Page 196
REPAIR INSTRUCTIONS
199
Figure 199 — Checking Valve Seat Runout
6. After checking runout, determine the
position of contact between the valve and
valve seat insert. Apply a dab of Prussian
Blue to the valve face at four points,
90 degrees apart.
7. Lower stem of the valve into the valve guide
and allow the valve face to rest on the seat
insert. Rotate the valve 90 degrees on the
insert. Carefully remove the valve without
making contact with the valve face. Properly
ground inserts should show a full pattern of
contact on the insert.
Thoroughly clean the cylinder head after
checking the valve seat inserts and before
installing the valves.
Valve Spring Inspection
[213 MB]
1. Visually inspect the inside surfaces of the
spring coils. Also, feel the inside surfaces of
each spring for any indication of roughness
or grooving. If either of these conditions
exist, replace the spring.
2. Check springs on the universal spring tester
J 22738-02 as shown in Figure 200. With
springs compressed to 1.5 inches
(38.1 mm), the pressure should be within
specification, 190–210 lb (86.2–95.3 kg).
If spring pressure does not meet specification,
replace the spring.
200
Figure 200 — Checking Valve Spring Pressure
1. Arbor
2. Valve Guides
1. Spring Tester J 22738-02
2. Valve Spring
5_106_00.bk Page 196 Friday, August 4, 2000 11:17 AM
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