Figure 11B-58. R e m o v i n g Broken Exhaust Valve Bridge
tom of the collet is flush with the bottom
1. Start the guide (undercut end first)
of the insert.
into the cylinder head.
3. Hold the collet handle and turn the T
2. Place the installer J 7482 over the
Handle to expand the collet cone until
guide and drive it into place. The in-
the insert is held securely by the tool.
staller will properly position the guide to
the correct height in the cylinder head
4.
Insert
the
drive
bar
of
the
tool
(2.040").
through the valve guide.
5. Tap the drive bar once or twice to
I n s p e c t Exhaust Valve Seat Insert
move the insert about 1/16" away from
its seat in the cylinder head.
A
new
exhaust
valve
insert
is
pre-ground and only needs to be
6. Turn the T handle to loosen the collet
checked for concentricity after installa-
cone and move the tool into the insert
tion. do not grind a new insert unless
slightly so the narrow flange at the bot-
the runout exceeds 0.002".
tom of the collet is below the valve seat
insert.
Inspect the valve seat inserts for exces-
sive wear, pitting, cracking or an im-
7. Tighten the collet cone and continue
proper seat angle. The proper angle for
to drive the insert out of the cylinder
the seating face of the valve is 30 and
head.
the angle for the insert is 31.
R e m o v e Exhaust Valve Seat Insert
The valve seat inserts are pressed into
the cylinder and must be removed as out-
lined in the following procedure to avoid
damage to the cylinder head:
1. Place the cylinder head on its side as
s h o w n in Figure 11B-59 on page 11B-39.
2 . Place the collet of tool J 6567-02 inside
of the valve seat insert so that the bot-
F i g u r e 11B-59. Removing Valve Seat
Insert
