Honda GX270H Manual page 135

62Z7B000.book 4 ページ ２０１２年９月２７日 木曜日 午前１０時２１分
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CYLINDER HEAD/VALVES
CYLINDER HEAD DISASSEMBLY/
ASSEMBLY
Remove the cylinder head (page 13-3).
VALVE SPRING RETAINER
REMOVAL:
Push down and slide the valve spring retainer [1]
to the side so that the valve stem [2] slips
through the hole at the side of the valve spring
retainer.
Do not remove the valve spring retainers while
the cylinder head is installed to the cylinder
barrel, or the valve will drop into the cylinder.
INSTALLATION:
Do not interchange the intake and exhaust
retainers.
IN EX
SPARK PLUG
18 N·m (1.8 kgf·m, 13 lbf·ft)
VALVE SPRING SEAT
VALVE GUIDE CLIP
ROTATOR
ROCKER ARM PIVOT
LOCK NUT (2)
10 N·m (1.0 kgf·m, 7 lbf·ft)
ROCKER ARM
PIVOT (2)
(Apply to the
threads and pivot)
13-4
[1]
EXHAUST VALVE GUIDE
PUSH ROD
GUIDE PLATE
PUSH ROD (2)
ROCKER ARM PIVOT
BOLT (2) ASSEMBLY:
24 N·m (2.4 kgf·m, 18 lbf·ft)
Before installing the push rods, check the ends of the push
rods for wear.
Be sure the ends of the push rods are firmly seated in the
valve lifters.
(Apply to the
tappet surface
and pivot)
VALVE ROCKER ARM
ASSEMBLY:
Before installing the rocker arm, check for wear on
the surfaces of the rocker arm that contact the pivot
bolt, push rod, and valve stem.
EXHAUST VALVE
(Sliding surface and stem end)
[2]
ASSEMBLY:
Do not interchange with the intake valve.
The exhaust valve is smaller than the
intake valve.
CYLINDER HEAD
INTAKE VALVE
(Sliding surface and stem end)
ASSEMBLY:
Do not interchange with the
exhaust valve.
The intake valve is larger than
the exhaust valve.
INTAKE VALVE GUIDE
SHROUD
VALVE STEM SEAL
CT BOLT (6 x 12 mm)
VALVE SPRING (2)