Polaris RZR PRO XP 2020, Service Manual

Page: 203 / 598

3
9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.
3.59
VALVE INSPECTION
CAUTION
The EXHAUST valves are sodium filled and should be
handled with care. Use proper protection when
handling a broken exhaust valve.
NOTICE
Valves with 100 hours or more will have noticeable
markings on the valve face. This is normal and should
not cause valve leakage. Both valves shown are
acceptable and would not require replacement.
1. Remove all carbon from valves with a soft wire wheel
or brush.
2. Check valve face for pitting or burnt spots.
3. Inspect the valve stem
q
in various spots for wear or
pitting. To check for bent valve stems, mount valve in
a drill or use “V” blocks and a dial indicator.
4. Check the end of the valve stem
w
for flaring, pitting,
wear or damage.
5. Inspect split keeper groove for wear or flaring in the
keeper seat area.
NOTICE
The valves can be re-faced or end ground, if necessary.
They must be replaced if extensively worn, burnt, bent
or damaged.
6. Measure diameter of valve stem with a micrometer in
three places, then rotate 90° and measure again
(take six measurements total). Compare to
specifications.
MEASUREMENT
Valve Stem Diameter:
Intake: .2155 - .2161" (5.475 - 5.490 mm)
Exhaust: .2147 - .2153" (5.455 - 5.470 mm)
7. Measure valve guide inside diameter at the top,
middle and end of the guide using a small hole gauge
and a micrometer. Measure in two directions.
MEASUREMENT
Valve Guide I.D.:
.2165 - .2171" (5.500 - 5.515 mm)
ENGINE / COOLING SYSTEM