3.24
ENGINE
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
Piston Removal
1. Remove circlip from either side of piston.
2. Push piston pin out of piston. If necessary, heat the
crown of the piston slightly with a propane torch.
CAUTION: Do not apply heat to the piston rings. The
rings may lose radial tension.
3. Remove the compression rings, starting with the top
ring.
* Using a piston ring pliers: Carefully expand ring and lift
it off the piston. CAUTION: Do not expand the ring more
than the amount necessary to remove it from the piston, or
the ring may break.
* By hand: Placing both thumbs as shown, spread the ring
open and push up on the opposite side. Use care to not
scratch the ring lands.
4. Repeat procedure for second ring.
5. The oil control ring is a three piece design consisting
of a top and bottom steel rail and a center expander
section. Remove the top rail first followed by the
bottom rail and expander.
Cylinder Inspection
1. Remove all gasket material from the cylinder sealing
surfaces.
2. Inspect the top of the cylinder for warpage using a
straight edge and feeler gauge.
3. Inspect cylinder for wear, scratches, or damage.
4. Inspect cylinder for taper and out of round with a
telescoping gauge or a dial bore gauge. Measure in
two different directions, front to back and side to side,
on three different levels (1/2” down from top, in the
middle, and
1/2” up from the bottom).
Cylinder Warp:
.002” (.05 mm) MAX
1/2” Down From Top of Cylinder
1/2” Up From Bottom
X
X
X
Y
Y
Y
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