Disassembly and Assembly
Disassembly and Assembly
CAUTION:
- When installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting surface with new engine oil.
- Apply new engine oil to threads and seat surface when installing cylinder head, camshaft sprocket, crankshaft pulley and camshaft bracket.
- Note valve lifter positions so as to ensure proper installation locations.
DISASSEMBLY
1. Remove intake manifold assembly.
2. Remove adjusting shims (if equipped) and valve lifters.
- Note locations for installation.
3. Remove valve collet.
- Compress valve spring using Tool as shown. Remove valve collet with magnet.
4. Remove valve spring retainer and valve spring.
5. Push valve stem through the combustion chamber side, and remove valve.
- Inspect valve guide clearance before removal. Refer to VALVE GUIDE CLEARANCE.
- Label components for installation in the same location.
6. Remove valve oil seal using Tool as shown.
7. Remove valve spring seat.
8. When valve seat must replaced, refer to REPLACING VALVE SEAT FOR SERVICE PARTS.
9. When valve guide must be replaced, refer to VALVE GUIDE REPLACEMENT.
10. Remove spark plugs.
11. Remove engine coolant temperature sensor.
CAUTION: Do not shock it.
12. Remove spark plug tubes, as necessary.
- Using a pair of pliers, pull spark plug tube out of cylinder head.
CAUTION:
- Take care not to damage cylinder. head.
- Spark plug tubes are deformed during removal and cannot be reused once removed. Do not remove unless necessary.
ASSEMBLY
1. If removed, install valve seat, refer to REPLACING VALVE SEAT FOR SERVICE PARTS.
2. If removed, install valve guide, refer to VALVE GUIDE REPLACEMENT.
3. Install valve oil seal using Tool as shown.
4. Install valve spring seat.
5. Install valve.
- Install large diameter to intake side.
6. Install valve spring.
7. Install valve spring retainer.
8. Install valve collet.
- Compress valve spring using Tool as shown. Install valve collet with magnet.
- Tap stem edge lightly with plastic hammer after installation to check if installed securely.
9. Install adjusting shim, if equipped in their original positions.
10. Apply sealant to engine coolant temperature sensor threads.
- Use Genuine Anaerobic Liquid Gasket, or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS.
11. Install engine coolant temperature sensor.
12. Install spark plug tube.
- Press-fit spark tube as follows.
a. Remove old liquid gasket adhering to cylinder-head mounting hole.
b. Apply liquid gasket to area within approximately 15 mm (0.59 inch) from edge of spark plug tube press-fit side as shown.
^ Use Genuine Anaerobic Liquid Gasket, or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS.
c. Using a drift, press-fit the spark plug tube so that its height H is as shown.
Standard press-fit height H: 41.0 - 42.0 mm (1.61 - 1.65 inch)
CAUTION:
^ When press-fitting, take care not to deform spark plug tube.
^ After press-fitting, wipe off liquid gasket protruding onto cylinder head upper surface.
13. Install spark plugs. Refer to OUTER COMPONENT PARTS.
14. Install intake manifold. Refer to OUTER COMPONENT PARTS.