Arctic Cat ROV 2013 Service Manual page 31

1. Using a valve spring compressor, compress the valve
springs and remove the valve cotters. Account for an
upper spring retainer.
2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
NOTE: The valve seals must be replaced.
3. Remove the valve springs; then invert the cylinder
head and remove the valves.
Measuring Valve Stem Runout
1. Support each valve stem end with the V Blocks; then
check the valve stem runout using a dial indicator.
2. Maximum runout must not exceed specifications.
Measuring Valve Stem Outside
Diameter
1. Using a micrometer, measure the valve stem outside
diameter.
28
2. Acceptable diameter range must be within specifica-
tions.
Measuring Valve Face/Seat Width
1. Using a micrometer, measure the width of each valve
face.
CC132D
2. Acceptable width range (intake valves) must not
exceed specifications.
3. Acceptable width range (exhaust valves) must not
exceed specifications.
Measuring Valve Face Radial Runout
1. Mount a dial indicator on the surface plate; then
place the valve stem on a set of V blocks.
2. Position the dial indicator contact point on the out-
side edge of the valve face; then zero the indicator.
CC136D
3. Rotate the valve in the V blocks.
4. Maximum runout must not exceed specifications.
Measuring Valve Guide/Valve Stem
Deflection (Wobble Method)
1. Mount a dial indicator and base on the surface plate;
then place the cylinder head on the surface plate.
ATV-1082 2. Install the valve into the cylinder head; then position
the dial indicator contact point against the outside
edge of the valve face. Zero the indicator.
ATV-1004
ATV1082A