Cooling System Bleeding Procedure; Radiator; Radiator Cleaning - Polaris Sportsman 850 Service Manual

ENGINE / COOLING SYSTEM
RESISTANCE READING @ IDLE
APPROX.
READING
CONDITION
(OHMS)
Room
2.5kΩ± 3%
Temperature
System Capacity 2 qts. (1.9 l)
Radiator Cap
13 PSI
Relief Pressure
COOLING SYSTEM BLEEDING
PROCEDURE
1. Place the vehicle in PARK.
CAUTION
Be sure the engine has cooled and there is no pressure
built up in the cooling system before removing the
radiator cap. The coolant may be hot and could cause
severe injury or burns.
2. Remove the front rack to access the radiator
pressure cap and recovery bottle.
3. Remove the pressure cap and top off coolant. Leave
the pressure cap off at this point.
4. Remove recovery bottle fill cap and fill the bottle to
the "MAX" line. Reinstall the recovery bottle cap.
If coolant level is very LOW in the radiator, or if there
are leaks in the system, the coolant system will not
draw coolant from the recovery bottle.
5. Start the engine and allow it to idle for 5-10 minutes
until the thermostat opens and allows coolant to
travel through the entire system.
When the thermostat opens the radiator coolant level
will drop significantly.
6. Squeeze coolant lines to help purge the system of
air.
7. With engine still idling, top off the radiator with
Polaris Premium Antifreeze. If no air bubbles are
seen at the radiator filler neck, the system should be
purged of air.
8. Reinstall the radiator pressure cap.
Be sure to install the radiator pressure cap before
shutting off the engine.
Coolant may spit out of the radiator.
3.12
TEMPERA-
TURE
68°F (20°C)
NOTE
NOTE
NOTE
9. Stop the engine and allow it to cool. Top off the
radiator with coolant. If you hear or see a "glug" at
the filler neck or the coolant level drops indicating
that coolant has been pulled into the system, fill the
radiator first before filling the recovery bottle.
10. Any air remaining in the system should continue to
bleed out through the recovery bottle.
11. Repeat this procedure if you are still having difficulty
bleeding the system.

RADIATOR

RADIATOR CLEANING

1. Check radiator air passages for restrictions or
damage.
2. Flush through the radiator core from the rear.
3. Carefully straighten any bent radiator fins.
4. Remove any obstructions with compressed air or low
pressure water.
CAUTION
Washing the vehicle with a high-pressure washer could
damage the radiator fins and impair the radiators
effectiveness. Use of a high-pressure washer is not
recommended.