AWE Exhaust Rattle on Cold Start?

KevDon92 · 04-02-2018, 06:53 PM

I’ve had an AWE Touring with midpipe installed on my 435i for a few hundred miles now and this just started happening. I only hear it in cold starts for the first quarter mile or so...whenever I hit a bump, it sounds like something is rattling under the car. It stops doing it after the car is warmed up though.

bmwchue · 04-02-2018, 07:07 PM

Most likely hitting the heat shields. My muffler shop did a fuked up job so every time I dont let my car warm up or if I take a sharp right exhaust rattles and hit my heat shields. I can hear from the inside.Gonna take it to another shop.

KevDon92 · 04-02-2018, 08:34 PM

That’s what I was thinking, but I didn’t see why it went away when the car was warm.

KevDon92 · 04-03-2018, 10:05 AM

It sounds more like a ‘clunk’ rather than a rattle

mike@x-ph.com · 04-03-2018, 06:31 PM

Put the car on a lift and double check install

KevDon92 · 04-04-2018, 06:45 AM

Yeah that’s my plan when I find one available. I just thought it was strange how it occurs

04-02-2018, 06:53 PM	#1
KevDon92 Second Lieutenant 17 Rep 270 Posts Drives: 2014 435i Join Date: Sep 2017 Location: Philadelphia iTrader: (0)	AWE Exhaust Rattle on Cold Start? I’ve had an AWE Touring with midpipe installed on my 435i for a few hundred miles now and this just started happening. I only hear it in cold starts for the first quarter mile or so...whenever I hit a bump, it sounds like something is rattling under the car. It stops doing it after the car is warmed up though.
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04-02-2018, 07:07 PM	#2
bmwchue Captain 242 Rep 804 Posts Drives: 2013 bmw 328i Join Date: Oct 2017 Location: California iTrader: (0)	Most likely hitting the heat shields. My muffler shop did a fuked up job so every time I dont let my car warm up or if I take a sharp right exhaust rattles and hit my heat shields. I can hear from the inside.Gonna take it to another shop.
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04-02-2018, 08:34 PM	#3
KevDon92 Second Lieutenant 17 Rep 270 Posts Drives: 2014 435i Join Date: Sep 2017 Location: Philadelphia iTrader: (0)	That’s what I was thinking, but I didn’t see why it went away when the car was warm.
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04-03-2018, 10:05 AM	#4
KevDon92 Second Lieutenant 17 Rep 270 Posts Drives: 2014 435i Join Date: Sep 2017 Location: Philadelphia iTrader: (0)	It sounds more like a ‘clunk’ rather than a rattle
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04-03-2018, 06:31 PM	#5
mike@x-ph.com BimmerPost Supporting Vendor 24178 Rep 190,767 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Put the car on a lift and double check install __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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04-04-2018, 06:45 AM	#6
KevDon92 Second Lieutenant 17 Rep 270 Posts Drives: 2014 435i Join Date: Sep 2017 Location: Philadelphia iTrader: (0)	Yeah that’s my plan when I find one available. I just thought it was strange how it occurs
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