5.3
Engine Systems
5
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
488 Engine
500EV Engine
ENGINE INSPECTIONS
Cylinder Head Inspection
Using a flat bar and a feeler gauge, inspect each cylinder
head for warping. Replace head if warping exceeds .003"
(.08mm).
Cylinder Measurement
Inspect each cylinder for wear, scratches, or damage. If no
damage is evident, measure the cylinder for taper and out
of round with a telescoping gauge or a dial bore gauge.
Measure the bore 1/2" from the top of the cylinder; in line
with the piston pin and 90° to the pin to determine if the
bore is out of round. Repeat the measurements at the
middle and bottom of the cylinder. Use the chart below and
record all measurements.
= In. / mm.
Cylinder Head Warp Limit
.003" (.08mm)
P
M
2
3
4
6
8
12
13
9
10
14
11
7
5
1
MAG
PTO
Cylinder Measurement Worksheet
TOP
X
Y
MIDDLE
X
Y
BOTTOM
X
Y
Out-of-Round = Top X - Top Y and Bottom Y - Bottom X
Taper = Top Y - Bottom Y and Top X - Bottom X
