Engine Leak Verification Flow Chart - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

Section 04 ENGINE
Subsection 05 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)

ENGINE LEAK VERIFICATION FLOW CHART

PRESSURIZE PUMP SHAFT GEAR
RESERVOIR IN CRANKCASE
IS RESERVOIR LEAKING?
NO
04-05-4
ENGINE LEAK VERIFICATION
FLOW CHART
PRESSURIZE ENGINE
NO
IS ENGINE LEAKING?
YES
CHECK ALL JOINTED SURFACES,
SCREW/STUD THREADS. MOUNTING
FLANGES ETC.
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
ARE ANY AIR BUBBLES IN COOLANT?
NO
BLOCK HOSE OF PUMP SHAFT
GEAR
LUBRICATION SYSTEM
NO
IS ENGINE STILL LEAKING?
YES
CHECK CRANKSHAFT OUTER
SEAL OF PTO AND
MAG SIDES
ARE SEALS LEAKING?
NO
PRESSURIZE PUMP SHAFT GEAR
RESERVOIR IN CRANKCASE
YES
IS RESERVOIR LEAKING?
NO
UNSEAL PTO CYLINDER AND MAG
CYLINDER SEPARATELY
IS RESERVOIR LEAKING?
NO
CHECK LEAKAGE AT DRAIN HOLE
YES
BELOW COOLANT PUMP HOUSING
ANY LEAK FOUND?
NO
CHECK OIL PUMP
MOUNTING AREA FOR LEAKS
IS O-RING LEAKING?
NO
CAREFULLY INSPECT ENGINE CASTINGS,
PARTICULARLY THE THREAD HOLE AREAS
ANY LEAK FOUND?
NO
ENGINE IS PERFECTLY SEALED
INTERNALLY
YES
REPLACE GASKET OR O-RING,
RE-SEAL LEAKING AREA
YES
REPLACE INJECTION NIPPLE(S)
YES
REPLACE O-RING OF CYLINDER HEAD
AND/OR CYLINDER BASE GASKET
YES
REPLACE DEFECTIVE SEAL(S)
YES
REPLACE DEFECTIVE SEAL(S)
REPLACE OIL SEAL OF PUMP
YES
SHAFT CERAMIC, BESIDE
COOLANT SEAL
YES
REPLACE DEFECTIVE O-RING
YES
REPLACE DEFECTIVE PARTS
MMR2004-114_04_05A.FM