Throbbing hum while cruising

Cadubya · 08-22-2022, 07:50 PM

I recently bought an 2011 135i manual 63k miles. When cruising on the highway, there’s a throbbing hum coming from the engine/floor boards. No throttle surging. It doesn’t come through the steering wheel either. Anyone have experienced this?

ShocknAwe · 08-22-2022, 07:53 PM

Really hard to help based on this alone. Is the car stock?

Cadubya · 08-22-2022, 07:56 PM

Stage 2 Dinan tune. Upgraded metal charge pipe. Berk rear muffler. That’s it that I know of.

bnace10 · 08-23-2022, 07:35 AM

Are you positive it's engine related? That sounds like a bad wheel bearing.

tracer bullet · 08-23-2022, 08:14 AM

Quote:

Originally Posted by bnace10

Are you positive it's engine related? That sounds like a bad wheel bearing.

My first thought as well. Reasonably common and definitely that description.

iminhell1 · 08-23-2022, 11:57 AM

Don't rule out driveshaft, center bearing, guibo, etc.

Cadubya · 08-24-2022, 12:47 PM

Quote:

Originally Posted by iminhell1

Don't rule out driveshaft, center bearing, guibo, etc.

Thanks for all the suggestions. Will investigate.

________ · 08-29-2022, 08:09 PM

Berks are crap and will rust out on the flange. Did you check to see if your exhaust is still one piece at the flange with the mid pipes (you can spot it from the rear, under the car).

Cadubya · 08-29-2022, 08:51 PM

Quote:

Originally Posted by Onesie

Berks are crap and will rust out on the flange. Did you check to see if your exhaust is still one piece at the flange with the mid pipes (you can spot it from the rear, under the car).

I'll check. I live in Texas though. Doubt it's rusted out.

08-22-2022, 07:50 PM	#1
Cadubya New Member 3 Rep 8 Posts Drives: 2011 135i MANual Join Date: Aug 2022 Location: Dallas, TX iTrader: (0)	Throbbing hum while cruising I recently bought an 2011 135i manual 63k miles. When cruising on the highway, there’s a throbbing hum coming from the engine/floor boards. No throttle surging. It doesn’t come through the steering wheel either. Anyone have experienced this?
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08-22-2022, 07:53 PM	#2
ShocknAwe 1Addict 3234 Rep 7,894 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Really hard to help based on this alone. Is the car stock? __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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08-22-2022, 07:56 PM	#3
Cadubya New Member 3 Rep 8 Posts Drives: 2011 135i MANual Join Date: Aug 2022 Location: Dallas, TX iTrader: (0)	Stage 2 Dinan tune. Upgraded metal charge pipe. Berk rear muffler. That’s it that I know of.
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08-23-2022, 07:35 AM	#4
bnace10 Second Lieutenant 145 Rep 219 Posts Drives: 2011 E82 135i DCT Lemans Blue Join Date: Jul 2020 Location: South Central PA iTrader: (0)	Are you positive it's engine related? That sounds like a bad wheel bearing.
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08-23-2022, 11:57 AM	#6
iminhell1 C2H5OH 3915 Rep 2,144 Posts Drives: 2010 SG 135i auto Join Date: May 2015 Location: Darwin, MN iTrader: (1)	Don't rule out driveshaft, center bearing, guibo, etc.
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08-29-2022, 08:09 PM	#8
________ ________ 4159 Rep 2,301 Posts Drives: ________ Join Date: Sep 2018 Location: ________ iTrader: (0)	Berks are crap and will rust out on the flange. Did you check to see if your exhaust is still one piece at the flange with the mid pipes (you can spot it from the rear, under the car).
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