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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Blue smoke
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      07-11-2022, 05:16 PM   #1
Bloom_435i
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Recently my 435i has been blowing blue smoke but only after idling for a little bit then once you go, it smokes. Also there is no smoke while driving.The car drives the same and the car isn't throwing any codes. Tomorrow I'm going to check in the chargepipe to see if theirs oil in it. Just looking for any ideas of what it could be. I'm leaning towards bad valve guide seals because another forum member had also experienced this.
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      07-11-2022, 06:02 PM   #2
thejeremyman9
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Oil in inlet/TIC/IC/CP is blowby from CCV hose.

Oil going directly into the combustion chamber is likely valve guide seals as you mentioned

Oil going into DP and burning off in the exhaust can be turbo seals.

Just need to figure out where the oil is
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      02-05-2025, 01:39 PM   #3
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Quote:
Originally Posted by Bloom_435i View Post
Recently my 435i has been blowing blue smoke but only after idling for a little bit then once you go, it smokes. Also there is no smoke while driving.The car drives the same and the car isn't throwing any codes. Tomorrow I'm going to check in the chargepipe to see if theirs oil in it. Just looking for any ideas of what it could be. I'm leaning towards bad valve guide seals because another forum member had also experienced this.
were you able to pinpoint and resolve this issue? Experiencing something similar w my n55
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