1985 Ski-Doo snowmobile Service Manual, Page 167Get this manual
Section 02 ENGINE Sub-section 08 (532 ENGINE TYPE)
INSPECTION
Check general condition of hoses and clamp tightness
DISASSEMBLYASSEMBLY
1,22, Plugsender
Apply thread sealant on sender and plug to avoid leaks
DRAINING THE SYSTEM
WAR ING: Never drain or refill the cooling system when engine is hot
8, Pressure cap
Check if the cap pressurizes the system If not, install new cap Do not exceed 90 kPa (13 Ibs) of pressure
To drain cooling system:Use length of hose long enough to drain coolant into container lower than engine- Remove the engine coolant hose from water pump- Connect "drain hose" onto water pump- Put both hose ends into the container- Remove coolant tank cap and lift the rear of the vehicle to drain the heat exchangers- Remove the engine bleed screw (plug)
20, ihermostat
To check thermostat, put it in water and heat waterThermostat should open when water temperature reaches 43C(11OF) Install the thermostat with its hole on top of the housing