Arctic Cat 2014 450 Service Manual page 46

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
specifications.
Measuring Valve Guide
(Inside Diameter)
1. Insert a snap gauge 1/2 way down into each valve
guide bore; then remove the gauge and measure it
with a micrometer.
2. Acceptable inside diameter range must be within
specifications.
3. If a valve guide is out of tolerance, the cylinder head
must be replaced.
Servicing Valves/Valve Guides/Valve
Seats
If valves, valve guides, or valve seats require servicing or
replacement, Arctic Cat recommends that the compo-
nents be taken to a qualified machine shop for servicing.
CAUTION
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
the rocker arm.
2. Acceptable inside diameter range must be within
specifications.
Measuring Rocker Arm Shaft
(Outside Diameter)
1. Using a micrometer, measure the outside diameter of
the rocker arm shaft.
2. Acceptable outside diameter range must be within
specifications.
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.
CC131D
2. Insert each valve into its original valve location.
3. Install the valve springs with the painted end of the
spring facing away from the cylinder head.
 NOTE: If the paint is not visible, install the ends of
the springs with the closest wound coils toward the
head.
4. Place a spring retainer over the valve springs; then
using the valve spring compressor, compress the
valve springs and install the valve keepers.
CC144D
ATV-1011A
43