3
9930588 R02 - 2017-2020 RZR 900 900/S 900/S4 1000/S 1000/S4 Service Manual
© Copyright Polaris Industries Inc.
3.85
VALVE CLEARANCE ADJUSTMENT
IMPORTANT
Do not rotate the engine backwards. The timing chain
may jump teeth and lead to poor performance.
NOTICE
Always inspect valve clearance prior to camshaft
installation or final engine assembly.
1. Reference the camshaft intake and exhaust
markings made during disassembly. If installing new
camshafts or if camshafts were not marked, you can
reference the part number stamped on the end of the
shafts.
Intake Camshaft
q
- PN 1204583
Exhaust Camshaft
w
- PN 1204584
2. Lubricate the camshaft bearing journal surfaces with
Polaris PS-4 engine oil prior to installation.
3. Carefully install the camshafts into the cylinder head.
The PTO camshaft lobes
e
should face out as
shown.
4. Carefully install the rear camshaft carriers onto the
camshafts. Carrier openings should face each other
when installed properly.
5. Install the four bolts that retain each rear camshaft
carrier
r
&
t
and tighten the bolts evenly to
specification.
TORQUE
Camshaft Carrier Bolts:
89 in-lbs (10 Nm)
6. Rotate the camshaft until the cam lobes above the
valves you are inspecting are facing up
y
.
7. Measure the valve clearance
u
using a thickness
(feeler) gauge. Record the measurement if clearance
is out of specification.
MEASUREMENT
Intake Valve Clearance (cold):
0.006 ± .002″ (0.15 ± 0.05 mm)
Exhaust Valve Clearance (cold):
0.008 ± .002″ (0.20 ± 0.05 mm)
8. Repeat steps 6 and 7 until all eight valves have been
inspected.
ENGINE / COOLING SYSTEM
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