(d) Repair minor damage to the cylinder
tool. Allow valve guide to remain 0.3437-inch from top of
head castings using a fine file, emery cloth, or crocus cloth
(d) Ream the replacement valve guide, if
necessary, to obtain proper valve stem-to-valve guide
using a proper size tap. Do not enlarge the threaded hole.
If minor damage cannot be repaired, replace cylinder head
casting (16) and valve seats (7). Salvage all other usable
warped stem, pitting, evidence of burning and excessive
wear. Replace valves if badly damaged or if valve stem is
(e) Inspect studs (11) for stripped or worn
threads, or a bent or loose connection. Replace studs if
damaged, using anti-seize compound (item 5, Appen-
dix E). Tighten rocker arm studs to 35-40 lb.-ft.
(2) Valve Guide and Valve.
If grinding on valve face produces a valve
with a thin edge, replace with a new valve.
(a) Check for valve stem-to-valve guide
allowable clearance by measuring inside diameter of valve
(f) Repair valves that can be refaced
guide (6 and 9, fig. 7-55) and outside diameter of the valve
stem. Refer to table 7-2 for correct dimensions.
(3) Valve Seat.
(a) Inspect valve seats. Reface valve seats if
If valve stem Is worn below minimum toler-
seat face is slightly pitted, burned, or worn and can be
ances, replace the valve. If new valve fails to
correct stem-to-valve guide clearance, re-
loose, they must be replaced as follows:
place valve guide.
(b) Secure valve seat remover cutter tool
(b) Using Correct size valve guide driver tool
in a drill press chuck and adjust tool
1/64-inch from outside edge of valve seat.
(c) Install new replacement valve guide
(c) Apply oil to pilot end of cutting tool to
through top of cylinder head using the valve guide driver
Figure 7-56. Valve Face and Valve Seat Grinding Requirements.