Page 139 - Manual Oficina Polaris RZR 570 13-18

ENGINE / COOLING SYSTEM

CAMSHAFT INSPECTION EXHAUST CAMSHAFT DECOMPRESSION
Inspect all main journals and cam lobes as described MECHANISM
below and compare to specifications. Replace camshafts
or cylinder head if worn beyond service limit or if any NOTE
surface is pitted or damaged.
Removal of the decompression mechanism is not
1. Visually inspect each cam lobe for wear or damage. necessary unless replacement is required.
2. Measure the height of each cam lobe from the base
circle to highest point on the lobe using a 1. Thoroughly clean and inspect the decompression
micrometer. Compare to specification. mechanism q located on the exhaust camshaft.
2. Replace the decompression assembly if any 3
excessive wear or binding is evident.

NOTE
Replace camshafts if damaged or if any part is worn 3. Be sure the decompression mechanism functions
past the service limit. smoothly and easily returns under spring pressure to
the resting position against gravity.

MEASUREMENT CAM CHAIN AND GUIDE SERVICE
Camshaft Lobe Height:
Intake: 1.5704" ± 0.0038" (39.89 ± 0.097 mm) NOTE
Exhaust: 1.5405" ± 0.0038" (39.13 ± 0.097 mm) 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.

9926813 R06 - 2013-2016 RZR 570 Service Manual 3.41
© Copyright Polaris Industries Inc.