1979 Ski-Doo Supplementary Shop Manual, Page 68Get this manual
SECTION 04 SUB-SECTION 02 (ENGINES)
ROTARY VALVECOOLANT PUMP
CLEANING
Discard all oil seals and "0" ringsClean all metal components in non-ferrous meta cleanerFor example: 132 opening 50 closing Using ang le finde r, mark crankcase at 132 from bottom edge of magneto side inlet port
DISASSEMBLYASSEMBLY
Torque to 20 N- (15 ft-Ibs) Rotary va lve adjustment when replacing crankcase having no ti ming marksREQU IRED TOOLS