FRAME 21 - TM-9-2815-210-34-2-20252

TM 9-2815-210-34-2-2

FRAME

NOTE

I f no intake valve seat inserts (1) were taken out, go

to frame 23.

T w o sizes of intake valve seat inserts (1) are used in

t h e s e cylinder heads (2). Cylinder head can use a

c o m b i n a t i o n of intake valve seat insert sizes. Measure

e a c h intake valve seat counterbore (3) to tell whether

to put in a standard size or oversize intake valve seat

insert.

Readings must be within limits given in table 4-48.

T h e letter T shows a tight fit. If readings are not

within given limits, throw away part and get a new one.

M e a s u r e and note inside diameter of three intake valve seat counterbores (3).

If diameter is 2.0580 to 2.0595 inches, this is a standard size intake valve seat

c o u n t e r b o r e . If diameter is 2.0680 to 2.0695 inches, this is a 0.0100 oversize

i n t a k e valve seat counterbore.

NOTE

Used intake valve seat inserts (1) that were not worn

w e r e tagged so they can be put back in the same place.

B e c a u s e machine shop may have machined some standard

s i z e intake valve seat counterbores (3) into oversize in-

t a k e valve seat counterbores, some intake valve seat

inserts may now be too small.

Measure and note outside diameter of each intake valve seat insert (1) to be

put in. S t a n d a r d size intake valve seat inserts go in standard size intake

v a l v e s e a t c o u n t e r b o r e s ( 3 ) . For 0.0100-inch oversize intake valve seat

c o u n t e r b o r e s , use 0.0100inch oversize intake valve seat inserts. Refer to

t a b l e 4-48 for sizes of intake valve seat inserts.

3 . Measure fit of each intake valve seat insert (1) in its intake valve seat counter-

bore (3).

GO TO FRAME 22

4-232