Disassembly and Assembly

CYLINDER HEAD


Disassembly and Assembly












CAUTION:
- When installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting surfaces with new engine oil.
- Apply new engine oil to threads and seat surfaces when installing the cylinder head, camshaft sprocket, crankshaft pulley and camshaft bracket.
- Attach tags to valve lifters so all parts are assembled in their original position.

DISASSEMBLY
1. Remove the valve lifter.
- Confirm installation point.





2. Remove the valve collet, valve spring retainer and valve spring using Tool.






CAUTION:
Do not remove valve spring seat from valve spring.
3. Push valve stem to combustion chamber side, and remove valve.
- Inspect valve guide clearance before removal. Refer to Inspection After Disassembly.
- Confirm installation point.
4. Remove valve oil seal using Tool.

Tool number : KV10107902 (J-38959)






5. When valve seat must be replaced, refer to Inspection After Disassembly.
6. When valve guide must be replaced, refer to Inspection After Disassembly.
7. Remove spark plug using suitable tool.
8. Remove spark plug tubes, if necessary using suitable tool.

CAUTION:
- Be careful not to damage cylinder head.
- Do not remove spark plug tube if not necessary. Once removed, the spark plug tube cannot be reused because of deformation during removal.

ASSEMBLY
1. Install valve guide. Refer to Inspection After Disassembly.
2. Install valve seat. Refer to Inspection After Disassembly.





3. Install new valve oil seal using Tool as shown.






4. Install valve.
- Install larger diameter to intake side.
5. Install valve spring.
- Install valve spring so that the identification color faces upwards.
- Confirm the identification color of the valve spring.
- Intake: pink
- Exhaust: green
6. Install valve spring retainer.
7. Install valve collet using Tool.
- Compress valve spring with valve spring compressor. Install valve collet with magnet hand.
- Tap stem edge lightly with plastic hammer after installation to check its installed condition.






8. Install valve lifter.





9. Install spark plug tube.
a. Remove old liquid gasket from cylinder head side mounting hole.
b. Apply liquid gasket all around on spark plug tube with a 12 mm
(0.47 in) width from edge of spark plug tube on the press fit side.
- Use Three Bond or equivalent. Refer to Fluid Type Specifications.
c. Press fit spark plug tube so that height is to (H) as shown.

Press fit height (H) standard value : 41.7 mm (1.642 in)


CAUTION:
- When press fitting be careful not to deform spark plug tube.
- After press fitting, wipe off any protruding liquid gasket on top surface of cylinder head.
10. Install spark plug using suitable tool.