1996 Ski-Doo Shop Manual, Volume 1, Page 102Get this manual
Se ion EN GI Sub-Section 03 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
LEAK EST AN EN GI DI EN SI ON EASU REM EN T
LEAK TEST
The following gives verification procedures for liquid cooled engines though it also applies to fan cooled enginesFor FC engines, do not consider information pertaining to coolant system and crankcase rotary valve gear reservoircomponentsOn twin-cylinder engines, each cylinder can not be verified individually due to leakage from one cylinder to the other through rotary valve (except on engines with separate intake manifolds)Besides, on FC engines, leak will occur through labyrinth sleeve in center of crankshaft
10Engine must stand this pressure during minutesIf pressure drops before minutes, check tester kit by spraying soapy solution on pump piston, all plugs and fittings If tester kit is leaking, bubbles will indicate where leak comes from If tester kit is not leaking, check engine as per following procedure
PROCEDURE
NOTEflow chart has been prepared as visual referenceSee last page of sub-section ENGINE 03-01Using flow chart and following text, pressurize area to be tested and spray soapy solution at the indicated location