Measuring Camshaft Runout; Inspecting Camshaft Bearing Journal; Measuring Camshaft Lobe Height; Measuring Camshaft To Cylinder Head Clearance - Arctic Cat 450 XC 2011 Service Manual

4. If any measurement exceeds the limit, the cylinder
and piston must be replaced.

Measuring Camshaft Runout

 NOTE: If the camshaft is out of tolerance, it must be
replaced.
1. Place the camshaft on a set of V blocks; then position
the dial indicator contact point against the shaft and
zero the indicator.
2. Rotate the camshaft and note runout; maximum tol-
erance must not exceed specifications.

Measuring Camshaft Lobe Height

1. Using a calipers, measure each cam lobe height.
2. The lobe heights must not exceed minimum specifi-
cations.
36
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.
CC390D
2. Place a strip of plasti-gauge in each of the camshaft
lands in the cylinder head.
3. Place the valve cover on the cylinder head and secure
with the valve cover cap screws. Tighten securely.
 NOTE: Do not rotate the camshaft when measuring
clearance.
4. Remove the cap screws securing the valve cover to
the cylinder; then remove the valve cover and cam-
shaft.
CC283D
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 clearance.
ATV1013A
Manual
Table of Contents
CC005D
MD1261