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post #1 of 5 (permalink) Old 11-16-2009, 10:10 PM Thread Starter
 
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O2 removal on 90 cougar

Have a 90 cougar with the 3.8 NA engine and was going to change the drivers side O2 sensor, but discovered the steering shaft is in my way.

What have you guys found to be a good way or the recommended way to remove the drivers side sensor?

Also will need to replace the riders side one here soon, so any tips for that would be helpful as well.

Thanks!
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post #2 of 5 (permalink) Old 11-16-2009, 10:20 PM
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yep that shaft is conveniently located right in the way

i just disconnected it, one little 13mm bolt and she pulls right up, its a collapsable joint so you can push her up and out the way a good bit, if that doesn't suffice theres a 17mm bolt holding the rag joint to the steering shaft.

mine was pretty tightly locked up on there with years of weathering being the culprit, i took a 7/8 IIRC open end wrench and cut it in two. I then disconnected the o2 sensor wiring connector and fed it through the closed end of the cut wrench. I securely placed the wrench in the appropriate manor and put a piece of pipe on her to use as a breaker bar.

20 seconds later out with the old and in with the new.

supercoupin'

www.EFIDynoTuning.com
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post #3 of 5 (permalink) Old 11-17-2009, 11:30 AM
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they make 02 sensor sockets with a slit up one side of a deep socket to take into account for the wires on the 02. not a bad idea to get one. one of those tools its nice to have when the time calls for it.

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post #4 of 5 (permalink) Old 11-19-2009, 08:43 AM Thread Starter
 
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Thanks guys!!

Gotta change these out, cause the car has almost 150,000 miles on it and I have no idea if the sensors are original yet or not.

Probably are.

Would it help any if the car was warmed up to loosen these out or doesnt it really matter?

Course I do have a torch so I could heat up the threads as well without all the extra heat.
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post #5 of 5 (permalink) Old 11-24-2009, 10:13 PM
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You just need a 7/8" wrench and wrenching skills. If you are too weak to break it loose, make sure you have the wrench on it as straightly and completely as possible and whack the wrench with a hammer in a manner that will cause it to turn the o2 sensor counter-clockwise.
-Rob

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