9926813 R04 - 2013-2016
RZR
570 Service Manual
© Copyright Polaris Industries Inc.
3.41
CAMSHAFT INSPECTION
Inspect all main journals and cam lobes as described
below and compare to specifications. Replace camshafts
or cylinder head if worn beyond service limit or if any
surface is pitted or damaged.
1.
Visually inspect each cam lobe for wear or damage.
2.
Measure the height of each cam lobe from the base
circle to highest point on the lobe using a
micrometer. Compare to specification.
NOTE
Replace camshafts if damaged or if any part is worn
past the service limit.
MEASUREMENT
Camshaft Lobe Height:
Intake: 1.5704" ± 0.0038" (39.89 ± 0.097 mm)
Exhaust: 1.5405" ± 0.0038" (39.13 ± 0.097 mm)
EXHAUST CAMSHAFT DECOMPRESSION
MECHANISM
NOTE
Removal of the decompression mechanism is not
necessary unless replacement is required.
1.
Thoroughly clean and inspect the decompression
mechanism
q
located on the exhaust camshaft.
2.
Replace
the
decompression
assembly
if
any
excessive wear or binding is evident.
3.
Be sure the decompression mechanism functions
smoothly and easily returns under spring pressure to
the resting position against gravity.
CAM CHAIN AND GUIDE SERVICE
NOTE
The crankcase has a removable lower cam chain drive
guide that prevents the chain from disengaging the
crankshaft during engine service.
The cam chain, cam chain guides and cam chain
tensioner can be replaced with the engine installed in
the vehicle.
1.
If not already performed, remove the valve cover,
stator cover, flywheel, cam chain tensioner, cam
carrier and camshafts as outlined in this chapter.
2.
Remove the two fasteners
q
that secure the cam
chain guides
w
to the crankcase.
3.
Remove the fastener
e
that secure the lower cam
chain guide
r
to the crankcase.
4.
Inspect the cam chain guides and replace if
excessive wear is evident.
