3.24
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
COOLING SYSTEM BLEEDING
PROCEDURE
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.
NOTICE
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. It may be necessary to
safely raise the front of the vehicle 12” (30 cm) to bleed
the cooling system.
1. Allow engine and cooling system to completely cool.
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.
2. Open the hood.
3. Remove the recovery bottle cap (Item 1) and fill the
bottle to the MAX line.
4. Remove the pressure cap (Item 2) and add the
necessary amount of Polaris Premium Antifreeze to
the radiator filler neck.
5. Remove the cargo box access cover to gain access
to the coolant bleed screw that is on top of the
thermostat housing.
6. Open the bleed screw (Item 3) to allow any trapped
air to escape.
7. Fill the radiator until a steady stream of coolant
begins to drain out of the bleed screw.
8. Tighten the bleed screw to specification, top off
coolant and properly install the pressure cap.
TORQUE
Coolant Bleed Screw:
72 in-lbs (8 Nm)
9. Start the engine and allow it to idle until the coolant
fan has cycled.
10. Allow engine and cooling system to completely cool
down (see CAUTION).
11. Remove the pressure cap. Add the necessary
amount of Polaris Premium Antifreeze to the radiator
filler neck.
12. Open the bleed screw to allow any trapped air to
escape. Close the bleed screw once a steady stream
of coolant begins to drain out.
13. Tighten the bleed screw to specification, top off
coolant and properly install the pressure cap.
TORQUE
Coolant Bleed Screw:
72 in-lbs (8 Nm)
14. Fill the recovery bottle to the MAX line.
15. Reinstall the hood.
16. Reinstall cargo box access cover.
ENGINE / COOLING SYSTEM
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