Today I started my son's 95 Nissan Altima and heard an exhaust leak. Looked under the car and saw the cat convertor's O2 sensor dangling. Seems it just blew out, as all of the threads on the sensor are gone. So I cleaned the mating areas and applied JB Weld. Car will sit for about 15 hours before he uses it again. Anyone care to guess how long this might last; an hour, day, week, or?

regards,
Mark