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 (m anually tu rn the drive clu tch
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
r
emoved, 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”
ma
rks a ligned wit h g asket surface and t he exhaust
cam s procket sh ould ha ve “E” mark s a ligned wit h
gasket surface.
3. With the stator cover and flywh
eel 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
cr
ankcase 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.
I
I
E
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Image for Reference Only
1/4” Drive Extension
Alignment Hole