Overhaul

Disassembly and Assembly

Exploded View EM-66:

DISASSEMBLY
1. Remove the spark plug.
2. Remove the valve lifter.
^ Identify the installation positions, and store them without mixing them up.





3. Remove the valve collet using Tool.
Tool number
: KV10116200 (J-26336-A)
: KV10115900 (J-26336-20)
: KV10109220 ( - )

CAUTION: When working, take care not to damage valve lifter holes.

4. Remove the valve spring retainer, valve spring and valve spring seat.
5. Inspect the valve guide clearance.
6. Push the valve stem to the combustion chamber side, and remove the valve.
^ Identify the installation positions, and store them without mixing them up.





7. Remove the valve oil seal using Tool.
Tool number: KV10107902 (J-38959)
8. Replace the valve seat if necessary.
9. Replace the valve guide if necessary.
10. Remove the spark plug tube, as necessary.
^ Remove the spark plug tube out of the cylinder head using suitable tool.

CAUTION:
^ Do not damage the cylinder head.
^ Do not remove the spark plug tube unless absolutely necessary. Once removed, the spark plug tube will be deformed and cannot be reused.

ASSEMBLY
1. Install the valve guide if necessary.
2. Install the valve seat if necessary.





3. Install the valve oil seal using Tool.
Tool number: KV10115600 (J-38958)
^ Apply new engine oil on the new valve oil seal joint and seal lip.
^ Install the valve oil seal to the specified height "H".
Height "H" (without valve spring installed)
Intake and exhaust: 14.3 - 14.9 mm (0.563 - 0.587 in)
4. Install the valves in their original position.
5. Install the valve spring seats.





6. Install the valve springs.
^ Install the narrow pitch end (paint mark side) to the cylinder head side.
7. Install the valve spring retainers.





8. Install the valve collet using Tool.
Tool number
: KV10116200 (J-26336-A)
: KV10115900 (J-26336-20)
: KV10109220 ( - )

CAUTION: When working, take care not to damage valve lifter holes.

9. Install the valve lifters.
^ Install the removed parts in their original locations.
^ If installing new lifters, select the correct size lifter for proper valve clearance.
10. Install the spark plug tube if necessary, following the procedure below.
a. Remove any old liquid gasket adhering to the cylinder-head spark plug tube hole.
b. Apply liquid gasket to area within approximately 12 mm (0.47 in) from the edge of the spark plug tube press-fit side.
Use Genuine RTV Silicone Sealant or equivalent.





c. Press-fit the spark plug tube to the specified height "H" using suitable tool.
Standard press-fit height "H": 38.4 - 39.4 mm (1.512 - 1.551 in)

CAUTION:
^ When press-fitting, take care not to deform the spark plug tube.
^ After press-fitting, wipe off any liquid gasket protruding onto the cylinder-head upper face.

11. Install the spark plugs.