2004 Ski-Doo Racing Handbook, Page 108Get this manual
SECTION 04ENGINE PREPARATION
ENGINE LEAK VERIFICATION FLOW CHART
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PRESSURIZE ENGINE NO
IS ENGINE LEAKING? YES CHECK ALL JOINTED SURFACES, SCREWSTUD THREADSMOUNTING FLANGES ETCYES REPLACE GASKET OR O-RING, RE-SEAL LEAKING AREA
ANY LEAK FOUND? NO CHECK SMALL OIL LINES OF INJECTION PUMP
AIR BUBBLES FOUND OR OIL MOVING TOWARD PUMP? NO REMOVE BLEED SCREW ON CYLINDER HEAD
REPLACE INJECTION NIPPLE(S)
ARE ANY AIR BUBBLES IN COOLANT? NO BLOCK HOSE OF PUMP SHAFT GEAR LUBRICATION SYSTEM NO
REPLACE O-RING OF CYLINDER HEAD ANDOR CYLINDER BASE GASKET
IS ENGINE STILL LEAKING? YES CHECK CRANKSHAFT OUTER SEAL OF PTO AND MAG SIDES YES
ARE SEALS LEAKING? NO PRESSURIZE PUMP SHAFT GEAR RESERVOIR IN CRANKCASE PRESSURIZE PUMP SHAFT GEAR RESERVOIR IN CRANKCASE