GMC 1990 Light Truck Repair Manual page 456

6A3-14 4.3 LITER V-6
20. Valve Keeper
21. Cap
22. Shield
23. O-Ring Seal
24. Seal
25. Damper
25
i T
20 28 22 23
Figure 19—Valves and Components
26.
27.
28.
29.
B-07609
CLEANING AND INSPECTION OF COMPONENTS
Refer to GENERAL ENGINE MECHANICAL (SEC. 6A)
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and perform the following.
Clean
Components as outlined.
Inspect
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Components as outlined.
Measure
%
• Valve stem clearance.
• Valve spring tension and free length.
Other information outlined includes:
• Valve and seat grinding.
• Valve guide reaming.
ROCKER ARM STUD REPLACEMENT
Remove or Disconnect (Figure 21)
Tool Required:
J 5802-01, Rocker Arm Stud Remover
Figure 21—Removing the Rocker Arm Stud