Valve Guide Replacement - Honda GX240RT2 Service And Repair Manual

CYLINDER HEAD/VALVES
VALVE SPRING PERPENDICULARITY
Measure the valve spring perpendicularity.
SERVICE LIMIT:
If the measured perpendicularity is more than the
service limit, replace the valve spring
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 REPLACEMENT

Chill the replacement valve guides in the freezer
section of a refrigerator for about an hour.
Use a hot plate or oven to heat the cylinder head evenly
to 150°C (300°F).
To avoid burns, use heavy gloves when han-
dling the heated cylinder head.
• Do not use a torch to heat the cylinder head;
warpage of the cylinder head may result.
• Do not get the cylinder head hotter than 150°C
(300°F); excessive heat may loosen the valve seat.
Remove the heated cylinder head from the hot plate
and support it with wooden blocks.
gx240ut2_gx270ut2_gx340ut2_gx390ut2
1.5°
(page 12-4).
(page 12-4).