3
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
3.127
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.
5. Upon installation, torque all fasteners to specification
and reassemble engine and vehicle as outlined in
this chapter.
TORQUE
Upper Cam Chain Guide Fasteners:
7 ft-lb (10 Nm)
CYLINDER HEAD REMOVAL
NOTE
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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