten the bolts to 9 Nm in the following sequence: -1 to 12-.
NOTE:
Replace any bolts that were tightened with an additional turn.
-- Tighten the bolts in four steps in the sequence shown.
| Step | Bolts | Tightening specification/additional turn |
|---|---|---|
| 1. | -1 to 8- | Install all the way in by hand. |
| 2. | -1 to 8- | 40 Nm |
| 3. | -1 to 8- | Tighten an additional 90° |
| 4. | -1 to 8- | Tighten an additional 90° |
-- Check the cylinder head at several locations for distortion using a Straight Edge - 500mmVAS6075 and a feeler gauge.
- Maximum warp: 0.05 mm
Resurfacing cylinder head (face grinding) is only permissible to minimum dimension -a-.
- Minimum dimension -a- = 139.20 mm.
-- Tighten the bolt -arrow- to 9 Nm.