oxygen sensors

ninety15.0 said:

Yup...they are in the h-pipe and the only good way to get to them to replace them is to drop the H-pipe. this process is sort of a pain in the ass but after u have done it a couple times it gets pretty easy. Jack the front of the car up and i used a impact wrench with a long ass extension on it and removed the bolt on the h-pipe/header flange. then remove the bolts on the h-pipe/flow tube flange on the other end by the muffs. Then disconnect the air tube that goes from teh second set of cats up to the smog pump, and disconnect the oxygen sensor wires from the little harness. then you should be able to pull it out. Once its out u need an oxygen sensor wrench that looks like a regular crescent wrench but doesnt go all the way around the sensor. take em out and reverse the proccess to put it all back in again. I would suggest soking all those bolts with rust penetrant an our or so before you do the job...mayb even with the engire warm. good luck man

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