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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 07-24-2014, 12:51 AM
barenickle barenickle is offline
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Exclamation White Smoke

Please help,

I have been driving 318i 06 plate, now very exhaust with the mechanics even the bmw independent specialist they are just trying to get rid off,

Basically bought the car last year and notice after couple of days about the 02 sensor, had been changed o2 sensor plus engine oil level sensor and all lights were gone but on motorway engine check light went on, did the test they said need the both sensors again, I did changed twice and car started smoke when I pull up the car on 1 and 2nd gear, meanwhile lights was ON, the mechanic said need to replace that electric thingy might it is failing the sensors again and again,

Regarding the smoke he said once 02 sensor changed then no more smoke from exhaust but he failed to be honest, got another option from independent bmw mechanic that lets change the breather chain valve which separate the coolant and oil i think, it is the cheapest way to stop the smoke, after this 2 hours job I was on road but seen the white smoke, contacted the mechanic and got reply from him that 'Change the Engine' awww spend arround £1500 but still not sorted, now not using the car anymore but need to sort this out before i put on sale,

Guys your help would be appriciated.

Thanks

Din
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  #2  
Old 07-24-2014, 06:52 AM
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Zooks527 Zooks527 is offline
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Not the easiest problem description to understand (you should avoid highly technical terms such as "electric thingy"), but I'll make a passing comment.

White smoke on a warm day with a fully warm engine is typically a sign of coolant leakage, through a head gasket or the like. If you're sure it's white (and not a light blue, indicative of oil in the exhaust stream), I'd be looking at possible coolant leakage, as opposed to replacing the sensors yet again.

Or, Habemus Papem.
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  #3  
Old 07-24-2014, 06:58 AM
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DSXMachina DSXMachina is offline
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Hello Din, welcome to Bimmerfest.
It sounds like your coolant is getting into the combustion system. In other words, anti-freeze is being burned inside the cylinders. The anti-freeze is what causes the white smoke, and it will 'poison' your O2 sensors right away. That is why your O2 sensors are going bad, they are being killed by the coolant in the exhaust.
The most common cause of this problem is a defective cylinder head gasket. If the engine is good except for the gasket, the gasket can be changed. You must find out locally what the cost of that will be. First, you must make sure that there is no other damage to the engine. Only a good technician can check for that.
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  #4  
Old 07-24-2014, 07:00 AM
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DSXMachina DSXMachina is offline
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Originally Posted by Zooks527 View Post
Not the easiest problem description to understand (you should avoid highly technical terms such as "electric thingy"), but I'll make a passing comment.

White smoke on a warm day with a fully warm engine is typically a sign of coolant leakage, through a head gasket or the like. If you're sure it's white (and not a light blue, indicative of oil in the exhaust stream), I'd be looking at possible coolant leakage, as opposed to replacing the sensors yet again.

Or, Habemus Papem.
WTH? (I know what it means.)
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  #5  
Old 07-24-2014, 07:54 AM
barenickle barenickle is offline
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Thanks very much, I will try to change head gasket, if gasket is ok then any other reason you think ?
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  #6  
Old 07-24-2014, 08:09 AM
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Originally Posted by DSXMachina View Post
WTH? (I know what it means.)
A small stove and chimney are installed in the Sistene during elections. If an inconclusive vote is taken, the ballots are burned in the stove mixed with straw, which produces black smoke. If a conclusive vote is taken, the ballots alone are burned in the stove, resulting in white smoke. You watch the chimney. If you see black smoke, you wait some more. Once you see white smoke, you gather below the balcony to wait for the announcement.
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Last edited by Zooks527; 07-24-2014 at 08:11 AM.
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  #7  
Old 07-24-2014, 11:18 AM
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DSXMachina DSXMachina is offline
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Originally Posted by Zooks527 View Post
A small stove and chimney are installed in the Sistene during elections. If an inconclusive vote is taken, the ballots are burned in the stove mixed with straw, which produces black smoke. If a conclusive vote is taken, the ballots alone are burned in the stove, resulting in white smoke. You watch the chimney. If you see black smoke, you wait some more. Once you see white smoke, you gather below the balcony to wait for the announcement.
Cut me some slack George. There's a stained glass window in St. Christopher Church here in Nashua with my name on it (literally).
I know the whole election process but was too slow to keep up with your wit before a second cup of java this morning. But...good one, habemus Papem it is.
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  #8  
Old 07-24-2014, 11:25 AM
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Originally Posted by barenickle View Post
Thanks very much, I will try to change head gasket, if gasket is ok then any other reason you think ?
Replacing a head gasket is a lengthy and expensive repair. Your technician must first verify that the symptoms match the cause. There are a couple definitive tests which can be done which will narrow down the possibilities. One looks for carbon monoxide in the cooling system, another checks to see if one cylinder, or two adjacent cylinders, leak down at an excessive rate when pressurized.
Have you had any codes for any faults other than O2 sensor related? Have you been overheating? Have you been losing coolant without seeing any on the ground?
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Old 07-24-2014, 11:42 AM
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There's a stained glass window in St. Christopher Church here in Nashua with my name on it (literally).
Which beats all hell out of a similarly outfitted granite stone in the churchyard!

That's one thing that ticked my mother off no end when she contributed a window when her church was rebuilt. Instead of doing the "brass plate beneath", the parish put a "Donors" board in the narthex. Years later, she'll still tell you she's convinced they were selling each window multiple times.
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  #10  
Old 07-24-2014, 04:18 PM
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  #11  
Old 07-25-2014, 12:41 AM
barenickle barenickle is offline
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Quote:
Originally Posted by DSXMachina View Post
Replacing a head gasket is a lengthy and expensive repair. Your technician must first verify that the symptoms match the cause. There are a couple definitive tests which can be done which will narrow down the possibilities. One looks for carbon monoxide in the cooling system, another checks to see if one cylinder, or two adjacent cylinders, leak down at an excessive rate when pressurized.
Have you had any codes for any faults other than O2 sensor related? Have you been overheating? Have you been losing coolant without seeing any on the ground?
Thanks very much for your reply.

Well the electric thingy was Alternator :P
He changed the CVV and also gasket seals for oil leakage, no engine management light on at the moment even engine is not overheating, but the smoke smells like oil burning.

I've heard need to look into the pistons might problem is in there.

regards

Din
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  #12  
Old 07-25-2014, 05:25 AM
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DSXMachina DSXMachina is offline
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Originally Posted by barenickle View Post
Thanks very much for your reply.

Well the electric thingy was Alternator :P
He changed the CVV and also gasket seals for oil leakage, no engine management light on at the moment even engine is not overheating, but the smoke smells like oil burning.

I've heard need to look into the pistons might problem is in there.


regards

Din
Symptomatic of oil burning. Are you sure the smoke is "white"? Someone needs to properly diagnose this, and it is impossible from a mile away let alone 3000 miles. Find yourself a highly recommended garage and pay them to do it.
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  #13  
Old 07-25-2014, 06:30 AM
Watchme Watchme is offline
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Oil burning? Compression and a leak-down test.
You need to make sure it's definitely oil, though.
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  #14  
Old 07-25-2014, 07:55 AM
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Oil burning? Compression and a leak-down test.
You need to make sure it's definitely oil, though.
Agreed.
Worn rings-bad valve seats-blown head gasket. All can give exactly the same readings on compression and leak down tests. Still requires further evaluation.
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  #15  
Old 07-25-2014, 02:57 PM
barenickle barenickle is offline
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Right, now got the point so I'm thinking not to spend more money because it will useless paying for nothing.

Thanks everyone

Cheerx


Sent from BimmerApp mobile app
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  #16  
Old 07-26-2014, 09:15 AM
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DSXMachina DSXMachina is offline
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This thread has been the Bimmerfest equivalent of a Seinfeld episode.
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  #17  
Old 07-26-2014, 11:24 AM
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Originally Posted by DSXMachina View Post
Hello Din, welcome to Bimmerfest.
It sounds like your coolant is getting into the combustion system. In other words, anti-freeze is being burned inside the cylinders. The anti-freeze is what causes the white smoke, and it will 'poison' your O2 sensors right away. That is why your O2 sensors are going bad, they are being killed by the coolant in the exhaust.
The most common cause of this problem is a defective cylinder head gasket. If the engine is good except for the gasket, the gasket can be changed. You must find out locally what the cost of that will be. First, you must make sure that there is no other damage to the engine. Only a good technician can check for that.

OK! But will they detox après coolant leak fix?

.

Last edited by CALWATERBOY DUE; 07-26-2014 at 01:44 PM.
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Old 07-26-2014, 11:35 AM
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Originally Posted by DSXMachina View Post
Cut me some slack George. There's a stained glass window in St. Christopher Church here in Nashua with my name on it (literally).
I know the whole election process but was too slow to keep up with your wit before a second cup of java this morning. But...good one, habemus Papem it is.

This is amazing! DSXMachina in stained glass, which we presume predates DSX Machinery. Could it be prophecy?
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  #19  
Old 07-26-2014, 11:50 AM
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This thread has been the Bimmerfest equivalent of a Seinfeld episode.
Not that there's anything wrong with that.
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Old 07-26-2014, 12:06 PM
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This thread has been the Bimmerfest equivalent of a Seinfeld episode.
I shudder at the character I may be playing.
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Old 07-26-2014, 02:51 PM
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I shudder at the character I may be playing.
Hellooo...Newman.
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  #22  
Old 07-26-2014, 02:52 PM
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OK! But will they detox après coolant leak fix?

.
Not in my experience. The silica plates out on the sensor and when it's dead it's dead.
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  #23  
Old 07-26-2014, 04:41 PM
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Not in my experience. The silica plates out on the sensor and when it's dead it's dead.

There must be aluminum in there....why they don't use a hydrophobic organic film former like steam systems have I'll never know - all that is required is a tiny bit of organic in demineralized water. Shazam! Water cannot contact metals, so they do not corrode. Maybe it's a vibration issue.

Back in the 80's Bell & Gosset stopped warrantying their seals if silicate was used. Makes excellent abrasive grit with certain minerals in water.

.

Last edited by CALWATERBOY DUE; 07-26-2014 at 04:44 PM.
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Old 07-26-2014, 07:17 PM
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Hellooo...Newman.
Oh, thank God. I thought I was Elaine.
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Old 07-26-2014, 10:40 PM
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Originally Posted by CALWATERBOY DUE View Post
There must be aluminum in there....why they don't use a hydrophobic organic film former like steam systems have I'll never know - all that is required is a tiny bit of organic in demineralized water. Shazam! Water cannot contact metals, so they do not corrode. Maybe it's a vibration issue.

Back in the 80's Bell & Gosset stopped warrantying their seals if silicate was used. Makes excellent abrasive grit with certain minerals in water.

.
And I think we've found our Kramer.

(He's so sane I just blew my mind)
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