Page 203 - Manual_Polaris_RZR_ProXP-20-21

ENGINE / COOLING SYSTEM

VALVE INSPECTION 5. Inspect split keeper groove for wear or flaring in the
keeper seat area.
CAUTION
NOTICE
The EXHAUST valves are sodium filled and should be
handled with care. Use proper protection when The valves can be re-faced or end ground, if necessary.
handling a broken exhaust valve. They must be replaced if extensively worn, burnt, bent
or damaged.

NOTICE
6. Measure diameter of valve stem with a micrometer in
Valves with 100 hours or more will have noticeable three places, then rotate 90° and measure again
markings on the valve face. This is normal and should (take six measurements total). Compare to 3
not cause valve leakage. Both valves shown are specifications.
acceptable and would not require replacement.

MEASUREMENT
1. Remove all carbon from valves with a soft wire wheel Valve Stem Diameter:
or brush.
Intake: .2155 - .2161" (5.475 - 5.490 mm)
2. Check valve face for pitting or burnt spots. Exhaust: .2147 - .2153" (5.455 - 5.470 mm)
3. Inspect the valve stem q in various spots for wear or
pitting. To check for bent valve stems, mount valve in 7. Measure valve guide inside diameter at the top,
a drill or use “V” blocks and a dial indicator.
middle and end of the guide using a small hole gauge
and a micrometer. Measure in two directions.

4. Check the end of the valve stem w for flaring, pitting,
wear or damage.
MEASUREMENT
Valve Guide I.D.:
.2165 - .2171" (5.500 - 5.515 mm)

9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual 3.59
© Copyright Polaris Industries Inc.