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#4596136 - 12/06/17 01:30 PM O2 sensor pics. Warped.
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: 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.







Edited by Iowegian (12/06/17 01:33 PM)
_________________________
2011 Equinox, 2.4l
2009 Sienna, 3.5l

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#4596182 - 12/06/17 02:17 PM Re: O2 sensor pics. Warped. [Re: Iowegian]
ZZman Offline


Registered: 03/17/08
Posts: 5765
Loc: Michigan
Wow
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2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40

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#4596192 - 12/06/17 02:22 PM Re: O2 sensor pics. Warped. [Re: Iowegian]
SatinSilver Offline


Registered: 01/24/08
Posts: 10128
Loc: OH
I bet it seems much better on acceleration.

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#4596200 - 12/06/17 02:31 PM Re: O2 sensor pics. Warped. [Re: Iowegian]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: Iowa
Much better
_________________________
2011 Equinox, 2.4l
2009 Sienna, 3.5l

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#4596211 - 12/06/17 02:43 PM Re: O2 sensor pics. Warped. [Re: Iowegian]
maxdustington Online   content


Registered: 01/21/17
Posts: 608
Loc: Toronna
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.
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03 Jetta AWP/09A 200k kms
TGMO 0W20 "Legend" & Hella Magnet Filter

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#4596236 - 12/06/17 03:20 PM Re: O2 sensor pics. Warped. [Re: maxdustington]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: 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.
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#4596365 - 12/06/17 06:16 PM Re: O2 sensor pics. Warped. [Re: Linctex]
Colt45ws Offline


Registered: 08/15/06
Posts: 9637
Loc: 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.
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2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
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2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2

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#4596374 - 12/06/17 06:31 PM Re: O2 sensor pics. Warped. [Re: Colt45ws]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: 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

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#4596419 - 12/06/17 07:21 PM Re: O2 sensor pics. Warped. [Re: Iowegian]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
lowegian, did you pull the oxygen sensor on just a hunch ?

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#4596440 - 12/06/17 07:38 PM Re: O2 sensor pics. Warped. [Re: Iowegian]
LeakySeals Offline


Registered: 02/18/11
Posts: 6561
Loc: Hudson, NH
Somebody banged the muffla
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06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 149k ST HM 10w30

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#4596504 - 12/06/17 08:21 PM Re: O2 sensor pics. Warped. [Re: Merkava_4]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: 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

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#4596507 - 12/06/17 08:21 PM Re: O2 sensor pics. Warped. [Re: LeakySeals]
eyeofthetiger Offline


Registered: 11/18/17
Posts: 683
Loc: 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

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#4596826 - 12/07/17 07:31 AM Re: O2 sensor pics. Warped. [Re: Iowegian]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: Iowa
Of course, I may have a cracked exhaust manifold too...
_________________________
2011 Equinox, 2.4l
2009 Sienna, 3.5l

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#4596834 - 12/07/17 07:39 AM Re: O2 sensor pics. Warped. [Re: Iowegian]
mk378 Offline


Registered: 09/27/15
Posts: 1414
Loc: 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.

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#4596981 - 12/07/17 09:56 AM Re: O2 sensor pics. Warped. [Re: Iowegian]
SHOZ Offline


Registered: 06/28/03
Posts: 5742
Loc: Illinois
I monitor my O2 temp on my turbo Gen Coupe. It will see 1600F with out much effort with the gas pedal.
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2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual

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