Valve Inspection - Polaris RZR 900 2017 Service Manual

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ENGINE / COOLING SYSTEM

VALVE INSPECTION

1. Remove all carbon from valves with a soft wire wheel

2. Check valve face for runout, pitting, and burnt spots.

To check for bent valve stems, mount valve in a drill

or use "V" blocks and a dial indicator.

3. Check the end of the valve stem for flaring, pitting,

wear or damage.

4. Inspect split keeper groove for wear or flaring in the

keeper seat area.

The valves can be re-faced or end ground, if necessary.

They must be replaced if extensively worn, burnt, bent

5. Measure diameter of valve stem with a micrometer in

three places, then rotate 90° and measure again

specifications.

Intake: 0.2155" - 0.2161" (5.475 - 5.490 mm)

Exhaust: 0.2147" - 0.2153" (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.

0.2165 - 0.2171" (5.500 - 5.515 mm)

7. Be sure to measure each guide and valve

combination individually.

The valve guides cannot be replaced.

9930588 R02 - 2017-2020 RZR 900 900/S 900/S4 1000/S 1000/S4 Service Manual

measurements

Valve Stem Diameter:

Valve Guide I.D.:

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