2004 Bombardier Quest/Traxter Series Shop Manual, Page 83Get this manual
Section 03 ENGINE QUEST Subsection 03 (LEAK TEST)
Supply combustion chamber with air pressureDIAGNOSE
Listen for air leaks air escaping on intake portcarburetor means leaking intake valve(s) air escaping on exhaust port means leaking exhaust valve(s) air bubbles out of radiator means leaking cylinder head gasket airoil escaping from crankcase means damaged gasket andor loosened screws (refer to GEARBOX) aircoolant escaping from cylinderhead means damaged gasket(s) andor loosened screws (refer to CYLINDER AND HEAD) air escaping into crankcase area means excessively worn cylinder andor broken piston ringsNOTE: For all the checkpoints mentioned above see the appropriate engine section to diagnose and repair the engine