1981 Ski-Doo Shop Manual Supplement, Page 33Get this manual
SECTION 03 SUB-SECTION 02 (ENGINES)
INSPECTION
Check general cond ition of hoses and clamp tightness
DISASSEMBLYASSEMBLY
CD Apply
pipe thread sealant to avoid leaks
DRAINING SYSTEM
To drain the cooling system, remove the coolant tank cap
)See if the cap pressurizes the system If not, install new 13 Ibs cap, do not exceed 13 Ibs of pressure