1. Disconnect and isolate the negative battery cable (1).
2. Remove the air cleaner housing (5) and clean air tube (1). Refer to BODY, AIR CLEANER, INSTALLATION.
3. Remove the cylinder head covers. Refer to COVER(S), CYLINDER HEAD, REMOVAL.
CAUTION: The piston must be at TDC, and both valves closed on the cylinder to be serviced.
NOTE: The intake push rods can fall into the engine and become lodged in the oil pan, if removing intake rocker arm shaft, install the pushrod retainer (special tool #9070, Retainer, Push Rod) (1) to retain the intake push rods (2).
4. Install the pushrod retainer (special tool #9070, Retainer, Push Rod) (1) onto the cylinder head.
5. Clip the pushrods (2) into the pushrod retainer (1).
6. Using the sequence shown in illustration, remove the rocker arm shaft bolts and remove the rocker arm shaft.
7. Install the rocker arm shaft adapter (special tool #9065C, Compressor, Valve Spring) (1).
8. Insert an air hose (2) into the spark plug hole and charge the cylinder with air.
NOTE: All valve springs and seals are removed in the same manner.
NOTE: Tap the top of the valve spring retainer to loosen the spring retainer locks.
9. Install the valve spring compressor (special tool #9065C, Compressor, Valve Spring) (1) and remove the intake valve retainer locks.
10. Release the valve spring compressor and remove the valve springs.
11. Install the valve spring compressor (special tool #9065C, Compressor, Valve Spring) (2) and the rocker arm adapter (special tool #9065-3, Adapter, Valve Spring Compressor) (1) and remove the exhaust valve retainer locks.
12. Release the valve spring compressor and remove the valve spring.
NOTE: The valve springs are interchangeable between intake and exhaust.
13. Remove and discard the valve guide seal.