Burnt oil smell and smoke from exhaust

Cullen550ix · 05-20-2023, 01:27 PM

I’ve got a 2016 550i with around 85k miles. I’ve recently replaced the crank case ventilation system because it was broken and I thought was the cause for all the burnt oil and smoke. It has since become a lot better. But I’m still having white smoke from the exhaust at idle and the car smells of burnt oil. I’m losing about 3 quarts of oil between intervals. Any ideas what it could be?

SamirSami · 06-15-2023, 05:41 AM

valve stem seals

SWFLf10 · 06-15-2023, 12:52 PM

This is a known issue with the valve stem seals getting brittle and letting oil leak by. The BMW N63 V8 engines are know for this. It seems to be less common with the N63TU versions.

It may not do anything, but I add some Liqui Moly Oil Saver during my oil changes to help keep the rubber seals from drying out. Worth a shot in my opinion to see if it help at all with lessening the issue.

05-20-2023, 01:27 PM	#1
Cullen550ix New Member 0 Rep 5 Posts Drives: BMW 550i xdrive Join Date: Feb 2022 Location: Wyoming iTrader: (0)	Burnt oil smell and smoke from exhaust I’ve got a 2016 550i with around 85k miles. I’ve recently replaced the crank case ventilation system because it was broken and I thought was the cause for all the burnt oil and smoke. It has since become a lot better. But I’m still having white smoke from the exhaust at idle and the car smells of burnt oil. I’m losing about 3 quarts of oil between intervals. Any ideas what it could be? __________________ 2016 BMW 550i xdrive. ARM catless downpipes, ARM intake system, Jb4 tune
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06-15-2023, 05:41 AM	#2
SamirSami New Member 2 Rep 5 Posts Drives: 09/2012 F10 530i/N52B30 Join Date: Oct 2022 Location: Baghdad iTrader: (0)	valve stem seals
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06-15-2023, 12:52 PM	#3
SWFLf10 Captain 374 Rep 639 Posts Drives: 2016 Alpina B6, 2015 535i Join Date: Jun 2018 Location: Florida iTrader: (0) Garage List 2016 BMW Alpina B6 ... [10.00] 2015 BMW 535i [8.83]	This is a known issue with the valve stem seals getting brittle and letting oil leak by. The BMW N63 V8 engines are know for this. It seems to be less common with the N63TU versions. It may not do anything, but I add some Liqui Moly Oil Saver during my oil changes to help keep the rubber seals from drying out. Worth a shot in my opinion to see if it help at all with lessening the issue.
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