Engine Breather Hose; Engine Cylinder Leakdown Test; Spark Arrestor - Polaris RZR PRO R Service Manual

MAINTENANCE

ENGINE BREATHER HOSE

The engine valve cover is equipped with a breather hose
that vents to the engine air intake. Inspect the breather
hose for possible kinks or wear. The hose is form fitted
for proper fit.
IMPORTANT
Make sure the vent hose is not kinked, restricted or cut.

ENGINE CYLINDER LEAKDOWN TEST

A cylinder leak-down test is the best indication of engine
condition. Follow tester manufacturer's instructions to
perform a cylinder leak-down test. Never use high
pressure leakage testers as crankshaft seals may
dislodge and leak.
Cylinder Leakage Service Limit: 15%
If leakage exceeds service limit, inspect the engine for
the cause.
NOTICE
A brand new or rebuilt engine will have higher leakdown
than an engine with 5 hours of runtime. Leakdown
should decrease once the rings are broken in.
2.14

SPARK ARRESTOR

The spark arrestor should be cleaned after every oil
change to remove accumulated carbon. A plugged spark
arrestor will affect engine performance. Replace a
cracked or damaged spark arrestor before running the
vehicle.
NOTICE
The spark arrestor should be cleaned each time the
machine is submerged in water/mud, and after every oil
change.
1. Remove two fasteners
bumper.
2. Remove the spark arrestor retaining fastener
9940259 R02 - 2022 RZR PRO R / PRO R 4 Service Manual
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and remove the rear
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.
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