1978 Ski-Doo Shop Manual, Page 168Get this manual
SECTION 04 SUB-SECTION 02, (.ENGINES)
BOTTOM END
CLEANING
Discard all oil seals, gaskets, "0" ringsand sealing ringsClean all metal components in non-ferrous metal cleanerRemove old sealant from crankcase mating surfaces with Bombardier sealant stripper_ CAUTION: Never use sharp object to scrape away old sealant as score marks incurred are detrimental to crankcase sealing
DISASSEMBLYASSEMBLY
CDCrankcase halves are factory matched and therefore, are not interchangeable or available as single halvesPrior to joining of crankcase halves, apply light coat of Loctite 515 (413702700) on mating surfaces_ CAUTION: 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 torque bolts to 22 Nsrn (16 ft-lbs) following illustrated sequence15