Assembly
VALVES, VALVE SPRINGS AND VALVE SEALS INSTALLATION1. Coat the valve stems with engine oil. Install the valves in the valve guides.
2. Check that the valves move up and down smoothly.
3. Install the spring seats on the cylinder head.
4. Install the new valve seals (A) using the valve guide seal installer (B).
NOTE: Exhaust valve seal (C) has a black spring (D), and intake valve seal (E) has a white spring (F). They are not interchangeable.
5. Install the valve spring and valve retainer. Place the end of the valve spring with closely wound coils toward the cylinder head.
6. Install the valve spring compressor. Compress the spring and install the valve keepers.
7. Lightly tap the end of each valve stem two or three times with a plastic mallet (A) to ensure proper seating of the valve and valve keepers. Tap the valve stem only along its axis so you do not bend the stem.
CAMSHAFT/ROCKER ARMS, CAMSHAFT SEAL, AND PULLEY INSTALLATION
Special Tools Required
- Seal Guide 07NAG-PT0010A
- Installer Cup 07NAF-PT0010A
- Installer Shaft 07NAF-PT0020A
NOTE:
- To prevent the rocker arm assembly from coming apart, leave the camshaft holder bolts in the holes.
1. After wiping down the camshaft and the journals in the cylinder head, lubricate both surfaces and install the camshaft.
2. Clean and install the oil control orifice (A) with a new O-ring (B).
3. Turn the camshaft until its keyway (C) is facing up. (No.1 piston Top Dead Center (TDC).
4. Loosen all the valve adjusting screws.
5. Apply liquid gasket to the head mating surfaces (the shaded areas) of the No. 1 and No. 5 camshaft holders.
6. Set the rocker arm assembly in place and loosely install the bolts. Make sure that the rocker arms are properly positioned on the valve stems.
7. Install the camshaft oil seal (A) using the special tools as shown.
8. Make sure all the rocker arms are aligned with the valves.
9. Tighten each bolt two turns at a time, in the sequence shown, to ensure that the rockers do not bind on the valves.
Specified torque:
8 mm bolts: 22 Nm (2.2 kgf.m, 16 ft. lbs.)
6 mm bolts: 12 Nm (1.2 kgf.m, 8.7 ft. lbs.)
6mm bolts: (11), (12), (13), (14)
10. Check the back cover rubber seal for cranks and other damage.
NOTE:
- If the rubber seal is coming off, reattach it with liquid gasket. Wipe off any excess liquid gasket.
- When replacing the seal, clean the lower cover groove, cut the repair strip to length, and press the new piece into the groove evenly.
- After installing the rubber seal, check the joints. Apply liquid gasket if there is any gap or opening.
11. Install the back cover (A).
12. Install the camshaft pulley (B) onto the camshaft, then tighten the retaining bolt to the torque shown.