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 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
- Remove spark plug.
- Remove valve lifter.
- Identify installation positions, and store them without mixing them up.
- 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.
- Remove valve spring retainer, valve spring and valve spring seat.
- Push valve stem to combustion chamber side, and remove valve.
- Identify installation positions, and store them without mixing them up.
- Remove valve oil seals using Tool.
Tool number : KV10107902 (J-38959)
- If valve seat must be replaced, refer to See: Inspection.
- If valve guide must be replaced, refer to See: Inspection.
- 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
- When valve guide is removed, install it. Refer to See: Inspection.
- When valve seat is removed, install it. Refer to See: Inspection.
- Install valve oil seals using Tool.
- Install valve spring seat.
- Install valves.
- Install it in the original position.
NOTE:
Larger diameter valves are for intake side.
- Install valve spring (uneven pitch type) with narrow pitch end (paint mark) to cylinder head side (valve spring seat side).
- Install valve spring retainer.
- 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.
- Install valve lifter.
- Install it in the original position.
- Install spark plug tube.
- Press-fit spark plug tube as follows:
- Remove old liquid gasket adhering to cylinder head mounting hole.
- 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.
- 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.
- Install spark plug.
|