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 TM 10-3930-660-24-2
CYLINDER HEAD ASSEMBLY REPAIR - CONTINUED
0270 00
REPAIR - CONTINUED
2.
Measure valve rim thickness.
Limit
A
Minimum (A)
0.031 in. (0.787 mm)
409-864
3.
If rim thickness is less than 0.031 in. (0.0787 mm) after grinding, replace valve.
4.
Mark valves again respective to their location in the cylinder head.
5.
If valve guide bores are scratched, scored, burned or
worn, the guide bores must be machined and service
valve guides installed.
409-865
6.
To install service valve guides (thin wall intake and exhaust guides), machine cylinder head parent metal valve guide
bores (B) to 0.4375 to 0.4385 in. (11.11 to 11.13 mm) diameter.
7.
To install service valve guides (thick wall intake) and
3904409 (thick wall exhaust), machine cylinder head
base metal valve guide bores (B) to 0.5507 to 0.5517
in. (13.98 to 14.01 mm) diameter.
B
409-866
0270 00-6
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