Followed a LCI 335d today

Gamb1t · 02-12-2020, 02:48 PM

While I was on the freeway commute to work, I came across a LCI 335d. I was behind it and cruised for a few miles. I noticed that the 335d intermittently emits puffs of blue smoke. The driver doesn't appear to be downshifting as we were just all keeping pace with traffic.

The puffs come on every so often and it sure smells. Wanted very much to tell the driver about it, but I think he'd think I'm a lunatic waving to describe puffs of smoke.

Anyway wondering if this is normal for diesel bimmers? I know VW puffs black smoke when they accelerate.

smass · 02-12-2020, 05:11 PM

A deleted diesel will smell and puff smoke as it builds boost. With any BMW turbo diesel engine, deleted or not, any light acceleration builds boost.

Gamb1t · 02-12-2020, 09:21 PM

What's a deleted diesel?

KClemente · 02-12-2020, 11:04 PM

Quote:

Originally Posted by Gamb1t

What's a deleted diesel?

I'm assuming dpf or diesel particle filter. Or his turbos going out

apexit4 · 02-13-2020, 06:59 AM

Quote:

Originally Posted by Gamb1t

What's a deleted diesel?

A deleted diesel is one where some or all of the emissions equipment has been turned off through a tune and quite possibly removed physically. These things include the DPF, EGR and SCR.

The emissions components are know to fail often (and are very expensive), so most owners get a tune that removes them instead of fixing them. Deleted diesels have a tendency to emit some black smoke on acceleration depending on the tune (there are quite a few tune's available). Not the most environmentally friendly option, but they also offer big increases in power and some gains in gas mileage.

CTinline-six · 02-13-2020, 07:02 AM

Quote:

Originally Posted by smass

A deleted diesel will smell and puff smoke as it builds boost. With any BMW turbo diesel engine, deleted or not, any light acceleration builds boost.

Usually black smoke (excess fuel) not blue smoke (burned oil).

e90yyc · 02-13-2020, 07:59 AM

Ah yes the Volkswagen mod!

MPOWER5266 · 02-13-2020, 08:36 AM

Its just rollin a little coal.

SlimE92 · 03-02-2020, 03:34 PM

Quote:

Originally Posted by e90yyc

Ah yes the Volkswagen mod!

Underrated comment..

Persian Whisperjet · 03-08-2020, 12:40 AM

As the youngest 335d's hit nine years there is also a problem with VCGs getting brittle and allowing engine oil to enter the intake manifold and be consumed. So, lots of ways smoke can be generated. My wife's almost-stock 2011 335d generates almost zero smoke or odor. Mine? Well....

02-12-2020, 02:48 PM	#1
Gamb1t Major 598 Rep 1,343 Posts Drives: 330i,X1,Z4,Solstice GXP, RX-8 Join Date: Aug 2015 Location: Canukistan iTrader: (0)	Followed a LCI 335d today While I was on the freeway commute to work, I came across a LCI 335d. I was behind it and cruised for a few miles. I noticed that the 335d intermittently emits puffs of blue smoke. The driver doesn't appear to be downshifting as we were just all keeping pace with traffic. The puffs come on every so often and it sure smells. Wanted very much to tell the driver about it, but I think he'd think I'm a lunatic waving to describe puffs of smoke. Anyway wondering if this is normal for diesel bimmers? I know VW puffs black smoke when they accelerate.
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02-12-2020, 05:11 PM	#2
smass Lieutenant Colonel 398 Rep 1,579 Posts Drives: 06 325i - 10 335i Join Date: Sep 2010 Location: Scottsdale, AZ iTrader: (1) Garage List 2010 E90 335i [0.00] 2016 F15 35i [0.00] 2003 E53 3.0 [0.00] 2006 E90 325i [0.00]	A deleted diesel will smell and puff smoke as it builds boost. With any BMW turbo diesel engine, deleted or not, any light acceleration builds boost.
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02-12-2020, 09:21 PM	#3
Gamb1t Major 598 Rep 1,343 Posts Drives: 330i,X1,Z4,Solstice GXP, RX-8 Join Date: Aug 2015 Location: Canukistan iTrader: (0)	What's a deleted diesel?
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02-13-2020, 07:59 AM	#7
e90yyc Art Collector 2425 Rep 3,448 Posts Drives: 2007 328xi (GM-delete 6MT) Join Date: Feb 2018 Location: Canada iTrader: (0)	Ah yes the Volkswagen mod! __________________ When I'm dead, just throw me in the trash.
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02-13-2020, 08:36 AM	#8
MPOWER5266 Major 4753 Rep 1,189 Posts Drives: 1997 Dinan m3 Join Date: Oct 2017 Location: Ga iTrader: (0)	Its just rollin a little coal.
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03-08-2020, 12:40 AM	#10
Persian Whisperjet Kind of a Big Deal 167 Rep 857 Posts Drives: 2011 335d Join Date: Dec 2012 Location: Washington, D.C. iTrader: (0)	As the youngest 335d's hit nine years there is also a problem with VCGs getting brittle and allowing engine oil to enter the intake manifold and be consumed. So, lots of ways smoke can be generated. My wife's almost-stock 2011 335d generates almost zero smoke or odor. Mine? Well.... __________________
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