Polaris FST Touring - Manual (Page 112)

109
MAINTENANCE
Cooling System
Bleeding the Cooling System
8. With the engine idling, and while making sure that the level in the
filler neck remains visible, observe the bleed return. If the system
is self-bleeding properly, coolant will be pumped out of this hole.
NOTE: Coolant flow may be erratic (spitting, misting) for the first few
minutes of bleeding, but as long as the procedure is followed
and coolant is visible in the filler neck, the system should
bleed properly.
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. 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.
12. 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
system 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. Do not stop the engine at this step.
13. Reinstall the coolant pressure cap while the engine is idling.
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.
14. Stop the engine.
15. Remove the coolant overflow tank cap. Add coolant to the
“COLD FILL” mark on the tank. Reinstall the cap.