2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 57Get this manual
Maintenance Engine Cooling System Overview
The engine cooling system consists of the following components: Water Pump Water InletOutlet Manifolds Thermostat Front Tunnel, Left and Right-Hand Perimeter and Rear Tunnel Cooling Extrusions Front Radiator Expansion TankCoolant Fill Tube The cooling system is filled via the designated main fill tube, not the expansion tank