1978 Ski-Doo Shop Manual, Page 198Get this manual
SECTION 04 SUB-SECTION 02, (ENGINES) (
BOTTOM END
CLEANING
Discard all oil seals, gaskets, "0" rings and sealing rinqsClean all metal components in non-ferrous metal cleanerRemove old sealant from crankcase mating surfaces with Bombardier sealant stripperCAUTION: Never use sharp object to scrape away old sealant as score marks incurred are detrimental to crankcase sealing01t is recommended to wrap Teflonpipe tape around threads
Apply Loctite Lock'n Seal 242 on threads prior to
assembly)Because of cap nuts, cylinder studs have to be screwed into crankcase so that they do not protrude further than 15.6 cm (6.140")If it is not possible to obtain this length, washer must be added between cylinder head and cap nutApply Loctite Lock'n Seal 242 on the threads of the two studs screwed above the intake ports
and therefore, are not interchangeable or available as single halvesPrior to joining of crankcase halves, apply l.octite 515 (no413702700) on mating surfacesCAUTION: Before joining of crankcase halves be sure that crankshaft rotary valve gear is well engaged with rotary valve shaft gearPosition the crankcase halves together and tighten nut by hand then install armature plate (tighten) on magneto side to correctly align the crankcase halvesTorque bolts to 22 Nom (16 ft-lbs) following illustrated sequence15.6 em