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TM 10-3930-638-24&P
4-2. ENGINE MAINTENANCE (cont)
b. Cylinder Head and Valves (cont).
LOCATION
ITEM
REMARKS
STEP
ACTION
INSPECTION AND REPAIR (cont)
NOTE
(cont)
If valve seat inserts (14) require replacement perform steps b and
c below; otherwise proceed to step d below.
CAUTION
Don't remove valve seat inserts (14) with punch, chisel or pry bar
as damage to cylinder head will result.
b. Valve seat
Use seat removal tool or machine inserts
Remove
insert (14)
out of cylinder head
Clean valve seat insert recesses in cylinder
c. Valve seat
Cool and
insert (14)
install
head. Place new inserts in dry ice to shrink
them, then install by pressing into
cylinder block until bottomed in recess
d. Intake valve
Install and
Check as shown below. If protrusion is
(7) and exhaust
more than 0.005 inch, valve and seat must
check valve
valve (6)
be ground. Refer to intake and exhaust
protrusion
valves and valve seat refacing following
4-15

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