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. 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, Inspection After Disassembly.
6. When valve guide must be replaced, 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.

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





3. Install new valve oil seal to the specified height as shown, using
Tool.






4. Install valve.
- Install larger diameter to intake side.





5. Install valve spring [with valve spring seat (1)].
- A: Identification color
- B: Cylinder head
Arrow Indicates To cylinder head
- Install smaller pitch spring end (valve spring seat side) to cylinder head side.
- Confirm the identification color of the valve spring.






Intake spring identification color : Blue
(M/T models)
Exhaust spring identification color : Yellow
(M/T models)
6. Install valve spring retainer.





7. Install valve collet using Tool.






- Install valve collet with a magnet hand.

CAUTION:
When working, be careful not to damage valve lifter holes.
- Tap valve stem edge lightly with a plastic hammer after installation to check its installed condition.
8. Install valve lifter.





9. Install the spark plug tube, if removed. Press-fit the spark plug tube into the cylinder head using the following procedure:
a. Remove old sealant from cylinder head side installation hole.
b. Apply sealant all round on spark plug tube within approximately
12 mm (0.47 in) width from edge of spark plug tube on the press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Fluid Type Specifications c. Press-fit the spark plug tube to specified height "H" as shown, using suitable tool.
Standard press-fit height "H" : 41.2 - 42.2 mm (1.622 - 1.661 in)

CAUTION:
- When press-fitting, be careful not to deform spark plug tube.
- After press-fitting, wipe off any protruding sealant on top surface of cylinder head.
10. Install spark plug. Service and Repair.