1997 Ski-Doo Factory Shop Manual Volume Two, Page 113Get this manual
Sub-Section 08
Section 03 ENGINE (LIQUID COOLING SYSTEM)
INSPECTION
Check general condition of hoses and clamp tightness
6,7, Radiator and Radiator Protector
Insert radiator protector into radiator C-rail and crimp C-rail at both endsRefer to FRAME 09-02 for radiator removal
DRAINING THE SYSTEM
5, Thermostat
To check thermostat, put in water and heat waterThermostat should open when water temperature reaches the following degreeENGINE 454, 494, 583 and 670 TEMPERATURE 42C (108F)
WARNING
Never drain or refill the cooling system when engine is hotTo drain the cooling system, siphon the coolant mixture from the coolant tankUse primer pump with plastic hose inserted as deep as possible into the lower hose