Part I
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Part II. Refer to OVERVIEW - VALVETRAIN .
- Exhaust Valve
- Do not rework, only lapping is permitted
- Valve Dimensions. Refer to VALVE DIMENSIONS .
- Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
- Cylinder Head
- Only replace together with the cylinder head cover
- Valve Stem Seal
- Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
- Valve Spring
- Valve Spring Retainer
- Valve Keepers
- Hydraulic Lifter
- Do not interchange
- Lubricate the contact surface
- Clip
- For hydraulic lifter
- Roller Rocker Lever
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Mark the installed position for reinstallation.
- Check the roller bearing for ease of movement
- Lubricate the running surfaces before installing
- Exhaust Camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigauge® (roller rocker lever removed)
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
- Spring
- Ball
- For sliding bar
- Installing. Refer to SLIDING BAR BALL, INSTALLING .
- Cylinder Head Cover
- With integrated camshaft bearings
- Clean the sealing surface, reworking is not permitted.
- Remove old sealant residue.
- Removing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Only replace together with the cylinder head
- Bolt
- Tightening sequence. Refer to appropriate service information. .
- Always replace after removing.
- Loosening. Refer to appropriate service information. .
- Intake Camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigauge® (roller rocker lever removed)
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
- Alignment Pins
- Alignment Pins
- Intake Valve
- Do not rework, only lapping is permitted
- Valve Dimensions. Refer to VALVE DIMENSIONS .
- Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
-- Loosen the cylinder head cover in the order -1 through 6-.
- Replace the bolts that were tightened with an additional turn after removing them.
- Pay attention that the cylinder head cover is not tilted.
-- Tighten the bolts in the steps shown in the sequence:
| Step | Bolts | Tightening Specification/Additional Turn |
|---|---|---|
| 1. | -1 to 6- | Install by hand all the way |
| 2. | -1 to 6- | 8 Nm |
| 3. | -1 to 6- | 90° additional turn |