1985 Ski-Doo snowmobile Service Manual, Page 147Get this manual
Section 02 ENGINE Sub-section 07 (503 ENGINE TYPE)
A017002007
1,2, Lower and upper crankcase
Crankcase halves are factory matched and therefore, are not interchangeable as single halves
6, Loctite 515
Prior to joining of crankcase halves spray some new injection oil (or equivalent) on all moving parts of the crankshaftThen apply Loctite 515 (413 702700) on crankcases mating surfaces
NOTE: Prior to apply Loctite 515 It is possible to use primer (PIN 413 705300) or primer NF (PIN 413 702400) It increases cure speed and gap filling capabilityRefer to supplier instructions