Replacing Old O2 Sensors When Replacing a Catalytic Converter

Question:

IF I CHANGE SENSORS WITH MY NEW ASSEMBLY SHOULD I RUN IT IN WITH THE OLD SENORS TO BURN OFF ANY POSSIBLE OILS THAT PIPE MAY BE COATED WITH THUS AVOIDING SENSOR CONTAIMATION?

asked by: RICK S

Expert Reply:

I spoke with my contact at Magnaflow and he said it is not going to hurt anything to run your new assembly with the old sensors. He also said that if you are not getting any bad readings from your old sensors, then you do not have to replace them. However, if you do want to put new sensors in and it is more convenient to replace the old sensors with the new sensors during installation, then that is acceptable as well.

I would recommend that you let the entire assembly cool off before replacing the old sensors if you do choose run it with the old sensors.

expert reply by: John H