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3.84

9940259 R02 - 2022 RZR PRO R / PRO R 4 Service Manual

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

2. Install the intake

and exhaust

valves .

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.

5. Install the new valve seals

. Fully seat the seals on

the valve guides.

6. Install the springs

7. Install the retainers

8. Using the PU-51126 compressor, compress the valve

spring.

9. Install the valve keys

10.Slowly release the PU-51126 compressor from the

valve/spring assembly

ENGINE / COOLING SYSTEM

Polaris RZR PRO R User Manual

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