Piston Ring To Groove Clearance; Piston Ring Installed Gap; Piston To Cylinder Clearance - Polaris RZR XP Turbo Service Manual

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3. The oil control ring
consisting of a top and bottom steel rail and a center
expander section. Remove top rail first, then bottom
rail, then the expander.

PISTON RING TO GROOVE CLEARANCE

Measure piston ring to groove clearance
the ring in the ring land and measuring with a thickness
(feeler) gauge. Replace piston and rings if ring-to-groove
clearance exceeds service limits.
MEASUREMENT
Piston Ring to Groove Clearance:
Top Ring/ Second Ring:
.0007 - .0023" (0.020 - 0.060 mm)
Service Limit:.0047" (0.12 mm)

PISTON RING INSTALLED GAP

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1. Place each piston ring
the piston to push the ring squarely into cylinder.
9928491 R04 - 2017-2018 RZR XP Turbo / XP4 Turbo Service Manual
© Copyright Polaris Industries Inc.
is a three piece design
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by placing
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inside the cylinder . Use
ENGINE / COOLING SYSTEM
2. Measure installed gap with a feeler gauge
the top and bottom of the cylinder.
NOTE
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.
3. If the installed gap measurement exceeds the service
limit, replace the rings.
MEASUREMENT
Piston Ring Installed Gap:
Top Ring: .010 - .016" (0.24 - 0.40 mm)
Service Limit: .0196" (0.50 mm)
Second Ring: .015 - .025" (0.37 - 0.63 mm)
Service Limit: .028" (0.70 mm)
Oil Control Rails: .010 - .040" (0.25 - 1.02 mm)
Service Limit: .045" (1.15 mm)
IMPORTANT
Always check piston ring installed gap when installing
new rings and/or a new cylinder.

PISTON TO CYLINDER CLEARANCE

Measure piston outside diameter at a point 13 mm up
from the bottom of the piston, at a right angle to piston
pin bore.
Subtract measurement from maximum measurement
obtained in Step 4 of "Cylinder Inspection" procedure.
MEASUREMENT
Piston O.D. (Standard):
3.6597 ± .0003" (92.959 ± 0.008 mm)
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at both
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