F22 M235i Burning Smell and Smoke Out Exhaust

rgiunta1994 · 08-12-2023, 03:36 PM

Hey All,
I have a issue I wanna run by the group. Today I started my M235i and immediately started smelling a really nasty burning smell. It might have been oil, but I can’t remember. It definitely wasn’t sweet like coolant.

Anyways, I pulled the car out of my garage so it’d be in fresh air and was trying to pinpoint it. There was no smell coming from the engine bay and noticed it all coming from the exhaust. At idle it was smoking a fair bit, definitely not cold start condensation and it smelled very intense. The smoke was relatively thin, so it was hard to tell the color at idle and I didn’t want to be blipping the throttle with it smoking like that.

Any insight into what this may be? I scanned the car with MHD and there were no codes pending. Granted, this is the first time it's done it, so it hasn't been driven/in boost to potentially cause a code to be thrown.

Could it be a blown turbo? Maybe PCV?

Any insight on next steps/how best to diagnose it is appreciated!

nazali · 08-14-2023, 12:26 PM

do a head leak down test for HG, check fluids for loss, oil in water gas in coolant

XutvJet · 08-18-2023, 03:29 PM

Any modifications to the car?

How long have you owned it?

08-12-2023, 03:36 PM	#1
rgiunta1994 Registered 0 Rep 1 Posts Drives: F22 M235i; E70 35d; Jeep ZJ Join Date: Aug 2023 Location: San Diego, CA, USA iTrader: (0)	F22 M235i Burning Smell and Smoke Out Exhaust Hey All, I have a issue I wanna run by the group. Today I started my M235i and immediately started smelling a really nasty burning smell. It might have been oil, but I can’t remember. It definitely wasn’t sweet like coolant. Anyways, I pulled the car out of my garage so it’d be in fresh air and was trying to pinpoint it. There was no smell coming from the engine bay and noticed it all coming from the exhaust. At idle it was smoking a fair bit, definitely not cold start condensation and it smelled very intense. The smoke was relatively thin, so it was hard to tell the color at idle and I didn’t want to be blipping the throttle with it smoking like that. Any insight into what this may be? I scanned the car with MHD and there were no codes pending. Granted, this is the first time it's done it, so it hasn't been driven/in boost to potentially cause a code to be thrown. Could it be a blown turbo? Maybe PCV? Any insight on next steps/how best to diagnose it is appreciated!
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08-14-2023, 12:26 PM	#2
nazali Major 1341 Rep 1,146 Posts Drives: 230 2020 vert F23 Join Date: Jun 2020 Location: Total Wack Job iTrader: (0)	do a head leak down test for HG, check fluids for loss, oil in water gas in coolant
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08-18-2023, 03:29 PM	#3
XutvJet Major General 5606 Rep 5,396 Posts Drives: 2011 Cayman Base, 2016 M235 Join Date: Mar 2016 Location: Kansas City iTrader: (-1)	Any modifications to the car? How long have you owned it? __________________ The forest was shrinking, but the Trees kept voting for the Axe, for the Axe was clever and convinced the Trees that because his handle was made of wood, he was one of them.
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