Page 242 - Manual_Polaris_RZR_ProXP-20-21

ENGINE / COOLING SYSTEM

VALVE CLEARANCE ADJUSTMENT 5. If any of the valve clearance measurements are out of
specification, remove the camshaft carriers and
CAUTION camshafts and proceed with this procedure.
Do not rotate the engine backwards. The timing chain NOTICE
may jump teeth and lead to poor performance and/or
severe engine damage. If all valve clearance measurements are within
specification, remove the camshaft carriers and
proceed to Camshaft Installation / Timing.
NOTICE
Always inspect valve clearance prior to final engine 6. Remove the valve tappet from a valve that was out of
assembly.
specification.

IMPORTANT
The engine has a 270° offset crank. There will always
be at least one valve open at any position of the crank.
Turn the camshaft until two valves are not loaded.

1. Remove the valve cover (if it is not already off).

2. Rotate the camshaft until the cam lobes above the
valves you are inspecting are facing up y.

NOTICE
Keep mated parts together and in order with respect to
their location in the cylinder head for assembly
purposes. Mark each component or place them in an
organized rack as you remove them.

7. Record the 3 digit number i on the bottom of the
tappet.

3. Measure the valve clearance u using a thickness
(feeler) gauge. Record the measurement if clearance
is out of specification.
MEASUREMENT
Intake Valve Clearance (cold):
.006 ± .002" (0.15 ± 0.05 mm)

Exhaust Valve Clearance (cold):
.010 ± .002" (0.25 ± 0.05 mm)

4. Repeat steps 6 and 7 until all eight valves have been
inspected.
8. Reference the valve clearance measurement
recorded for that valve, along with the 3-digit tappet
number.
9. Refer to Valve Lash - Tappet Selection page 3.100
and select the proper tappet.

3.98 9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.