TM 5-3805-248-23-2
VALVES AND SPRINGS MAINTENANCE - CONTINUED
0263 00
REPAIR - CONTINUED
17.
Install valve in cylinder head and turn lightly. Allow valve face to ride on valve seat (6).
18.
Remove valve.
19.
Inspect valve. If blue is transferred to center of valve face, contact is good. If blue is transferred to top of valve face,
grind valve seat (6). If blue is transferred to bottom edge of valve face, grind valve.
NOTE
Installation of a new valve may bring
valve recess within specifications.
CYLINDER HEAD
Replace valve seat if resurfacing of
valve seat and replacement of valve
does not bring recess or protrusion
within specification.
Steps 18 through 29 cover valve seat
replacement and are only necessary if
resurfacing cannot bring old valve
VALVE
seat within specification.
20.
Using valve seat extractor tool group, grind a groove
around the inner bore of valve seat (6).
21.
Install collet from valve seat extractor tool group and
expand in groove.
VALVE
6
22.
Attach proper extractor from valve seat extractor tool
SEAT BORE
group to collet.
23.
Remove valve seat (6), as necessary, from cylinder
head.
24.
Remove tooling from valve seat (6).
25.
Remove burrs from valve seat bore in cylinder head.
26.
Use ice to lower temperature of new valve seat (6).
CAUTION
When installing new valve seats, never expand the diameter of collet.
27.
Use valve seat extractor tool group to install new valve seat (6) in bottom of cylinder head.
28.
Drive new valve seat (6) into place, if necessary.
29.
Remove valve seat extractor tool group from new valve seat (6).
30.
Repeat steps 13 through 17.
31.
Repeat steps 10 through 17 until valve and valve seat (6) are within specification.
0263 00-6
