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post #1 of 71 Old 15th January 2017, 08:25 AM Thread Starter
ninjabmw
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Blue smoke while reving

The car is 06 m5 with 92k miles on it. When it idles you don't see the smoke that much but when i rev it up to 4-5k rpm you can see the smoke come out like crazy. Plus i am losing a lot of oil the consumption is crazy on 40-50 miles it ate up around .5-.7 liters of oil. Is it the piston rings or the seals? Any help would be appreciated.
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post #2 of 71 Old 15th January 2017, 04:25 PM
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Originally Posted by ninjabmw View Post
The car is 06 m5 with 92k miles on it. When it idles you don't see the smoke that much but when i rev it up to 4-5k rpm you can see the smoke come out like crazy. Plus i am losing a lot of oil the consumption is crazy on 40-50 miles it ate up around .5-.7 liters of oil. Is it the piston rings or the seals? Any help would be appreciated.
What oil you running?
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post #3 of 71 Old 15th January 2017, 04:58 PM
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When did you last change your oil in kms-ago?

If your oil is too thin it could be via the rings. or, it could be from blow-by and related to your oil check valves.

The black smoke says you are likely burning oil - so it's really a case of the oil's fault versus something mechanical.
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post #4 of 71 Old 15th January 2017, 05:06 PM
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don't remember the sequence but it was something like if you blow smoke during acceleration its valves and during deceleration it's rings. Or vice versa. regardless, if switching out to a different oil doesn't cure your woes then your looking at engine work. Good luck and keep us posted.
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post #5 of 71 Old 16th January 2017, 02:30 AM Thread Starter
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I am using the standard 10w-60 oil castrol. I changed the oil 1 month ago but i have been keep adding on it because it is burning crazy when i drive i dont drive it now because of the oil issue i am having. Its blue smoke when it idles you cant see much but when i rev up its crazy and it smells like burning oil.
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post #6 of 71 Old 16th January 2017, 03:13 AM
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It appears to be something mechanical then. The easiest and 'cheapest' thing to check might be the whole CCV circuit looking for issues there relating to if the excess oil is cleared out and returned to the sump properly, no?
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post #7 of 71 Old 16th January 2017, 03:55 AM
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Does the blue smoke come out of BOTH pipes in an even amount? Or does one pipe smoke more than the other?
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post #8 of 71 Old 16th January 2017, 09:27 AM Thread Starter
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Does the blue smoke come out of BOTH pipes in an even amount? Or does one pipe smoke more than the other?

Its coming out even on both sides of the exhaust pipes. When it idles you see some come out but as i rev up its a lot. I will try to get a video of it if i can to show you guys what i mean. Also to address the ccv that Gmak talked about i have changed the non return valves on both sides of the engine.

here is the part that i changed please let me know if you were referring to this thanks

https://www.turnermotorsport.com/p-3...uine-bmw-part/
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post #9 of 71 Old 16th January 2017, 01:11 PM
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Yep. That's it. I really hope I'm wrong - but it's starting to seem like something bigger like valves or rings - as Thumper600 said. IIRC, I read that these cars are known for 'ring leakage'. I hope I'm wrong and that it's something relatively simple.

Would issues in the whole VANOS pump mechanism / hose lead to this? I'm just thinking out loud, here.

Last edited by gmak; 16th January 2017 at 01:14 PM.
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post #10 of 71 Old 16th January 2017, 02:00 PM
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Would issues in the whole VANOS pump mechanism / hose lead to this? I'm just thinking out loud, here.

Nope
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