1985 Ski-Doo snowmobile Service Manual, Page 129Get this manual
Section 02 ENGINE Sub-section 06 (467 ENGINE TYPE)
INSPECTION
Check general condition of hoses and clamp tightness
15, Thermostat
To check thermostat, put in water and heat waterThermostat should open when water temperature reaches 3JOC (98F)Install the hole in thermostat on top of the housing
DRAINING THE SYSTEM
WARNING: Never drain or refill the cooling system when engine is hot
To drain the cooling system, siphon the coolant mixture from the coolant tank, using primer pump and length of plastic hose and steel tubing inserted as deep as possible into the lower hose of the tank6.u""'"' Coolant
REFILLING THE SYSTEM
Capacity: Approximately 4.2 liters (148 Impoz (142 U.Soz 55 antifreeze45 water
r CAUTION: To prevent rust formation or freezing
T condition, always replenish the system with 55 antifreeze and 45 waterPure antifreeze without water produces premature freezingAlways use ethylen glycol antifreeze containing corrosion inhibitors specifically recommended for aluminum enginesTo refill cooling system:Put back the rear of vehicle on the ground- Refill coolant tank slowly until coolant overfills at bleed hole- Reinstall bleed SCrew- Continue to pour coolant in the tank until level reaches 25 mm (1") below filler neck- With the coolant tank cap still removed, start engine and let it warm up to reach its normal operating temperature and thermostat openAllow it running few minutes more- Stop engine and check coolant levelRefill as required then put back the cap