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TM9-2815-202-34
NOTE
Insert counterbore has a diameter of 1.2600 to 1.2610 inches and a depth of 0.3380 to
0.3520 inch. Counterbores must be concentric with valve guides within 0.003 inch total
indicator reading.
(d) Immerse cylinder head in water heated to 180o-200oF (82°-93oC) for 30 minutes or cool
insert with liquid nitrogen.
NOTE
Install insert in cylinder head while head is still hot and insert is at room temperature or
when insert is chilled and head is at room temperature.
(e)
(9
(9)
Place cylinder head on a bench with bottom side up. Place insert in counterbore with
valve seat side facing up.
Using insert installer (82), drive insert in place until it seats solidly in cylinder head.
Check exhaust valve seat inserts for concentricity in relation to valve guides using insert
runout gage (83).
NOTE
Exhaust valve seat inserts are prefinished. Only check for concentricity after
installation. Grind insert only if runout exceeds 0.002 inch.
4-195
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