3.26
ENGINE
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
3.
Measure piston pin bore. Replace piston if out-of-
round
4.
Measure piston pin O.D. Replace piston pin if out-of-
round.
5.
Measure connecting rod small end ID. Replace
crankshaft if out-of-round.
6.
Measure piston ring to groove clearance by placing
the ring in the ring land and measuring with a
thickness gauge. Replace piston and rings if ring-to-
groove clearance exceeds service limits.
Piston Ring Installed Gap
1.
Place each piston ring inside cylinder using piston to
push ring squarely into place as shown.
2.
Measure the gap with a feeler gauge at both the top
and bottom of the cylinder.
NOTE: Measure at two points in the cylinder A
difference in end gap indicates cylinder taper. The
cylinder should be measured for excessive taper
and out of round.
Piston Pin Bore
Piston Pin Measurement Locations
= In. / mm.
Piston Ring Installed Gap:
Top Ring
Std: .0059- .013” (.15-.35 mm)
Limit: .0196” (0.5 mm)
Second Ring
Std: .0059- .013” (.15-.35 mm)
Limit: .196” (0.5 mm)
Oil Ring
Std: .0079-.0314” (0.2- 0.8 mm)
Limit: .059” (1.5 mm)
Feeler Gauge
Ring
Piston
Piston Ring
Cylinder
Feeler Gauge
25-50 mm
Piston ring end gap installed
