N55 PWG Rattle??

Saall · 03-18-2021, 07:57 AM

2011 335xi e90 n55 PWG 150,000km

catless dp, charge pipe, intake, MHD stage 1

So I never noticed anything till about 2 days ago.
It's been super nice out so I've been driving with both front windows down. I noticed a slight metallic rattle when decelerating. The sound is only noticeable when something is close to the right side (parked car or building). No rattle when revving on idle, no rattle on accel.

My only concern is if this is the dreaded waste gate rattle.

I know n55s don't rlly suffer from WGR but I'm still concerned.

I'm aware that SOME WGR is normal on n55s, so is what I'm hearing the "normal" rattle?

It occurs from 2-3k rpm (when the engine sound isn't overpoweringly loud)

Sound isn't loud, you have to rlly listen for it. My concern is, if this is in-fact WGR will it get worse over time?

NRigs · 03-18-2021, 08:32 AM

I have had a rattle from day 1. Car was at 40k miles when I got it and I have 130k miles now.

Saall · 03-18-2021, 08:46 AM

Quote:

Originally Posted by NRigs

I have had a rattle from day 1. Car was at 40k miles when I got it and I have 130k miles now.

Quote:

Originally Posted by NRigs

I have had a rattle from day 1. Car was at 40k miles when I got it and I have 130k miles now.

Did it get worse over time like the n54s?

nicked8 · 03-18-2021, 08:47 AM

Mine rattles a bit on deceleration when the engine is cold - usually don't hear anything once it's warmed up.

NRigs · 03-18-2021, 09:16 AM

Quote:

Originally Posted by Saall

Did it get worse over time like the n54s?

I honestly haven't paid attention to it much over the years so I can't say for sure. Maybe a tiny bit. Also not even sure if it is wgr. My car is peaking at 20 psi and tapers to 16 psi at redline so my turbo is working pretty well. If your logs look good I wouldn't worry about anything.

Welcome to NBA Jam · 03-18-2021, 08:45 PM

Eh mine's been like that pretty much since I've had it. Hasn't ever affected anything in 7 years. Hasn't gotten better, hasn't gotten worse.

TheGoodTheBadTheUgly · 03-18-2021, 09:55 PM

Quote:

Originally Posted by Welcome to NBA Jam

Eh mine's been like that pretty much since I've had it. Hasn't ever affected anything in 7 years. Hasn't gotten better, hasn't gotten worse.

Same here, I think it's just how it is.

anjuna · 03-27-2021, 10:50 AM

You can adjust this a few different ways.

Depends on what you’re doing in terms of tuning, if anything.

MHD’s stage 1 can be easily replicated by anyone with the stock BIN and the public XDF. Not much happening other than not making it hog rich, adding some timing, and doing the CEL delete for front o2 (which can be added in TunerPro)

03-18-2021, 07:57 AM	#1
Saall New Member 8 Rep 24 Posts Drives: 2011 335xi Join Date: Oct 2020 Location: Canada iTrader: (0)	N55 PWG Rattle?? 2011 335xi e90 n55 PWG 150,000km catless dp, charge pipe, intake, MHD stage 1 So I never noticed anything till about 2 days ago. It's been super nice out so I've been driving with both front windows down. I noticed a slight metallic rattle when decelerating. The sound is only noticeable when something is close to the right side (parked car or building). No rattle when revving on idle, no rattle on accel. My only concern is if this is the dreaded waste gate rattle. I know n55s don't rlly suffer from WGR but I'm still concerned. I'm aware that SOME WGR is normal on n55s, so is what I'm hearing the "normal" rattle? It occurs from 2-3k rpm (when the engine sound isn't overpoweringly loud) Sound isn't loud, you have to rlly listen for it. My concern is, if this is in-fact WGR will it get worse over time?
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03-18-2021, 08:32 AM	#2
NRigs Lieutenant 94 Rep 321 Posts Drives: 2011 BMW 335xi Join Date: Feb 2017 Location: Ma iTrader: (0)	I have had a rattle from day 1. Car was at 40k miles when I got it and I have 130k miles now. __________________ Current: 2011 BMW 335xi \| Wedge Tuned \| Meth \| VRSF DP \| VRSF 5" Intercooler \| VRSF Chargepipe \| BMS Intake \| xHP Stg 3 Totaled:2014 Audi A4 CTS K04 APR Tuned
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03-18-2021, 08:47 AM	#4
nicked8 Private First Class 103 Rep 139 Posts Drives: 2013 E92 335i M-Sport xDrive Join Date: Aug 2019 Location: CT/NY iTrader: (0)	Mine rattles a bit on deceleration when the engine is cold - usually don't hear anything once it's warmed up.
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03-18-2021, 08:45 PM	#6
Welcome to NBA Jam Is it the shoes!? 3884 Rep 5,112 Posts Drives: (Sold) 2011 E92 335i ZMP 6MT Join Date: Mar 2014 Location: USA iTrader: (1)	Eh mine's been like that pretty much since I've had it. Hasn't ever affected anything in 7 years. Hasn't gotten better, hasn't gotten worse.
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03-27-2021, 10:50 AM	#8
anjuna First Lieutenant 307 Rep 394 Posts Drives: f25 Join Date: Feb 2017 Location: houston iTrader: (0)	You can adjust this a few different ways. Depends on what you’re doing in terms of tuning, if anything. MHD’s stage 1 can be easily replicated by anyone with the stock BIN and the public XDF. Not much happening other than not making it hog rich, adding some timing, and doing the CEL delete for front o2 (which can be added in TunerPro)
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