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 - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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