bushing is severely worn, inspect the bushing bore
in the cylinder head. The surface should be smooth
with no visible marks. Replace the cylinder head if
this surface is worn.
3. Visually inspect the camshaft bearing journals
(A,
Figure 38
) for wear and scoring. Replace as
necessary.
4. Check the camshaft lobes (B,
Figure 38
) for
wear. The lobes should not be scored and the edges
should be square. Slight damage can be removed
with silicon carbide oil stone. Use No. 100-120 grit
initially, then polish the lobe with No. 280-320 grit.
5. Even if the cam lobe surfaces appears satisfac-
tory, they must be measured with a micrometer.
100
CHAPTER FOUR
1. Rocker shaft bolt
2. Washer
3. Rocker shaft
4. Adjuster locknut
5. Valve adjuster
6. Rocker arm
7. Cylinder head
8. Camshaft
9. Pin
10. Bushing
11. Bushing retainer
12. Retainer bolt
35
36
37