Honda GP160H Manual page 95

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CYLINDER HEAD
PUSH ROD RUNOUT
Check both ends of the push rod for wear.
Check the push rod for straightness.
If necessary, replace the push rod.
VALVE GUIDE REAMING
For best results, be sure the cylinder head is at room
temperature before reaming valve guides.
Coat the reamer and valve guide with cutting oil.
TOOL:
Valve guide reamer 5.510 mm [1] 07984-2000001
Rotate the reamer clockwise through the valve guide
the full length of the reamer.
• Turn the special tool (valve guide reamer) clockwise,
never counterclockwise.
• Continue to rotate the special tool while removing it
from the valve guide.
Thoroughly clean the cylinder head to remove any
cutting residue.
Check the valve guide bore; it should be straight, round
and centered in the valve guide. Insert the valve and
check operation. If the valve does not operate
smoothly, the guide may have been bent during
installation.
Replace the cylinder head if it is bent or damaged
(page 12-4).
Check the valve stem-to-guide clearance (page 12-7).
12-8
COMBUSTION
CHAMBER SIDE
VALVE SPRING SIDE
HANDLE
(Commercially
available)
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