Arctic Cat Wildcat ROV 2013 Service Manual page 38

3. Acceptable diameter range (exhaust valve) must be
within specifications.
Measuring Valve Face/Seat Width
1. Using a micrometer, measure the width of the valve
face.
2. Acceptable width range must be within 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 outside
edge of the valve face; then zero the indicator.
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.
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.
3. Push the valve from side to side; then from top to bottom.
4. Maximum "wobble" deflection must not exceed spec-
ifications.
Measuring Valve Guide
(Inside Diameter)
ATV-1004
1. Insert a suitable bore gauge 1/2 way into each valve
guide bore and record the measurement.
2. Acceptable inside diameter range must be within
specifications.
3. If a valve guide is out of tolerance, it must be
replaced.
Servicing Valves/Valve Guides/Valve
Seats
If valves, valve guides, or valve seats require servicing or
replacement, Arctic Cat recommends the components be
taken to a qualified machine shop for servicing.
If valves are discolored or pitted or if the seating sur-
face is worn, the valve must be replaced. Do not attempt
to grind the valves or severe engine damage may occur.
Measuring Rocker Arm
(Inside Diameter)
1. Using a dial calipers, measure the inside diameter of
ATV1082A
the rocker arm.
2. Acceptable inside diameter must not exceed specifica-
tions.
Measuring Rocker Arm Shaft
(Outside Diameter)
1. Using a micrometer, measure the outside diameter of
the rocker arm shaft.
2. Acceptable outside diameter must be at or above spec-
ifications.
Installing Valves
1. Apply grease to the inside surface of the valve seals;
then place a lower spring seat and valve guide seal
over each valve guide.
CAUTION
CC131D
35