05-31-2018, 02:45 PM | #1 |
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E70 4.8i white smoke from exhaust
Hi,
Since 1 week, we got a white smoke from exhaust when we start to accelerate. After that it's ok. It's only happened when we are on a redlight (iddle) and when the light turn green... and we start .... white smoke. Do you have an ideal on it? The vehicule is a E70 with 4.8 engine. Thank you !
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05-31-2018, 03:18 PM | #2 |
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I'm not as familiar with the N62 motor, but possibly valve guide seals?
If it were the N63 (xDrive50i) I would say that's a very possible reason for the white smoke. A very, very costly repair. What's your mileage? |
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05-31-2018, 08:24 PM | #3 |
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Yeah are you around 80k by chance?
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06-01-2018, 10:40 AM | #4 | |
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It's a truck for work. Always on road.
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06-01-2018, 12:00 PM | #5 | |
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I did a quick Google search and it appears the N62 is plagued by the same value guide seal issues as the N63, so given that, and your mileage, I'd say they're a likely culprit to the white smoke coming out the exhaust I don't know about the N62, but dealer cost to replace them on the N63 is close to $10,000. Most fail between 50K-120K miles. A proper inspection from a trained technician would probably be a good idea. You might need to sell that thing quick! |
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06-01-2018, 02:51 PM | #7 | ||
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06-04-2018, 12:22 PM | #9 |
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That sounds a touch high but in the ballpark - which is tough to rationalize when you can get an X5 with under 50k for the same money. I just got mine 2007 41k 4.8 for $13k.
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06-04-2018, 01:41 PM | #10 | |
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I think most will just get rid of their vehicle when this repair comes up out of warranty...unless they know a good (and reasonable) indy. Luckily i was covered by warranty. |
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06-26-2018, 11:05 AM | #11 |
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Check your crankcase ventilation hoses. I had white smoke coming out of my exhaust when idling or stop and go traffic. Bmw told me i needed valve seals to be replaced and i said hell no. Went to a indy german shop specialist and said i needed crankcase ventilation hoses to be replaced and thats whats causing oil consumption plus white smoke from exhaust. my 2011 x5 50i has 70,000 miles with no extended warranty but luckily my crankcase ventilation hoses under warranty for 10 years or 120,000 miles on my vehicle. Went back to the stealership and insisted to replace the crankcase ventilation hoses since part index is the old version. They took the car for 5 days and replaced 4 fuel injectors in the second bank and replaced the crankcase ventilation hoses and voila the white smoke stopped coming from exhaust and my oil consumption decreased dramatically. Now i add 1 quart of oil every 1800 miles instead of 950 miles intervals. Check and see if your ventilation hoses are covered even if you dont have warranty the parts were extended on certain vehicles. I hope this can solve your issue.
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06-28-2018, 04:46 AM | #12 |
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Sounds like classic valve stem seals. I had a 4.8i that did this too. Pretty much all n62s need them at around 80k miles, n63 which use the same seals seem to kill them sooner. Pcv can also contribute.
The test for valve stem seal failure. Warm the engine up fully. Once fully wam, let it idle for say 5 minutes. With a buddy outside watching the exhaust.... stomp the gas and floor it. If the car smokes you have bad valve stem seals. Cheapest I’ve seen for the job is 2500 from a guy on the east coast. More like 4K typically. I had great luck with atp 205 seal treatment stopping the smoke. You can buy it on amazon. Lucas oil also works to eliminate the smoke and reduce oil consumption. |
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06-29-2018, 11:13 AM | #13 |
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White smoke is usually coolant, blueish smoke is oil. N62's do have an issue with the valve stem seals failing.
Pray you are not burning coolant which can be a failed head gasket. But highly doubt that. I would check/replace your 3 CCV/PCV's first and if it smokes after that it's definitely the VSS. You can rent the tools and do the job yourself and fix this issue with improved seals and only be out of pocket $500 or so including all the parts and etc. This is the last "repair" to do list on my X5. |
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06-30-2018, 08:45 PM | #14 | |
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Because replacing the valve seals .... it's really really expensive to replaced. (Cost more than the complet car lol).
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07-02-2018, 12:47 PM | #15 |
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Yup, it is definitely the valve stem seals. It is happening with my E70 4.8 X5 (2007) too. It is definitely burning coolant.
I've had the problem at around 80k miles (3 years ago), as expected. But instead of replacing it, I've decided to drive the car until the engine breaks because the car isn't worth that much anymore. The car is at 108k miles right now, and its still running fine, though I don't drive it on road trips anymore. As for the oil consumption part, it really depends on how you drive the car. When I pamper the car, I normally refill 1 quart every 1,200 miles. But when I redline it often, it can drop to 600-800 miles. If you've owned your X5 since the beginning like me, then I think you should just drive it til the car dies and get another one, perhaps an X5m (used). These cars, especially the 4.8, are worth nothing nowadays. Good luck! |
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07-03-2018, 10:40 AM | #17 |
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Oh yeah, I forgot to mention one thing. You should constantly check your coolant levels. Mine goes below minimum every week. If you notice your coolant is constantly low, then the valve stem seals are definitely gone in your car.
Therefore, I advise you to always keep a gallon of OEM BMW coolant in your car for emergencies. Also regarding oil consumption, it is completely normal for BMW's and Audi's to consume a bit of oil. “Oil consumption is normal on all engines,” BMW spokesman Hector Arellano-Belloc said in an e-mailed statement. “BMW vehicles have long intervals between oil changes (10,000 miles). BMW engines (excluding the BMW M) may consume up to one quart of engine oil per 750 miles under certain driving conditions.” He added that BMW’s M performance models may consume even more oil than that. Source- (https://www.consumerreports.org/cro/...tion/index.htm) |
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07-20-2018, 04:08 PM | #19 | |
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Usually what craps out on a 48i that causes a lot of coolant loose is the engine water transfer pipe https://www.bavauto.com/bmw-coolant-...RoCcsQQAvD_BwE Love the sound of my old 4.8i, and it was a reliable tow partner. But damn damn the bad bmw service person did a bad touch. he kept touching me in my back pocket where my wallet was. |
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08-02-2018, 07:52 AM | #20 |
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Drop Oil Level a lil bit, but not much.
And for coolant, I don't lose coolant, it always on max line.
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08-02-2018, 12:07 PM | #21 |
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So that means it's not burning coolant, it's burning oil through the valve stem seals but it's not that bad if you are only burning a little for now.
But it will worsen as time goes, I'm on the same boat as you are. I burn about 1/2-1 Qt every 1500-2000 miles and only get puff of smoke when I free rev the car after an extended idle of 5+ minutes. |
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08-03-2018, 10:05 AM | #22 | |
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We have exactly the same issue...
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