HELP: strange clicking noise underneath the back of air filter box.SOLVED

Jedi_Romeo · 08-10-2018, 03:09 PM

Hi can anyone help me to diagnose this issue I have since getting my car back after turbo rebuild. I'm also getting a check engine light for post cat 02 sensor but unsure if related to this
335i n54
https://youtu.be/QlGHFqTlbqs

tadaska · 08-11-2018, 08:13 AM

Sounds worse than my diesel. Can't help you with the sound though. Maybe replace the "i" with a "D"?

Chappers 71 · 08-11-2018, 08:36 AM

Just do a Google search of 335i engine knocking noise, first result is from e90 post by jsandore92, sounds similar to yours. For him it turned out to be the rod bearings.
Good luck

Jedi_Romeo · 08-11-2018, 02:27 PM

thanks for the replies. The thing is it wasn't making that noise until it went in a garage for the turbos to be stripped sent off for rebuild then reinstalled. I went to pick up car and it was making that noise. It's intermitent and not throwing any codes. The guy at the garage said it was a pump of some sort trying to pull extra air and thats why it starts and stops randomly. I called bs on that because it wasn't making that noise prior to going in to the garage. It went in for wastegate rattle. The turbos were reconditioned by Universal turbos and they are noticeably better. It's frustrating as hell, it doesnt appear to be affecting performance as it's definitely got more power since the recon. i am assuming something must not have been put back on correctly otherwise it's too coincidental.

tadaska · 08-11-2018, 04:39 PM

Try to locate the source of the noise. There are videos on YouTube that show how to do it with a screwdriver and such.

wallsmk2 · 08-16-2018, 10:22 AM

sounds like a compressor..aircon? although I'm sure the aircon compressor is on the other side?

Jedi_Romeo · 09-03-2018, 02:12 AM

I have found the noise. a pipe for something to do with the heater matrix wasn't installed by the garage that "repaired" my car. I popped it back together and the noise is gone.

08-10-2018, 03:09 PM	#1
Jedi_Romeo New Member 2 Rep 15 Posts Drives: e90 335i n54 Join Date: Jun 2018 Location: Bristol,England iTrader: (0)	HELP: strange clicking noise underneath the back of air filter box.SOLVED Hi can anyone help me to diagnose this issue I have since getting my car back after turbo rebuild. I'm also getting a check engine light for post cat 02 sensor but unsure if related to this 335i n54 https://youtu.be/QlGHFqTlbqs Last edited by Jedi_Romeo; 09-03-2018 at 02:12 AM..
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08-11-2018, 08:13 AM	#2
tadaska Major 114 Rep 1,001 Posts Drives: 2006 E90 320D ES Join Date: May 2016 Location: Eastbourne iTrader: (0)	Sounds worse than my diesel. Can't help you with the sound though. Maybe replace the "i" with a "D"? Last edited by tadaska; 08-11-2018 at 08:48 AM..
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08-11-2018, 08:36 AM	#3
Chappers 71 Major General 5477 Rep 5,426 Posts Drives: Beige G31 40ix m sport Join Date: Feb 2016 Location: Kent, The Garden of England iTrader: (0) Garage List 2018 G31 xdrive 40i ... [4.00] 2006 E92 335i SE [9.50]	Just do a Google search of 335i engine knocking noise, first result is from e90 post by jsandore92, sounds similar to yours. For him it turned out to be the rod bearings. Good luck __________________ G31 40ix M Sport E92 335i. E36 328is coupe E39 540i V8 6SP manual E34 3.6 M5. E34 525i sport. VW Jetta Mk2 GTI 16v. 1679cc 1967 resto-cal beetle
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08-11-2018, 02:27 PM	#4
Jedi_Romeo New Member 2 Rep 15 Posts Drives: e90 335i n54 Join Date: Jun 2018 Location: Bristol,England iTrader: (0)	thanks for the replies. The thing is it wasn't making that noise until it went in a garage for the turbos to be stripped sent off for rebuild then reinstalled. I went to pick up car and it was making that noise. It's intermitent and not throwing any codes. The guy at the garage said it was a pump of some sort trying to pull extra air and thats why it starts and stops randomly. I called bs on that because it wasn't making that noise prior to going in to the garage. It went in for wastegate rattle. The turbos were reconditioned by Universal turbos and they are noticeably better. It's frustrating as hell, it doesnt appear to be affecting performance as it's definitely got more power since the recon. i am assuming something must not have been put back on correctly otherwise it's too coincidental.
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08-11-2018, 04:39 PM	#5
tadaska Major 114 Rep 1,001 Posts Drives: 2006 E90 320D ES Join Date: May 2016 Location: Eastbourne iTrader: (0)	Try to locate the source of the noise. There are videos on YouTube that show how to do it with a screwdriver and such.
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08-16-2018, 10:22 AM	#6
wallsmk2 Lieutenant 28 Rep 405 Posts Drives: e91 325i Join Date: Nov 2011 Location: exeter iTrader: (0)	sounds like a compressor..aircon? although I'm sure the aircon compressor is on the other side?
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09-03-2018, 02:12 AM	#7
Jedi_Romeo New Member 2 Rep 15 Posts Drives: e90 335i n54 Join Date: Jun 2018 Location: Bristol,England iTrader: (0)	I have found the noise. a pipe for something to do with the heater matrix wasn't installed by the garage that "repaired" my car. I popped it back together and the noise is gone.
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