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I need to replace the front O2 sensors in my stock 02 Z06. Is there a definitive procedure written up anywhere? Do I have to drop the exhaust? Can I do it on my back with the car on stands? Does it take a lot of foul language and adult beverage breaks to accomplish? Any hints or tips appreciated.
Definitive procedure:
Drive it up on ramps
Remove old ones
Replace with new ones
Seriously, pretty easy to get to and replace as long as you have enough room underneath.
How do you know both need replacing? Seems odd to me.
I need to replace the front O2 sensors in my stock 02 Z06. Is there a definitive procedure written up anywhere? Do I have to drop the exhaust? Can I do it on my back with the car on stands? Does it take a lot of foul language and adult beverage breaks to accomplish? Any hints or tips appreciated.
Thanks!
I replaced my front sensors a couple of weeks ago by means of this tool.
I had my car raised enough to be able to lay under my car , below the exaust headers . I run my motor a short while so the headers was a little bit warm before I loosend the sensor by means of this tool shown below. If the headers gets to hot you burn your skinn on your fingers .
Here is pictures of both right and left new sensors taken from below .
As you see there is not space to rotate the tool .
Definitive procedure:
Drive it up on ramps
Remove old ones
Replace with new ones
Seriously, pretty easy to get to and replace as long as you have enough room underneath.
How do you know both need replacing? Seems odd to me.
A prominent contributor to the forum recommended it due to the mileage on the car (~80K) and the codes I'm getting. Lean codes on both sides after the car warms up at just about the time the car reaches normal operating temperature. Then most of the time but not always after a restart. I can clear them from the DIC and they don't return as I drive. He said the quality of gasoline with the alcohol in it can really ruin the sensors in cars not really designed for it. I have a pair so I'm going to install them and go from there.
Installing a Vararam intake is what really started it. I'd never had one before. All connections are tight since I was afraid it was due to an air leak. The MAF is still in the stock location using the stock air bridge.
Last edited by CaseyJones; Jun 20, 2016 at 05:05 PM.
I replaced my front sensors a couple of weeks ago by means of this tool.
I had my car raised enough to be able to lay under my car , below the exaust headers . I run my motor a short while so the headers was a little bit warm before I loosend the sensor by means of this tool shown below. If the headers gets to hot you burn your skinn on your fingers .
Here is pictures of both right and left new sensors taken from below .
As you see there is not space to rotate the tool .
Agreed I would buy the socket, especially if a line wrench doesn't fit. I've changed the O2s on my stock Prelude and a couple of C5s with LTs, much prefer the socket.
Sometimes it looks like you can just use a regular wrench on it but they always seem to slip and want to round the sensor.
I would also use Delco O2s, one of the name brand aftermarket sensors liked to give members problems. I'd have to research it all over again to find out which one.
A prominent contributor to the forum recommended it due to the mileage on the car (~80K) and the codes I'm getting. Lean codes on both sides after the car warms up at just about the time the car reaches normal operating temperature. Then most of the time but not always after a restart. I can clear them from the DIC and they don't return as I drive. He said the quality of gasoline with the alcohol in it can really ruin the sensors in cars not really designed for it. I have a pair so I'm going to install them and go from there.
Installing a Vararam intake is what really started it. I'd never had one before. All connections are tight since I was afraid it was due to an air leak. The MAF is still in the stock location using the stock air bridge.
I am not a prominent contributor, but... did you have your car tuned after the Vararam install? I think that might be the cause. Might have thrown your A/F ratio off just enough to cause codes. Just my non prominent 2 cents.
LOL! No, i didn't want to drop names about those who know enough to help sometimes. Some like to throw flames about it.
I was told over and over that the Vararam, if installed properly, would not cause the codes. It is just replacing the factory air box. I'm also using the honeycomb screen in the MAF as others recommended. I want to get a tune soon anyway and just haven;t had the time or money. Tick Performance indicated that they required a clean MAF and new O2 sensors prior to a tune session so I need to do it anyway. I live near them so it's convenient.
I run my motor a short while so the headers was a little bit warm before I loosend the sensor by means of this tool shown below. If the headers gets to hot you burn your skinn on your fingers .
I would also use Delco O2s, one of the name brand aftermarket sensors liked to give members problems. I'd have to research it all over again to find out which one.
Bosch, Denso hit and miss
Knock sensors absolutely use Delco i learned the hard way
Replacing front O2 sensors
