Valve Spring: Service and Repair

SPRINGS-VALVE

REMOVAL





1. Disconnect negative battery cable.
2. Remove air cleaner assembly.
3. Remove air intake resonator.
4. Remove spark plug cables.
5. Remove ignition coil connectors (1).
6. Remove ignition coils (2).





7. Remove one spark plug.





8. Remove cylinder head cover (1) using the sequence shown.





CAUTION: The piston must be at TDC, and both valves closed on the cylinder to be serviced.

NOTE: If removing intake valve spring, install special tool# 9070, pushrod retaining plate (1), to retain the intake pushrods; (2).





9. Remove exhaust/intake rocker arm shafts using the sequence shown.











10. Install rocker arm shaft (1) special tool# 9065.





11. Install spring compressor (1,3,), special tool# 9065, and exhaust adapter arm (1) tool # 9065if needed.





NOTE: All valve springs and seals are removed in the same manner.

12. Insert air hose (1) into spark plug hole and charge cylinder with air.

NOTE: Tap the top of the valve spring retainer to loosen the spring retainers locks.

13. Compress valve spring with valve spring compressor (3) tool # 9065and remove valve retainer locks.
14. Release spring compressor (3) and remove valve spring.

NOTE: The valve springs are interchangeable between intake and exhaust.

15. Remove valve seal.

INSTALLATION











NOTE: The intake seal has a smaller spring seat diameter compared to the exhaust seal.

1. Install valve seal.

NOTE: The intake spring damper has a longer free length compared to the exhaust spring damper.

2. Install valve spring.





3. Using special tool# 9065 (1,3,), compress valve spring and install valve spring retainer and locks.
4. Release air charge in cylinder (1).
5. Remove spring compressor tool # 9065 (3).

CAUTION: Verify that the pushrods are fully seated into lifter and rocker arm. Recheck after rocker arm shaft has been torqued to specification.





6. Install rocker arm shaft and pushrods.
7. Tighten the rocker shaft bolts to 22 Nm (195 inch lbs.) torque, using the rocker shaft torque sequence.





8. Remove special tool# 9070, pushrod retaining plate (1), if used.





9. Install cylinder head cover (1).





10. Tighten cylinder head cover bolts and double ended studs.
11. Install spark plugs.





12. Install ignition coil on plug (2), and torque fasteners (3) to 12 Nm (105 inch lbs.)
13. Install ignition coil connectors (1).
14. Install spark plug cables.
15. Install air intake resonator.
16. Install air cleaner assembly.
17. Connect negative battery cable.