3.36
ENGINE / COOLING SYSTEM
9923523 - 2012
RANGER
RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
SETTING TDC (TOP-DEAD-CENTER)
There ar e thre e ways to en sure the pisto n is at TDC.
Remove the outer clutch cover to access the drive clutch
to aid in engine rotation (manually turn the drive clutch
counter clockwise).
1. With the CPS sensor removed, rotate the engine until
the “V” mar ked o n the flywhee l is a ligned with the
CPS mounting ho le.
This will se t TDC, but not
necessarily TDC o f t he compression st roke.
View the timing marks on the camshaft sprockets to
ensure the e ngine is at TDC o f the co mpression
stroke.
2. With t he v alve cover a nd thermostat h ousing
removed, ro tate th e en gine so the cam lobe s a re
facing ou tward a nd th e Cylin der Hold ing a nd
Camshaft Timing Plate (PU-50563) can be installed
into the slots of the camshafts as shown below. This
will set TDC of the compression stroke.
IMPORTANT: Intake c am spr ocket shou ld h ave “I”
marks aligned with gasket surface and the exhaust
cam s procket sh ould ha ve “E” mark s a ligned wit h
gasket surface.
3. With the stator cover and flywheel removed, rotate the
engine and position the piston at TDC by aligning the
timing ho le in cra nk case with a timing hole in th e
crankshaft.
Insert a 1 /4” dr ive socket exte nsion through th e
crankcase and into the crankshaft locating hole.
This
will s et TDC, but n ot necessarily TDC of the
compression stroke.
View the timing marks on the
cam shaft sprockets to ensure the engine is at TDC
of the compression stroke.
PU-50563
I
I
E
E
Image for Reference Only
1/4” Drive Extension
Alignment Hole
Summary of Contents for 2012 RANGER RZR 570
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