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

3.62
9931493 R03 - 2020-2021 Sportsman XP 1000 S Service Manual
© Copyright Polaris Inc.
PISTON RING TO GROOVE CLEARANCE
INSPECTION
1. Measure piston ring to groove clearance
q
by
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)
PISTON RING REMOVAL
1. Carefully remove top compression ring
q
by hand or
using a ring removal pliers.
IMPORTANT
Do not expand the ring more than necessary to remove
it from the piston or the ring may break or lose radial
tension.
2. Carefully expand ring and lift it off the piston.
3. Repeat procedure for second ring
w
.
4. Remove (3 piece) oil control ring
e
. Remove top rail
first, then bottom rail, then the expander.
PISTON RING INSTALLED GAP
1. Place each piston ring
q
inside the cylinder . Use the
piston to push the ring squarely into cylinder.
2. Measure installed gap with a feeler gauge
w
at both
the top and bottom of the cylinder.
NOTICE
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
out of round.
ENGINE / COOLING SYSTEM