Disassembly and Assembly

CYLINDER HEAD


Disassembly and Assembly


COMPONENTS





- for symbols not described on the above.Abbreviations

DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove valve lifter.
- Identify installation positions, and store them without mixing them up.
3. Remove valve collet.





- Compress valve spring with valve spring compressor (SST), attachment (SST), and adapter (SST). Remove valve collet with magnetic hand.

CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer and valve spring (with valve spring seat).

CAUTION:
Never remove valve spring seat from valve spring.
5. Push valve stem to combustion chamber side, and remove valve.
- Identify installation positions, and store them without mixing them up.





6. Remove valve oil seal with valve oil seal puller (SST).
7. If valve seat must be replaced, refer to Inspection After Disassembly.
8. If valve guide must be replaced, refer to Inspection After Disassembly.
9. Remove spark plug tube if necessary.
- Using pair of pliers, pull spark plug tube out of cylinder head.

CAUTION:
- Take care not to damage cylinder head.
- Once removed, spark plug tube will be deformed and cannot be reused. Never remove it unless absolutely necessary.

ASSEMBLY
1. When valve guide is removed, install it. Refer to Inspection After Disassembly.
2. When valve seat is removed, install it. Refer to Inspection After Disassembly.
3. Install new valve oil seal as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.





b. Install with valve oil seal drift (SST) to match dimension in the figure.
4. Install valve.
- Install in the original position.

NOTE:
Larger diameter valves are for intake side.
5. Install valve spring (with valve spring seat).





- Install smaller pitch (valve spring seat side) to cylinder head side.
6. Install valve spring retainer.
7. Install valve collet.





- Compress valve spring with valve spring compressor (SST), attachment (SST) and adapter (SST). Install valve collet with magnetic hand.

CAUTION:
When working, take care not to damage valve lifter holes.
- Tap stem edge lightly with plastic hammer after installation to check its installed condition.
8. Install valve lifter.
- Install it in the original position.
9. Install spark plug tube.
- Press-fit spark plug tube as follows:
a. Remove old liquid gasket adhering to cylinder-head mounting hole.
b. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use genuine high strength thread locking sealant or equivalent. Refer to Recommended Chemical Products and Sealants.





c. Using drift, press-fit spark plug tube so that its height "H" is as specified in the figure.

Standard press-fit height "H" : 38.4 - 39.4 mm (1.512 - 1.551 in)


CAUTION:
- When press-fitting, take care not to deform spark plug tube.
- After press-fitting, wipe off liquid gasket protruding onto cylinder head upper face.
10. Install spark plug with spark plug wrench (commercial service tool).