They make special sockets and wrenches to get the old O2 sensors out, but (if possible), I unhook the wires from the harness, cut the wires off of the old O2 sensor and put a close-ended wrench over it. I then use a torch to get the old O2 very hot. Usually, the old one then comes out even if you have to use a lot of persuasion. The last one I did on a '97 Ford F250 fought me the whole way, squeaking and complaining, but the female threads remained in good shape while the threads on the old O2 sensor looked terrible. Your good replacement O2 sensors already have the thread coating on them and if you use a name-brand replacement, hopefully you'll never have to worry about that one again.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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