3.14
ENGINE
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
TOP-END DISASSEMBLY
Engine Removal/Installation
Refer to page 3.12 for engine removal / installation notes.
Finding Top Dead Center (TDC)
1. Remove the cooling shroud.
2. Remove the inspection cap from the stator housing.
3. Remove the valve cover and emissions pipe
assembly.
To position the crankshaft at Top Dead Center (TDC) on
the compression stroke:
4. Rotate the engine slowly in the direction of rotation
while watching the intake valve open and start to
close.
5. Continue to rotate slowly while watching the camshaft
sprocket marks and timing mark in the inspection
hole.
6. The engine is at Top Dead Center when the single
(TDC) mark on flywheel is visible within the inspection
hole and the cam sprocket hole is facing upward.
NOTE: The sprocket marks should align with the
gasket surface, the cam lobes must be pointed
downward and the rockers must have valve
clearance at this point.
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Cam Chain Tensioner Inspection
1. Remove the two cam chain tensioner flange bolts.
NOTE: The plunger is under spring tension.
Maintain inward pressure on the tensioner body
while removing.
2. Allow the cam chain tensioner plunger to extend
outward to the end of its travel. Inspect tensioner and
plunger (A) for wear or damage.
Single TDC Mark Aligned
TDC Mark
Rotation
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