46
CC283D
2. Rotate the camshaft and note runout; maximum
tolerance must not exceed specifications.
Measuring Camshaft Lobe Height
1. Using a calipers, measure each cam lobe height.
ATV1013A
2. The lobe heights must not exceed minimum speci-
fications.
Inspecting Camshaft Bearing
Journal
1. Inspect the bearing journal for scoring, seizure
marks, or pitting.
2. If excessive scoring, seizure marks, or pitting is
found, the cylinder head assembly must be
replaced.
Measuring Camshaft to
Cylinder Head Clearance
1. Loosen the jam nuts and adjuster screws.
CC005D
2. Place a strip of plasti-gauge in each of the cam-
shaft lands in the cylinder head.
3. Place the tappet cover on the cylinder head and
secure with the cover cap screws. Tighten to 8
ft-lb.
NOTE: Do not rotate the camshaft when measur-
ing clearance.
4. Remove the cap screws securing the cylinder head
cover to the cylinder; then remove the cover and
camshaft.
MD1261
5. Match the width of the plasti-gauge with the chart
found on the plasti-gauge packaging to determine
camshaft to cylinder head and valve cover clear-
ance.
CC145D
6. If clearance is excessive, measure the journals of
the camshaft.