Cylinder Installation - Polaris RANGER RZR 170 Service Manual

ENGINE
5. Place the dowel pins in the PTO side of the crankcase
and install a new cylinder base gasket.
6. Lubricate the piston and rings with assembly lube and
install a ring compressor on the piston assembly.
Verify that the ring gaps are 120 degrees apart
from each other before installation.

Cylinder Installation

NOTE: Clean the gasket surfaces on the crankcase
and cylinder. Remove all traces of old gasket
material and apply a new base gasket
1. Verify the cylinder base dowel pin(s) and a new base
gasket are installed. Position the Piston Support
Block (PN 2870390) (A) beneath the piston skirt to
support the piston during cylinder installation.
NOTE: Route cam chain through the cylinder chain
room and secure it, holding it up while rotating the
engine to avoid damage to the chain, drive sprocket
teeth or tensioner blade.
2. Apply clean engine oil liberally to the bore and tapered
area of the cylinder. Place the cylinder on to the studs.
3. Loop the cam chain through the cylinder chain room
and secure with mechanic's wire. Seat the cylinder
fully on the piston and support block.
3.40
4. Push the rings into the cylinder taper using a non-
5. Remove the support block once the piston rings are
6. Install the cam chain guide and dowel pins into the
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
metallic, blunt-edge tool while pushing the cylinder
down. This will help push the piston past the ring taper
into the cylinder.
inside the cylinder. Seat the cylinder firmly on the base
gasket.
cylinder. Verify the bottom end of the guide is seated
properly in the crankcase.