1982 Ski-Doo Shop Manual, Page 131Get this manual

1982 Ski-Doo Shop Manual, Page 131

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SECTION 02 ENGINE SUB-SECTION 07 (640 ENGINE TYPE)
ENGINE SUPPORT AND MUFFLER DISASSEMBLY AND ASSEMBLY
At assembly on crankcase, apply "Loctite 242" or equivalent on threads
Torque t