Polaris 2008 Ranger RZR, Service Manual

Page: 54 / 312

3.14
ENGINE
Cooling System Bleeding Procedure
NOTE: If the coolant level is LOW in the radiator, or
if there are leaks in the system, the coolant system
will not draw coolant from the reservoir tank.
NOTE: Use this procedure when a unit overheats
and no apparent leaks in the cooling system are
found.
PROCEDURE 1:
1. Park machine on a level surface. Place the vehicle in
neutral and set the parking brake.
2. Remove pressure cap and top off coolant.
3. Remove recovery bottle cap and fill bottle to the full line.
4. Leave the cap off of the radiator to allow any possible air
to escape.
5. Start the engine and let it idle for 5-10 minutes or until the
thermostat opens and allows coolant to flow through the
system.
6. Slightly loosen the bleed screw (C) on the thermostat cover
to let air escape. If no air is present, a steady stream of
coolant will stream out. If air is present, the screw will
bubble and sputter as the air escapes.
7. Squeeze the coolant lines by hand to help purge the system
of air.
8. Add Polaris Premium Antifreeze to the radiator if the level
goes down.
9. Tighten the bleed screw to 70 ± 10 in.lbs. (8 ± 1.13 Nm) on
the thermostat housing and properly install the pressure
cap.
10. Stop the engine and let cool, top off the radiator filler neck
with coolant. If you hear or see a “glug” at the filler neck,
or there is a dropping of the coolant level, indicating that
coolant has been pulled into the system; Fill the recovery
bottle only after you have completely filled the cooling
system at the radiator filler neck.
11. Repeat this procedure, if overheating still occurs.
If overheating occurs after repeating this procedure,
proceed to Procedure 2.
WARNING
Always wear safety glasses and proper shop
clothing when performing the procedures in this
manual. Failing to do so may lead to possible
injury or death.
CAUTION
Use caution when performing these procedures.
Coolant may be hot and may cause
severe injury or burns.
CAUTION
Be sure the engine has cooled and no pressure
is built up in the cooling system before removing
the pressure cap. The coolant may be hot and
could cause severe injury or burns.
Recovery Bottle
Pressure Cap
WARNING
Be sure to install the pressure cap before
shutting off the engine.
Coolant may spit out of the radiator.
Top LH Side
of Engine
C