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O2 sensor pics. Warped. #4596136
12/06/17 01:30 PM
12/06/17 01:30 PM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
2011 Equinox 2.4l.
Just had it rebuilt, curtisy of GM, for oil burning.
While MUCH better gas mileage average, it still wasn't the best. Acceleration was sluggish and the instantaneous gas mileage on the dic showed about 3 or 4 mpg durring take off. Even wgen i barely touched the pedal.
Dealer never replaced the o2 sensor. "No code, no problem"...right /s

I bought an oem ac delco for $36 on Amazon and replaced it.
DIC now shows about 8 mpg on take off and much more power.

Will see long term if average mpg improves.

Just 65k on the car. Bought it a year ago.

First pic is new one. Rest is old one.
Notice the warping. I pulled it a few days ago for first time and there was white crust on one side. The white crust is no longer there today when I replaced it.






Last edited by Iowegian; 12/06/17 01:33 PM.

2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: O2 sensor pics. Warped. [Re: Iowegian] #4596182
12/06/17 02:17 PM
12/06/17 02:17 PM
Joined: Mar 2008
Posts: 6,141
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 6,141
Michigan
Wow


2003 Mercury Grand Marquis. PP HM 5w-30 and Fram Ultra
2008 Sebring Hardtop convertible. PP HM 5w-30 and Fram Ultra
2006 Kawasaki Vulcan 900 LT. Motul 7100 10w-40 and K&N
Re: O2 sensor pics. Warped. [Re: Iowegian] #4596192
12/06/17 02:22 PM
12/06/17 02:22 PM
Joined: Jan 2008
Posts: 10,979
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,979
OH
I bet it seems much better on acceleration.

Re: O2 sensor pics. Warped. [Re: Iowegian] #4596200
12/06/17 02:31 PM
12/06/17 02:31 PM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Much better


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: O2 sensor pics. Warped. [Re: Iowegian] #4596211
12/06/17 02:43 PM
12/06/17 02:43 PM
Joined: Jan 2017
Posts: 2,040
VW Fanboy Island
maxdustington Offline
maxdustington  Offline
Joined: Jan 2017
Posts: 2,040
VW Fanboy Island
I've read that white build up on an 02 sensor is silicone contamination. Don't quote me though I read that years ago and am not a pro mechanic by any means.


03 Jetta AWP/09A 205k kms
Edge 0W40 + Mann 719/30
Re: O2 sensor pics. Warped. [Re: maxdustington] #4596236
12/06/17 03:20 PM
12/06/17 03:20 PM
Joined: Dec 2016
Posts: 7,201
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,201
Waco, TX
Originally Posted By: maxdustington
I've read that white build up on an 02 sensor is silicone contamination. Don't quote me though I read that years ago and am not a pro mechanic by any means.


White crust is usually oil ash.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: O2 sensor pics. Warped. [Re: Linctex] #4596365
12/06/17 06:16 PM
12/06/17 06:16 PM
Joined: Aug 2006
Posts: 9,888
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,888
Central Washington
Originally Posted By: Linctex
Originally Posted By: maxdustington
I've read that white build up on an 02 sensor is silicone contamination. Don't quote me though I read that years ago and am not a pro mechanic by any means.


White crust is usually oil ash.


If it was burning such an exorbitant amount of oil that GM actually replaced the engine, then I wonder if there was so much ash on there it acted as an insulator which caused it to overheat and warp like that. Certainly the remnants are left on the side that is warped the most. Very wierd.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 86k
Pennzoil Conv HM 5W30, Fram XG2
Re: O2 sensor pics. Warped. [Re: Colt45ws] #4596374
12/06/17 06:31 PM
12/06/17 06:31 PM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Originally Posted By: Colt45ws
Originally Posted By: Linctex
Originally Posted By: maxdustington
I've read that white build up on an 02 sensor is silicone contamination. Don't quote me though I read that years ago and am not a pro mechanic by any means.


White crust is usually oil ash.


If it was burning such an exorbitant amount of oil that GM actually replaced the engine, then I wonder if there was so much ash on there it acted as an insulator which caused it to overheat and warp like that. Certainly the remnants are left on the side that is warped the most. Very wierd.


It was also the side that was crusty white.
They just replaced the pistons, rings, tensioner chain and a couple other parts.

The catalytic converter was exceeding 1800 deg f durring the time it was burning oil.


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: O2 sensor pics. Warped. [Re: Iowegian] #4596419
12/06/17 07:21 PM
12/06/17 07:21 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
lowegian, did you pull the oxygen sensor on just a hunch ?

Re: O2 sensor pics. Warped. [Re: Iowegian] #4596440
12/06/17 07:38 PM
12/06/17 07:38 PM
Joined: Feb 2011
Posts: 6,779
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,779
Hudson, NH
Somebody banged the muffla


06 Escalade 6.0L LQ9 AWD 165k M1 0w40
03 Maxima 3.5L POS 152k ST HM 10w30
Re: O2 sensor pics. Warped. [Re: Merkava_4] #4596504
12/06/17 08:21 PM
12/06/17 08:21 PM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Originally Posted By: Merkava_4
lowegian, did you pull the oxygen sensor on just a hunch ?


In a way, yes.
Still thought it was sluggish. O2 sensor that is going bad can cause it. + oil burning in it's history. Figured it might be bad and crusty. Didn't expect it to be warped.


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: O2 sensor pics. Warped. [Re: LeakySeals] #4596507
12/06/17 08:21 PM
12/06/17 08:21 PM
Joined: Nov 2017
Posts: 683
South Carolina
eyeofthetiger Offline
eyeofthetiger  Offline
Joined: Nov 2017
Posts: 683
South Carolina
Originally Posted By: LeakySeals
Somebody banged the muffla


Wit a hamma, I magine.


2017 Ford Fiesta 1.0T - Valvoline SynPower 5W-20, Motorcraft FL910S
1988 GMC K1500 4.3/700R4 - Supertech 15W-40, Fram TG3980
1986 Ford Ranger 2.0 - uhh
Re: O2 sensor pics. Warped. [Re: Iowegian] #4596826
12/07/17 07:31 AM
12/07/17 07:31 AM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Of course, I may have a cracked exhaust manifold too...


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: O2 sensor pics. Warped. [Re: Iowegian] #4596834
12/07/17 07:39 AM
12/07/17 07:39 AM
Joined: Sep 2015
Posts: 1,600
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,600
USA
I have seen the cage get completely burnt off in normal operation.

Check for a cracked manifold or other leaks by idling the engine and having someone block the tailpipe with a rag while you listen at the front of the car. Leaks will make a hissing sound when pressure builds up.

Re: O2 sensor pics. Warped. [Re: Iowegian] #4596981
12/07/17 09:56 AM
12/07/17 09:56 AM
Joined: Jun 2003
Posts: 5,951
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,951
Illinois
I monitor my O2 temp on my turbo Gen Coupe. It will see 1600F with out much effort with the gas pedal.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
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