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9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
3.65
CAMSHAFT INSTALLATION / TIMING
NOTICE
If any valve train components were replaced, refer to
“Valve Clearance Adjustment” page 3.112 prior to
“Camshaft Installation / Timing”.
1. Rotate the engine so the piston is at Top Dead Center
(TDC).
NOTICE
To verify TDC, see “Setting TDC (Top-Dead-Center)”.
2. Lubricate all camshaft lobes and bearing journal
surfaces with Polaris PS-4 Synthetic Engine Oil prior
to installation.
3. Place the camshaft into the cylinder head and align
the timing marks as shown below.
4. Wrap the cam chain around the camshaft in its
current position.
5. Verify that the timing marks
q
are in alignment as
shown below.
6. Carefully install the camshaft carrier onto the
camshafts.
7. Install the four bolts that retain the camshaft carrier.
Tighten the bolts evenly until snug. Do not torque at
this time.
8. Verify cam timing is correct and the piston is a TDC.
9. If timing marks are not aligned:
• Remove the cam carrier bolt and cam carrier.
• Correct the camshaft timing as needed.
• Reinstall the cam carrier.
• Re-check cam timing.
10.If needed, install the camshaft carrier and bolts.
ENGINE / COOLING SYSTEM
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