Piston Ring To Groove Clearance Inspection; Piston Ring Removal; Piston Ring Installed Gap - Polaris Sportsman XP 1000 S 2020 Service Manual

ENGINE / COOLING SYSTEM
PISTON RING TO GROOVE CLEARANCE
INSPECTION
1. Measure piston ring to groove clearance
placing the ring in the ring land and measuring with a
thickness (feeler) gauge. Replace piston and rings if
ring-to-groove exceeds service limit.
2. Repeat procedure for second ring.
MEASUREMENT
Piston Ring to Groove Clearance:
Top / Second Ring:
.0007 - .0023" (0.020 - 0.060 mm)
Service Limit:
.0047" (0.12 mm)
3.62

PISTON RING REMOVAL

1. Carefully remove top compression ring
using a ring removal pliers.
q
by
Do not expand the ring more than necessary to remove
it from the piston or the ring may break or lose radial
2. Carefully expand ring and lift it off the piston.
3. Repeat procedure for second ring
4. Remove (3 piece) oil control ring
first, then bottom rail, then the expander.

PISTON RING INSTALLED GAP

1. Place each piston ring
piston to push the ring squarely into cylinder.
2. Measure installed gap with a feeler gauge
the top and bottom of the cylinder.
A difference between top and bottom end gap
measurements is a general indication of cylinder taper
(wear). The cylinder should be measured for taper and
9931493 R03 - 2020-2021 Sportsman XP 1000 S Service Manual
q
by hand or
IMPORTANT
tension.
w
.
e
. Remove top rail
q
inside the cylinder . Use the
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NOTICE
out of round.
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