CYLINDER HEAD

Disassembly and Assembly

• 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 surface when installing cylinder head, camshaft sprocket, crankshaft pulley, and camshaft bracket.
• Attach tags to valve lifters so as not to mix them up.

DISASSEMBLY

1. Remove spark plug.
2. Remove valve lifter.

• Identify installation positions, and store them without mixing them up.

3. Remove valve collet.

• Compress valve spring and remove valve collet with magnet hand using Tool.

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

4. Remove valve spring retainer, valve spring and valve spring seat.
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 seals using Tool.

Tool number : KV10107902 (J-38959)

7. If valve seat must be replaced, refer to See: Inspection.
8. If valve guide must be replaced, refer to See: Inspection.
9. Remove spark plug tube, as 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. Do not remove it unless absolutely necessary.

ASSEMBLY

1. When valve guide is removed, install it. Refer to See: Inspection.
2. When valve seat is removed, install it. Refer to See: Inspection.

3. Install valve oil seals using Tool.

4. Install valve spring seat.
5. Install valves.

• Install it in the original position.

NOTE:
Larger diameter valves are for intake side.

6. Install valve spring (uneven pitch type) with narrow pitch end (paint mark) to cylinder head side (valve spring seat side).
7. Install valve spring retainer.

8. Install valve collet.

• Compress valve spring with valve spring compressor, attachment and adapter using Tool. Install valve collet with magnet hand.

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

• Tap valve stem edge lightly with plastic hammer after installation to check its installed condition.

9. Install valve lifter.

• Install it in the original position.

10. Install spark plug tube.

• Press-fit spark plug tube as follows:

1. Remove old liquid gasket adhering to cylinder head mounting hole.
2. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.

Use Genuine High Strength Locking Sealant or equivalent. Refer to See: Specifications\Fluid Types.

3. Press-fit spark plug tube so that its height (H) is as specified in using suitable drift.

Press-fit height (H) : 37.7 - 38.7 mm (1.484 - 1.529 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.

11. Install spark plug.