Polaris Ranger RZR SW, Service Manual, Page: 62 / 346

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.
1. Drive the vehicle onto a slight incline and use properly
weight rated ramps. If an incline is not available, slightly
elevate the front of the vehicle.
2. Place the vehicle in Park and block the rear wheels.
3. Remove pressure cap and top off coolant.
4. Remove recovery bottle cap and fill bottle to the full line.
5. Leave the cap off of the radiator to allow any possible air
to escape.
6. Start the engine and let it idle for 5-10 minutes or until the
thermostat opens and allows coolant to flow through the
system.
7. Slightly loosen the bleed screw (C) on the cylinder head 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.
8. Tighten the bleed screw to 70 ± 10 in. lbs. (8 ± 1.13 Nm)
on the thermostat housing and properly install the pressure
cap.
9. Squeeze the coolant lines by hand to help purge the system
of air.
NOTE: If there is air in the system you will see air
bubbles forming through the radiator filler neck.
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.
Pressure Cap
Recovery Bottle
Pressure Cap
Top LH Side
of Cylinder Head
C
Spark Plug