Combustion Chamber Cleaning - Polaris RZR 900 2017 Service Manual

ENGINE / COOLING SYSTEM
5. Measure diameter of valve stem with a micrometer in
three places, then rotate 90° and measure again
(take six measurements
specifications.
MEASUREMENT
Valve Stem Diameter:
.2155 - .2161" (5.475 - 5.490 mm)
Exhaust:
.2147 - .2153" (5.455 - 5.470 mm)
6. 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)
7. Be sure to measure each guide and valve
combination individually.
NOTICE
The valve guides cannot be replaced.
3.98
total). Compare
Intake:

COMBUSTION CHAMBER CLEANING

to
Wear eye protection during combustion chamber
1. Clean all
combustion chambers and valve seat area
Carbon Clean Fuel Treatment (2871326) can be used
to help remove carbon deposits.
Do not use a metal scraper, a coarse wire brush or
abrasive cleaners to clean the cylinder head. Damage
2. Visually inspect cylinder head gasket surface and
combustion chamber for cracks or damage. Pay
close attention to areas around spark plug and valve
seats.
9930588 R02 - 2017-2020 RZR 900 900/S 900/S4 1000/S 1000/S4 Service Manual
WARNING
cleaning.
accumulated carbon deposits
NOTICE
may result.
© Copyright Polaris Industries Inc.
from
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