1999 Ski-Doo Factory Shop Manual Volume Two, Page 104Get this manual
Subsection 02
Section 04 ENGINE (443 AND 503 ENGINE TYPES)
NOTE: Engine must be removed from chassis to perform the following proceduresRemove engine from chassisRemove fan guard, rewind starter, starting pulley, trigger coil wire from 4-connector housing, magneto flywheel then fan housingRemove stator plate
INSPECTION
Refer to ENGINE DIMENSIONS MEASUREMENT 04-04
ASSEMBLY
Smear anti-seize lubricant (PN 413 701 000) on part of crankshaft where bearing fitsTo check proper clearance between bearing no3 and counterweight, use feeler gauge (PN 420 876 620)Mount second bearing with distance gauge (PN 420 876 822) for 443 engine and (PN 420 876 824) for 503 engine for proper positioning1 2
CLEANING
Discard all seals, gaskets and O-ringsClean all metal components in non-ferrous metal cleanerUse gasket remover (PN 413 708 500) accordinglyRemove all trace of Loctite 242 from crankshaft taperRemove old sealant from crankcase mating surfaces with Bombardier gasket remover (PN 413 708 500)-