3.96
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
CAM CHAIN AND GUIDE SERVICE
NOTICE
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 fasteners
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.
5. Upon installation, torque all fasteners to specification
and reassemble engine and vehicle as outlined in
this chapter.
TORQUE
Lower Cam Chain Guide Fasteners:
9 ft-lbs (12 Nm)
Upper Cam Chain Guide Fasteners:
7 ft-lbs (10 Nm)
CYLINDER HEAD REMOVAL
NOTICE
The cylinder head can be serviced with the engine
installed in the chassis.
Do not rotate head assembly up side-down until the
valve tappets have been removed.
1. Remove and discard the two outer M6 bolts
q
that
retain the cylinder head
w
and the cylinder.
2. Loosen the four cylinder head bolts
e
evenly 1/8
turn (60 degrees) at a time until all are loose.
3. Remove and discard the cylinder head bolts
e
.
Replace with new upon assembly.
4. Tap cylinder head lightly with a soft faced hammer
until loose. Tap only in reinforced areas or on thick
parts of the cylinder head casting.
5. Remove the cylinder head
w
and head gasket
r
.
ENGINE / COOLING SYSTEM
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