1985 Ski-Doo snowmobile Service Manual, Page 185Get this manual
Sub-section 09
Section 02 ENGINE (537 ENGINE TYPE)
6,15, Seals
At seal assembly, apply light coat of lithium grease on seal lips For bearing lubrication purpose, gap of 1.0 mm (040") must be maintained between seals and bearinqs When installing plain seals (seal without locating ring or without spacing legs), ensure to maintain the specifid gap as illustratedFor seals with spacing legs, install them against the bearing
NOTETorque the two smaller bolts15 and 16) on magneto side to N-m (SO Ibf-in)
1,3,25, Loctite 242, angular tubes (oil inletoil outlet)cover screws
Apply Loctlte 242 on threads prior to assembly angular tubes
23,27,28, Crankcase M8 Screws
Torque the crankcase MS screws to 20 N-m (15Ibf-ft)
22, Crankcase M6 screws