Cylinder Removal; Cylinder Inspection - Polaris RANGER 500 2018 Service Manual

Intake Seat Cutter Diameter:
1.979 in. (50.26 mm)
Exhaust Seat Cutter Diameter:
1.617 in. (41.08 mm)
8. Clean all filings from the area with hot soapy water.
Rinse and dry with compressed air.
9. Lubricate valve guides with clean engine oil and apply
oil or water based lapping compound to the face of
the valve.
NOTE
Lapping is not required if an interference angle
reconditioning method is used.
10. Insert the valve into its respective guide and lap using
a lapping tool or a section of fuel line connected to the
valve stem.
9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
ENGINE / COOLING SYSTEM
11. Rotate the valve rapidly back and forth until the cut
sounds smooth. Lift the valve slightly off of the seat,
rotate 1/4 turn, and repeat the lapping process. Do
this four to five times until the valve is fully seated,
and repeat process for the other valves.
12. Thoroughly clean cylinder head and valves.

CYLINDER REMOVAL

1. Remove and discard the head gasket.
2. Position the cam chain and guides vertically.
3. Tap cylinder lightly with a plastic hammer in the
reinforced areas only until loose.
4. Rock cylinder forward and backward and lift it from
the crankcase, supporting piston and connecting rod.
5. Remove the cylinder from the engine.
6. Remove and discard cylinder base gasket.
NOTE
Stuffing a clean rag around the connecting rod after
cylinder is removed is helpful in keeping foreign objects
from falling into the crankcase.

CYLINDER INSPECTION

1. Remove all gasket material from the cylinder sealing
surfaces.
3
3.73