3
9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
3.179
CAMSHAFT INSTALLATION / TIMING
NOTE
If any valve train components were replaced, refer to
“Valve Clearance Adjustment”, page 3.174
procedure prior to “Camshaft Installation / Timing”.
1. Rotate the engine and position the piston at TDC.
2. Reference the intake
q
and exhaust
w
markings
made during disassembly.
3. Lubricate all camshaft lobes and bearing journal
surfaces with Polaris PS-4 engine oil prior to
installation.
4. Place the exhaust cam into the cylinder head and
align the timing marks as shown below.
5. Wrap the cam chain around the exhaust cam
sprocket and hold the exhaust cam in its current
position.
6. Carefully install the intake cam at an angle to allow
for cam chain installation. Roll the cam shaft into its
bearing pockets and verify that the timing marks are
in alignment as shown below.
NOTE
Intake cam sprocket should have “I” marks aligned with
gasket surface and the exhaust cam sprocket should
have “E” marks aligned with gasket surface.
7. Carefully install the camshaft carrier onto the
camshafts.
ENGINE / COOLING SYSTEM
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