TM 5-4310-451-14
5-27. VALVE SEAT INSERT REPLACEMENT (Con’t).
b. INSTALLATION
WARNING
Wear protective gloves and clothing to prevent Injury when handling heated parts.
NOTE
All 12 valve seat Inserts are Installed same way.
1.
Place cylinder head (1) in water heated to
temperature of 180°F-200°F (82°C-930C) for not
less than 30 minutes.
2. Support cylinder head (1) with bottom side up
and place valve seat insert (3) with seat side up
In counterbore (5).
3. Install valve seat insert (3) into cylinder head (1)
until seated using valve seat Insert installer (4).
4. Set dial indicator on cylinder head (1) and check
roundness of valve seat insert (3) relative to
valve guide. Total runout must not exceed 0.002
in.(0.
mm).
5. If runout exceeds 0.002 In. (0.051 mm), check
valve guide for damage.
FOLLOW-ON TASKS:
•
Install cam follower assemblies and pushrods (see paragraph 5-
•
Install exhaust valves (see paragraph 5-24).
•
Install fuel injectors (see paragraph 5-57).
•
Install exhaust valve bridges (see paragraph 5-26).
•
Install rocker arms (see paragraph 5-41).
TA704935
5-53
