Engine Assembly - Top End; Cylinder Head Assembly - Polaris RZR PRO R Service Manual

ENGINE / COOLING SYSTEM

ENGINE ASSEMBLY - TOP END

CYLINDER HEAD ASSEMBLY

NOTICE
In order to avoid damage, install the spark plugs after
the cylinder head has been installed on the engine.
1. Inspect the valve springs for the following conditions:
• Expanded height
• Unparallel spring ends
• Spring tension using tester
• Any distorted springs should be replaced
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2. Install the intake and exhaust
3. use the following steps to measure valve runout:
a. Apply a dab of Prussian blue on the entire valve
face. Seat the valve but do not rotate it. The
Prussian blue traces transferred to the valve seat
are an indication of concentricity of the valve seat.
b. Clean all traces of Prussian blue.
c. Apply a dab of Prussian blue on the valve seat
and repeat the check. The traces of Prussian blue
transferred to the valve face indicates valve face
concentricity.
4. Replace any valves, if required.
3.84
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valves .
5. Install the new valve seals
the valve guides.
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6. Install the springs .
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7. Install the retainers
8. Using the PU-51126 compressor, compress the valve
spring.
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9. Install the valve keys
10. Slowly release the PU-51126 compressor from the
valve/spring assembly
9940259 R02 - 2022 RZR PRO R / PRO R 4 Service Manual
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. Fully seat the seals on
.
.
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