Nasty sound from engine B47

joakimeg · 06-10-2020, 02:35 PM

Hello,

I have a BMW 3-series with a B47 engine in it.
Attached a video of the sound I am hearing. I first thought it was a transfer case fault or similar, but the sound is there in neutral, just not as high.
Could this be as bad as rod knock? The engine has gone 40k and I haven't heard people having problem with this...

- Thanks!

Enabled · 06-10-2020, 04:39 PM

Any tuning or anything custom done?

Almost sounds like an exhaust leak or a failing injector.

bpope · 10-18-2022, 03:43 PM

Did you get this problem fixed. My engine is doing the same thing, but currently a lot more subtly

06-10-2020, 02:35 PM	#1
joakimeg New Member 9 Rep 18 Posts Drives: BMW 316i 2006 Join Date: Feb 2017 Location: Norway iTrader: (0)	Nasty sound from engine B47 Hello, I have a BMW 3-series with a B47 engine in it. Attached a video of the sound I am hearing. I first thought it was a transfer case fault or similar, but the sound is there in neutral, just not as high. Could this be as bad as rod knock? The engine has gone 40k and I haven't heard people having problem with this... - Thanks!
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06-10-2020, 04:39 PM	#2
Enabled Lieutenant Colonel 1407 Rep 1,800 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	Any tuning or anything custom done? Almost sounds like an exhaust leak or a failing injector. __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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10-18-2022, 03:43 PM	#3
bpope Registered 0 Rep 1 Posts Drives: 2015 220d 140Kw b47 Join Date: Oct 2022 Location: UK iTrader: (0)	Did you get this problem fixed. My engine is doing the same thing, but currently a lot more subtly
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