Intermittent dragging noise after turbo & DP install..

BeastMode335i · 03-18-2016, 10:07 AM

So I got my new turbos on and new 3" DP's installed, and everything is running great! Just one thing that started happening that I don't know where it's coming from but I'm trying to figure it out.. I drove around for about an hour yesterday and I noticed a very intermittent dragging noise that was kind of sporadic and didn't seem relative to speed but I'm not 100% just yet on that as I couldn't replicate it and it really only happened 2-3 times in that one hour, but it was very audible from inside the vehicle and was only noise, no change in steering, braking, etc and I felt no vibrations.. However, when I got out and looked under the car there was nothing there that could be causing this that I could see.. I haven't installed any of the plastics back on yet, belly pan, engine covers, etc. because I was still checking for leaks and what not so I know it's not any of those things.. I thought maybe it was my downpipes touching the subframe but it doesn't sound like metal on metal at all, it literally sounds like a piece of plastic dragging under my car.. When I put all the plastics back on tomorrow I'll check and see if I can figure it out, but just figured I'd post this to see if anyone else has experienced this and perhaps could point me in the right direction prior to me getting under there tomorrow..

Thanks!

Jklad · 03-18-2016, 10:45 AM

Is your trans cover removed also?

BeastMode335i · 03-18-2016, 10:56 AM

Quote:

Originally Posted by Jklad

Is your trans cover removed also?

Yes that's removed as well..

EDIT: I think you unintentionally possibly solved this for me haha..!! I just looked again and saw nothing dragging by any means, but the plastic part that the transmission cover screws into was hanging about 1/2" down, and I flicked it with my finger and it flapped up/down.. Not sure if this is my issue but tomorrow after I put everything back together we'll see..!!

Stroker1 · 03-18-2016, 04:16 PM

Same thing happened to me as i tested car without belly pan after doing some maintenance. Wind catches center cover and pulls it down. Need to tie wrap it up as you test. scared the crap out of me at *** mph.

Stroker1 · 03-18-2016, 04:17 PM

Ready to officially retire your smoking thread? Hope its all good!!!

BeastMode335i · 03-18-2016, 06:47 PM

Quote:

Originally Posted by Stroker1

Ready to officially retire your smoking thread? Hope its all good!!!

Haha yes sir..!!

Jklad · 03-18-2016, 07:56 PM

Quote:

Originally Posted by BeastMode335i

Quote:

Originally Posted by Jklad

Is your trans cover removed also?

Yes that's removed as well..

EDIT: I think you unintentionally possibly solved this for me haha..!! I just looked again and saw nothing dragging by any means, but the plastic part that the transmission cover screws into was hanging about 1/2" down, and I flicked it with my finger and it flapped up/down.. Not sure if this is my issue but tomorrow after I put everything back together we'll see..!!

Haha happened to me - it's always the dumbest thing!

BeastMode335i · 03-18-2016, 08:02 PM

Quote:

Originally Posted by Stroker1

Ready to officially retire your smoking thread? Hope its all good!!!

Haha yeah bro, problem solved..!

03-18-2016, 10:07 AM	#1
BeastMode335i Maximus Decimus Meridius 1164 Rep 4,643 Posts Drives: F30 335i Join Date: Apr 2014 Location: Down South iTrader: (2)	Intermittent dragging noise after turbo & DP install.. So I got my new turbos on and new 3" DP's installed, and everything is running great! Just one thing that started happening that I don't know where it's coming from but I'm trying to figure it out.. I drove around for about an hour yesterday and I noticed a very intermittent dragging noise that was kind of sporadic and didn't seem relative to speed but I'm not 100% just yet on that as I couldn't replicate it and it really only happened 2-3 times in that one hour, but it was very audible from inside the vehicle and was only noise, no change in steering, braking, etc and I felt no vibrations.. However, when I got out and looked under the car there was nothing there that could be causing this that I could see.. I haven't installed any of the plastics back on yet, belly pan, engine covers, etc. because I was still checking for leaks and what not so I know it's not any of those things.. I thought maybe it was my downpipes touching the subframe but it doesn't sound like metal on metal at all, it literally sounds like a piece of plastic dragging under my car.. When I put all the plastics back on tomorrow I'll check and see if I can figure it out, but just figured I'd post this to see if anyone else has experienced this and perhaps could point me in the right direction prior to me getting under there tomorrow.. Thanks! __________________ F30 335i Melbourne Red Metallic M-Sport Package Last edited by BeastMode335i; 03-18-2016 at 10:14 AM..
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03-18-2016, 10:45 AM	#2
Jklad Lieutenant Colonel 422 Rep 1,643 Posts Drives: 2007 335i Coupe Join Date: Nov 2010 Location: Palatine, IL iTrader: (0)	Is your trans cover removed also? __________________ 2007 E92 335i MT
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03-18-2016, 04:16 PM	#4
Stroker1 Private 35 Rep 91 Posts Drives: 07 335 cp dci, ***dp's, jb4 Join Date: Sep 2015 Location: atlanta ga iTrader: (0)	Same thing happened to me as i tested car without belly pan after doing some maintenance. Wind catches center cover and pulls it down. Need to tie wrap it up as you test. scared the crap out of me at *** mph.
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03-18-2016, 04:17 PM	#5
Stroker1 Private 35 Rep 91 Posts Drives: 07 335 cp dci, ***dp's, jb4 Join Date: Sep 2015 Location: atlanta ga iTrader: (0)	Ready to officially retire your smoking thread? Hope its all good!!!
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