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**Backfire** · 03-22-2002, 07:08 PM

As far as removing them, heat them and the manifolds up slightly by running the motor for a minute or two. After this, mine came out easy. I didn't have to spray any penetrating oil. The ones I bought had antiseize already on them so I didn't have to add any and it actually said not to.

I can't help on the brand choice. I went with AC Delco replacements, same as factory. In case you want to do this GMPartsDirect has them for about 1/2 the price(before shipping) as the dealer.
Delco PN = AFS-22
GM PN = 25162753

[ March 22, 2002: Message edited by: Backfire ]</p>

**Cale** · 03-22-2002, 08:06 PM

Thanks for the info Backfire

**GregWS6'01** · 03-22-2002, 08:15 PM

<blockquote>quote:</font><hr>Originally posted by Cale:
Thanks for the info Backfire<hr></blockquote>

I'm supposed to say that Cale.....

**GregWS6'01** · 03-22-2002, 11:26 PM

so i guess i have to undo the clip and put the wire up in the socket to start turning it out...is that what i should do with the wire?

What about the clip? Do i undo the wire from the old sensor that's going into the clip and put the new one right in it, or do i have to splice the wire from the new sensor to an old wire coming out of the clip? Hope this isn't confusing

**RedbirdV6** · 03-23-2002, 12:58 AM

Well I got bent over with no lube at Advance Auto Parts, they charged me $60 a piece for new o2's :eek: :mad: Well I wondered why my a$$ hole hurt so bad when I paid them for them [img]graemlins/crybaby.gif[/img] [img]graemlins/thumbsdown.gif[/img]

**3.4-Wraith** · 03-23-2002, 01:42 AM

<blockquote>quote:</font><hr>Originally posted by GregWS6'01:
so i guess i have to undo the clip and put the wire up in the socket to start turning it out...is that what i should do with the wire?

What about the clip? Do i undo the wire from the old sensor that's going into the clip and put the new one right in it, or do i have to splice the wire from the new sensor to an old wire coming out of the clip? Hope this isn't confusing<hr></blockquote>

Yes, very easy install. You don't even need to get the O2 wrench. A regular deep well socket will work fine. The wire simply plugs in.

Josh-

**GregWS6'01** · 03-23-2002, 10:16 AM

Thanks guys.....I'll be tackling that shortly. I may buy the socket, I may not. If i end up buying it, I might resell it on here for someone else that wants it.

**GregWS6'01** · 03-23-2002, 05:24 PM

done...wasn't too bad except trying to find swivel extensions so i could actually get to them. driver side was a sinch......passenger side took a little time...I didn't notice a difference right off the bat.....but i think the car had to adjust to em..Not a noticeable difference but with 105K on the stock ones it was time for some new ones. My passenger side one was burnt black. I might be selling my socket, so if anyone is interested, let me know.

**viper98885** · 03-24-2002, 01:00 AM

I wish I had caught this post earlier. The 3.4's have a one wire O2 sensor...it's a data sending wire only. With a high flow exhaust system, the O2 sensors don't always get hot enough to give a good reading. A few weeks ago, I finally installed two 3-wire O2 sensors (Bosch) that I have had for a while but never installed. I got teh harnesses from GM to hook them in. The difference in the two setups is that the 3-wire is a heated O2 sensor. In this case, the O2 sensor will give a better reading at all times resulting in better engine performance. The O2's are not cheap though...cost around $50 each and the wiring harnesses are about $12 each, but they are not manditory. This mod seems to give better power throughout the rpm range, but I have not dynoed to get a true power change. Throttle response is a lot better and gas mileage is better. If you are in the market for new O2's and have a single wire O2, I would suggest this if you have the money. If nothing else, you will get better has mileage.

**Jeff Pristelski** · 03-24-2002, 10:03 AM

<blockquote>quote:</font><hr> Well I got bent over with no lube at Advance Auto Parts, they charged me $60 a piece for new o2's Well I wondered why my a$$ hole hurt so bad when I paid them for them <hr></blockquote>

98's have 3 O2 sensors on the exhaust, pepboys quoted me
79.99 for 1
69.99 a piece for the other two.

so saving $40 plus tax doesn't sound too bad.

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