Explorer Patriot 430, Service Manual

Page: 84 / 235

6. Valve Stem Replacement
Heat up cylinder head to 100~150
ഒ
with
heated plate or toaster.
Caution
Do not let torch heat cylinder head directly.
Otherwise, the cylinder head may be deformed
when heating it.
Wear on a pair of glove to protect your hands
when operating. Hold the cylinder head, and
then push out old valve guide from combustion
chamber side.
Tool: Valve guide driver: 5.0 mm
Caution
Check if new valve guide is deformed after
pressed it in.
When pressing in the new valve guide, cylinder
head still have to be kept in100~150 . Adjust
the valve guide driver and let valve guide height
within 13 mm. Press in new valve guide from
rocker arm side.
Tool: Valve guide driver: 5.0 mm
Wait for the cylinder head cooling down to room
temperature, and then correct the new valve
guide with reamer.
Caution
Use cutting oil when correcting valve guide with
a reamer.
Turn the reamer in same direction when it be
inserted or rotated. Correct valve seat, and
clean up all metal residues from cylinder head.
Tool: Valve guide reamer: 5.0 mm
Valve guide driver
5.0mm
Valve guide driver
5.0mm
Valve guide reamer 5.0mm