Content Source: 2021 600R Owner’s Manual (9931266 Rev 01) > Maintenance Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Cooling System

Coolant

POLARIS recommends the use of POLARIS Antifreeze 50/50 Premix. This antifreeze is already premixed and ready to use. Do not dilute with water. If the vehicle will be stored or operated at extremely low temperatures, greater protection may be required. An authorized dealer can assist.
To ensure that the coolant maintains its ability to protect the engine, we recommend that the system be completely drained every five (5) years and fresh Antifreeze 50/50 Premix.
Any time the cooling system has been drained for maintenance or repair, replace the coolant with fresh Antifreeze 50/50 Premix.
NOTICE
If coolant flow becomes restricted or plugged, coolant loss, air lock, or engine damage may result. Most cooling systems are equipped with a filter that should be periodically inspected or replaced.

Coolant Level

The engine coolant level is controlled by the recovery system. The recovery system components are:
  • Engine filler neck
  • Pressure cap
  • Connecting hoses
Always maintain the coolant level at the top of the filler neck when the engine is cold.
  1. Stop the engine.
  2. Open the right side panel.
  3. View the coolant level in the coolant bottle. Add coolant as needed.
NOTICE
Operating the snowmobile with insufficient coolant will result in overheating and serious engine damage. Always maintain the coolant level as recommended.

Flushing the Cooling System

To ensure that the coolant maintains its ability to protect the engine, we recommend that the system be completely drained every five (5) years and fresh Antifreeze 50/50 Premix added. This service must be performed when the engine is cold. Your POLARIS dealer can check the coolant when performing the fall tune-up on your snowmobile.

Bleeding the Cooling System

caution
Steam and hot liquids will cause burns to your skin. Never bleed the cooling system or remove the pressure cap when the engine is warm or hot.
Use of a non-standard pressure cap will not allow the recovery system to function properly. If the pressure cap needs replacement, contact your dealer for the correct part.
NOTICE
If coolant flow becomes restricted or plugged, coolant loss, air lock, or engine damage may result. Most cooling systems are equipped with a filter that should be periodically inspected or replaced.
If coolant becomes low in the tank, bleed the system of trapped air. Perform the bleeding procedure when the engine is cold.
  1. Allow the system to cool completely, then loosen the bleed screw and fill the reservoir to the FULL COLD mark. Tighten the screw.
  2. Apply the parking brake and run the engine at idle RPM until the thermostat opens (5 to 8 minutes) and stays open.
    TIP
    As the thermostat draws in cold coolant from the heat exchangers, the cold coolant may close the thermostat. Make sure it opens and stays open.
  3. Tip the snowmobile slightly onto its right side. Cycle the RPM from idle to enough RPM (4000) to get coolant to flow, but not enough to engage the clutch.
  4. Tilt the machine slightly onto its left side so that the coolant bottle is the highest point in the cooling system. Cycle the RPM as outlined in step 3.
    TIP
    There must be enough coolant flow to purge the air from the front close-off cooler so you can observe this air reaching the bottle.
  5. Return the snowmobile to its upright position and loosen the bleed screw at the top of the water outlet manifold. When all trapped air has been purged, tighten the screw.
  6. Turn off the engine and release the parking brake. Allow the system to cool completely.
    TIP
    After cool-down, three or more ounces (88 ml) of coolant may have to be added.
  7. Remove the pressure cap and check the coolant level. Add coolant to fill line if necessary.

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