O2 Sensor Stuck
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Junior User
Joined: Jun 2006
Posts: 99
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From: Newmwnstown, PA
O2 Sensor Stuck
I've finally gotten the OBDI code that my O2 sensor is bad. So, it's time to change it after 201K miles. I sprayed Liquid Wrench on it 5 hours ago and it seems permanently connected to the catalytic pipe. I plan to let it sit overnight and try again in the morning. Any suggestions to get this thing unscrewed??
Thanks,
Michael
'93 Aero 3.0L
'93 Aero 4.0L
Thanks,
Michael
'93 Aero 3.0L
'93 Aero 4.0L
Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
First step to trying to remove a stubborn fastener is to make sure you get a good grip on it. I have a large metric box-end wrench that grabs the entire hex body. They can be gotten cheaply from Harbor Freight Tools. Of course, a large pipe wrench with a long pipe slipped over the handle can work quite well.
Second thing is to make sure you torque in the right direction. If you're slightly off to an angle from exactly perpendicular, you could be making it a lot more difficult than it should be, and you can break things that you don't want broken.
Maybe heating will help, but I'm not so certain. The HEGO sensor spends its life in a very hot environment.
Second thing is to make sure you torque in the right direction. If you're slightly off to an angle from exactly perpendicular, you could be making it a lot more difficult than it should be, and you can break things that you don't want broken.
Maybe heating will help, but I'm not so certain. The HEGO sensor spends its life in a very hot environment.
Freshman User
Joined: May 2006
Posts: 43
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From: southern colorado
By coincidence I just changed my O2 sensor yesterday, after 146,000 miles.
A few minutes soak with penetrant, a 7/8 inch open end wrench and several smacks with a heavy hammer and it easily came out.It had anti-seize on its threads, and the new one (Bosch) came with anti-seize also. Maybe I was extra lucky on this job???
A few minutes soak with penetrant, a 7/8 inch open end wrench and several smacks with a heavy hammer and it easily came out.It had anti-seize on its threads, and the new one (Bosch) came with anti-seize also. Maybe I was extra lucky on this job???
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Elder User
Joined: Apr 2005
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From: Wichita
Originally Posted by coldgeorge
By coincidence I just changed my O2 sensor yesterday, after 146,000 miles.
A few minutes soak with penetrant, a 7/8 inch open end wrench and several smacks with a heavy hammer and it easily came out.It had anti-seize on its threads, and the new one (Bosch) came with anti-seize also. Maybe I was extra lucky on this job???
A few minutes soak with penetrant, a 7/8 inch open end wrench and several smacks with a heavy hammer and it easily came out.It had anti-seize on its threads, and the new one (Bosch) came with anti-seize also. Maybe I was extra lucky on this job???
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Thread Starter
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Junior User
Joined: Jun 2006
Posts: 99
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From: Newmwnstown, PA
SUCCESS on the O2 Sensor removal!
Overnight Liquid Wrench soak, pipe wrench, and a couple whacks with a hammer. I put too much force into the initial push of the pipe wrench -- it came loose much easier than I had expected and I tore off the usual amount of knuckle meat when my clenched hand hit something at the back of the engine. I had gone two days working on my Aero without bleeding...I was due some blood.
The tranny filter replacement and gentle flush were uneventful yesterday. I think I need to connect some sort of small valve to pump out the 2 quarts easier than removing a hose each time. Any suggestions?
Replacement of that tiny tranny cooler in the front fender was much messier than I had expected. But, I think the new heavy duty Hayden in front of the condensor will help keep the tranny temp down.
The tranny seems to be shifting much easier now. I don't get the 3-2 slip on a left-hand turn now. The old tranny filter had completely disintegrated. The screen inside was completely gone. Where did it go?
Thanks for all your help...
Michael
'93 Aero 3.0L 2WD Ext
'94 Aero 4.0L 2WD Ext
Overnight Liquid Wrench soak, pipe wrench, and a couple whacks with a hammer. I put too much force into the initial push of the pipe wrench -- it came loose much easier than I had expected and I tore off the usual amount of knuckle meat when my clenched hand hit something at the back of the engine. I had gone two days working on my Aero without bleeding...I was due some blood.
The tranny filter replacement and gentle flush were uneventful yesterday. I think I need to connect some sort of small valve to pump out the 2 quarts easier than removing a hose each time. Any suggestions?
Replacement of that tiny tranny cooler in the front fender was much messier than I had expected. But, I think the new heavy duty Hayden in front of the condensor will help keep the tranny temp down.
The tranny seems to be shifting much easier now. I don't get the 3-2 slip on a left-hand turn now. The old tranny filter had completely disintegrated. The screen inside was completely gone. Where did it go?
Thanks for all your help...
Michael
'93 Aero 3.0L 2WD Ext
'94 Aero 4.0L 2WD Ext
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
old worn out tired burned by slipping bands and clutches tranny ATF is nasty corrosive stuff. full of water, acids, abrasive particles...the old filter screen was ate up by the acids.
i would change the ATF again in 500>1k miles to flush all that old varnish and goop out...bound to be loads in the valve body and torque converter which take time to be removed by the fresh ATF detergents...
then put in a full bottle of Lubeguard "Red" in the 2nd change of fresh ATF
glad u got her going
what did you find in the bottom of the tranny pan?
i would change the ATF again in 500>1k miles to flush all that old varnish and goop out...bound to be loads in the valve body and torque converter which take time to be removed by the fresh ATF detergents...
then put in a full bottle of Lubeguard "Red" in the 2nd change of fresh ATF
glad u got her going
what did you find in the bottom of the tranny pan?
Last edited by 96_4wdr; Mar 10, 2007 at 10:14 PM.
Postmaster
Joined: Sep 2003
Posts: 4,452
Likes: 1
From: Southern California
Micheal:
Here is how you flush the transmission
https://www.ford-trucks.com/forums/s...6&postcount=32
Here is how you flush the transmission
https://www.ford-trucks.com/forums/s...6&postcount=32
Thread Starter
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Junior User
Joined: Jun 2006
Posts: 99
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From: Newmwnstown, PA
Originally Posted by 96_4wdr
old worn out tired burned by slipping bands and clutches tranny ATF is nasty corrosive stuff. full of water, acids, abrasive particles...the old filter screen was ate up by the acids.
i would change the ATF again in 500>1k miles to flush all that old varnish and goop out...bound to be loads in the valve body and torque converter which take time to be removed by the fresh ATF detergents...
then put in a full bottle of Lubeguard "Red" in the 2nd change of fresh ATF
glad u got her going
what did you find in the bottom of the tranny pan?
i would change the ATF again in 500>1k miles to flush all that old varnish and goop out...bound to be loads in the valve body and torque converter which take time to be removed by the fresh ATF detergents...
then put in a full bottle of Lubeguard "Red" in the 2nd change of fresh ATF
glad u got her going
what did you find in the bottom of the tranny pan?
96_4wdr, thanks for the advice to reflush the tranny. I will do that in a couple weeks.
As for the bottom of the tranny pan...didn't see all that much there. It looked and felt like a thick, dark gray paste. The magnet had most of this dark paste clinging to it. There were no pieces of anything unusual, only this very fine paste. The old fluid still had a sort of reddish tint to it. But, it definitely wasn't as red or clear as the new Valvoline fluid. I figure with 201K miles on her, I am living on borrowed time and plan to rebuild it as my first tranny rebuild project this summer.******** type=text/javascript> vbmenu_register("postmenu_4511262", true); *********>
Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
"thick, dark gray paste."? That does not sound good.
I took the pan off my trans to change the fluid and filter at 60k and again at 120k, and while each time the fluid was burnt, the only thing I found on the bottom of the pan was a barely detectable coat of fine black powder. Hopefully, it won't fail before you get to rebuilding it.
I took the pan off my trans to change the fluid and filter at 60k and again at 120k, and while each time the fluid was burnt, the only thing I found on the bottom of the pan was a barely detectable coat of fine black powder. Hopefully, it won't fail before you get to rebuilding it.
Elder User
Joined: Apr 2005
Posts: 882
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From: Wichita
"There were no pieces of anything unusual, only this very fine paste."
Nothing unusual?? The reason a magnet picked this up is because that is your internal tranny parts slowly disintegrating.
I'm with XLT, I hope you get it rebuild before it quits on you/
Nothing unusual?? The reason a magnet picked this up is because that is your internal tranny parts slowly disintegrating.
I'm with XLT, I hope you get it rebuild before it quits on you/