many thanks Andy for your quick reply - I continued checking the pressure drop on both both cylinders and these are the results : - Both cylinders held pressure for a considerable amount of time but the 4.5 P.S.I on the lower cylinder never changed even after 24 hours.The motor is really "tight" - at what point in time does it become necessary to change out the crank ??

AFTER 5 MINUTES AFTER 8 HOURS AFTER 12 HOURS AFTER 16 HOURS AFTER 24 HOURS

PRESSURIZING THE LOWER CYLINDER INTAKE 7 P.S.I 5.25 P.S.I 3.5 P.S.I

EXHAUST 7 P.S.I 5.25 P.S.I NO RESULTS NO RESULTS 3.5 P.S.I

UPPER CYLINDER 4.25 P.S.I 4.25 P.S.I 4.25 P.S.I


PRESSURIZING THE UPPER CYLINDER INTAKE 7 P.S.I 5.25 P.S.I 4.75 P.S.I

EXHAUST 7 P.S.I NO RESULTS 5.25 P.S.I 4.75 P.S.I

LOWER CYLINDER 0 P.S.I 0 P.S.I 0 P.S.I