Polaris Ranger 500 2x4 2007, Service Manual

Page: 65 / 345

3.6
ENGINE
Engine Fastener Torque Patterns
Tighten cylinder head, cylinder base, and crankcase fasteners in
3 steps following the sequence outlined below.
GENERAL ENGINE SERVICE
Piston Identification
The piston may have an identification mark or the piston
may not have an identification mark for piston placement.
If the piston has an identification mark, follow the directions
for piston placement below. If the piston does not have an
identification mark, the direction for placement of the piston
does not matter.
Note the directional and identification marks when viewing the
pistons from the top. The letter “F”, “
g
”, “
4
” or “ : ” must always
be toward the flywheel side of the engine. The other numbers are
used for identification as to diameter, length and design. Four
stroke engine rings have a rectangular profile. See text for oil
control ring upper rail installation. Use the information below to
identify pistons and rings.
*Pistons and rings marked 25 equal .25mm (.010”) oversized
*Pistons and rings marked 50 equal .50mm (.020”) oversized
2
4
5
6
1
6 mm
Cylinder Head
1
2
5
7
8
9
Crankcase
3
Cylinder Base
Pattern
6
10
Pattern
3
4
Engine
Model No.
Oversize
Available*
(mm)
Piston
Length
Standard
Piston
Identification
EH50PLE
.25
.50
72 mm C