Polaris 340 LX 2007, Service Manual

Page: 111 / 327

5.7
ENGINE
5
Cylinder Head / Head Components
Cylinder Head Disassembly
1. Remove enough engine coolant so that no coolant remains
in the cylinder head.
2. Remove the airbox, electrical, and ignition components
from the cylinder head.
3. Remove the cooling hoses from the thermostat and throttle
body circuit fittings.
4. Evenly loosen the cylinder head screws. Always clean the
screw threads as they are removed.
NOTE: The thermostat cover screws only require
removal when access to the thermostat is desired.
5. Lift the head cover and cylinder head assembly up and off
of the cylinders.
6. Discard original o-rings. Never re-use o-rings.
7. If engine coolant spilled into the cylinder(s), wipe each
cylinder dry with a clean shop rag or paper towel. If unsure
how much coolant spilled into cylinders and crankcase,
locate the two crankcase drain screws located on the front,
lower crankcase halve. 600/700 CFI drains are located on
the bottom of the crankcase and the engine would have to
be removed.
8. Remove each screw to allow the coolant to drain out of the
engine.
Cylinder Head Assembly
1. Cylinder head assembly is the reverse of disassembly with
the addition of these notes:
• Always use new o-rings.
• Inspect the cylinder bores, combustion chamber domes,
piston faces and head cooling passages for damage or
foreign material. Resolve any issues prior to re-
assembly.
• Follow the cylinder head torque specifications and
torque sequence illustrations found at beginning of
chapter.
Recoil/Stator Removal
1. Remove the recoil cover bolts (1).
2. Remove the recoil assembly (2).
Temperature Sensor
O Rings
Knock Sensor
O Rings
Head Cover
O Ring
Thermostat
Spark Plugs
Bleed Screw
1
2
3
4
5
6
7
8
9
10
90 ft-lb
(16 N-m)
(122 N-m)
12 ft-lb
48 in-lb
(5 N-m)
(12 N-m)
9 ft-lb
(12 N-m)
9 ft-lb