1972 Ski-Doo Shop Manual, Page 148Get this manual
TWO CYLINDER
NOTE: Do not remove crankcase studs unless damaged or wornIf replacement is necessary, remove studs using two (2) previously removed nuts
ASSEMBLY 1Prior to Assembly procedure, ensure all components have been cleaned, inspected, repa.ired andor replaced as detailed in sub section 2-8NOTE: Crankcase are fabricated in two (2) matched halvesFor this reason, single crank case halves are not interchangeable and are not purchasable as single halves2Assemble crankshaft and determine end play as follows: (a) Place crankshaft bearings into an oil container and heat the oil to 180-190FFigure 2-3-21 shows the method of heating the bearingPuller