Originally Posted by billyboblyons
I need to replace the oxygen sensor and I have a 7/8 socket. The socket does not bite on the thread. Is this the right size socket. What am I doing wrong?
Go to your local auto parts supply house and ask for an Oxygen Sensor Socket. This is a special socket with several different sizes inside and a slot cut in the side to allow the wires to hang out. This should be all you need to remove the sensor providing it is in a location that permits use of a socket. If you cannot use the socket, use a metric six point box wrench. Unplug the wire connector, slide the wrench on and take it out just like a bolt. It should not be extremely tight. Make sure when you install the new one, it has some anti-sieze on the threads so it will not get heat and corrosion welded to the bung in the pipe.