2.10
Maintenance
Surge Tank
Keep the level of the coolant inside the surge tank at the
FULL COLD level mark (A) when the coolant is at room
temperature.
Always add coolant when the cooling syst
em is COLD.
Recommended Coolant
Use Polaris Premium 60/40 pre-mixed antifreeze. This
premium antifreeze is rated for temperatures down to
-62°F (-52°C).
Cooling System Bleeding
1. Position the snowmobile in a well-ventilated area.
2. Raise the front-right ski/suspension off the ground.
3. Allow the cooling system to cool completely. Open the
e
ngine compartment door panels. Remove the hood.
4. Verify the coolant level in the surge tank is at the
COLD
mark. Fill the surge tank with coolant if
required. Loosely install the pressure cap.
5. Open the thermostat housin
g bleed screw. Wrap a
clean shop towel around the housing to absorb any
coolant that may flow out of the bleed screw.
6. Apply the parking brake and start the engine.
7. Immediately add coolant to the su
rge tank if the
coolant level drops significantly after the engine is
started. Watch the level and add more coolant until the
level stops dropping.
NOTE: Squeeze the coolant hoses to purge air from
the
cooling system.
8. Continue to run the engine until the engine
t
emperature is at least 130° F (54° C). Secure the
bleed screw after the thermostat begins to open and
coolant begins to flow out of the bleed screw.
9. Verify the tunnel coolers and
front heat exchanger (if
equipped) begin to warm as the engine continues to
run.
10. The thermostat outlet bleed screw may need to be
ope
ned slightly to allow any residual air trapped in the
outlet to escape.
11. Verify that all of the coolers are warm, including the
tu
nnel-length cooling system. Shut off the engine
once all of the tunnel coolers are warm. Release the
parking brake.
12. Allow time for the coolant temperature to cool. Re-
ch
eck the coolant level in the surge tank. Add more
coolant if required.
13. Reinstall the surge tank cap, hood, and engine
co
mpartment door panels.
Never remove the surge tank pressure cap when the
cooling system is warm. Severe burns to skin may occur
from escaping coolant or steam.
Always verify all tunnel coolers / heat exchangers are
warm to the touch. A cooler or return hose that is
significantly “colder” than another cooler or hose is an
indication of trapped air within the cooling system.
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