Snowmobile with improved cooling system

A snowmobile having a liquid-cooled engine, the snowmobile comprising:

• a longitudinally extending drive tunnel having an endless drive track disposed therein, the drive tunnel having a top portion defining an operator seat area and generally downwardly extending sidewalls positioned on opposite longitudinal sides of the track, the drive tunnel having generally horizontal footrests extending outwardly laterally from each sidewall;
• left and right elongate side coolers each having a hollow interior in fluid communication with liquid coolant passages in the engine defining a coolant circuit that dissipates heat generated by the engine, each side cooler extending longitudinally and mounted at an outer edge of a respective footrest and extending above the outer edge of the respective footrest to define a footwell with the respective footrests and sidewalls;
• and
• a pump for circulating coolant through the coolant circuit.

A snowmobile having a liquid-cooled engine, the snowmobile comprising:

• a chassis including a longitudinally extending drive tunnel having an endless drive track disposed therein, generally horizontal footrests extending outwardly laterally from opposite sides of the chassis;
• left and right elongate side coolers that dissipate heat generated by the engine, each side cooler having a hollow interior in fluid communication with liquid coolant passages inside the engine defining a coolant circuit, each side cooler extending longitudinally and mounted at an outer edge of a respective footrest to form a footwell, each side cooler having a plurality of heat exchanging anti-skid studs extending outward from the surface of the respective side cooler;
• and
• a pump for circulating coolant through the coolant circuit.

A snowmobile having a liquid-cooled engine, the snowmobile comprising:

• a longitudinally extending drive tunnel having an endless drive track disposed therein, the drive tunnel having a top portion defining an operator seat area and generally downwardly extending sidewalls positioned on opposite longitudinal sides of the track, the drive tunnel having generally horizontal footrests extending outwardly laterally from each sidewall;
• left and right elongate side coolers each having a hollow interior in fluid communication with liquid coolant passages in the engine defining a coolant circuit that dissipates heat generated by the engine, each side cooler extending longitudinally and mounted at an outer edge of a respective footrest to form a footwell, each side cooler having heat exchanging anti-skid studs extending outward from the surface of the respective side cooler;
• and
• a pump for circulating coolant through the coolant circuit.