Polaris FS IQ TOURING 7427 C - Manual (Page 130)

127
MAINTENANCE
Cooling System
Bleeding the Cooling System
9. While observing the bleed return and making sure the coolant level
is visible in the filler neck, observe the engine temperature in the
digital display. The temperature should rise steadily, indicating that
the system is bleeding properly.
10. If the temperature does not rise after approximately one (1) minute,
repeat steps 8 and 9. Make sure steps 8 and 9 are followed precisely
during the entire bleed procedure.
11. Reinstall the coolant pressure cap when engine temperature reaches
120 ° (48° C). Do not stop the engine at this step.
NOTE: If the engine is stopped before the cap is installed, a large amount of
coolant will flow out of the filler neck and the entire bleed procedure
will have to be performed again.
12. While the engine temperature is rising, allow the engine to idle until
the temperature reaches approximately 220 ° F (104° C). Do not stop
the engine at this step.
13. Feel the coolers at the rear of the snowmobile (rear cooler, de-icers,
grippers, as equipped). These components should be warm to the
touch, indicating the thermostat is open and the entire cooling sys-
tem is bleeding. If coolant is still flowing from the bleed return and
there is coolant in the filler neck, the system has been bled properly.
14. Stop the engine. Allow it to cool completely.
15. Restart the engine and allow it to idle until the temperature reaches
120 ° F (49° C). Stop the engine.
16. Keeping your face and other exposed skin clear of the bleed screw
on the PTO side of the head, loosen the screw about 1/4 turn. You
should hear hot air escape. Tighten the screw immediately when
coolant begins to escape. Torque the screw to 9 ft. lbs. (12 Nm).
17. Remove the coolant overflow tank cap. Add coolant to the “COLD
FILL” mark on the tank. Reinstall the cap.