Can a carbon fiber diffuser melt?

norbetow · 06-19-2022, 12:12 PM

So here is the skinny, yesterday I installed my new three piece BMW carbon fiber parts. However, I noticed the center potion that wraps under the car is touching the muffler.
Other then rub wear, is this a problem for a fire risk? Mufflers can get so hot that they melt plastics and carbon fiber composites.
I would assume no, but I would like to know what other people think since things like valve controllers, nearby wire harnesses, stock diffuser, etc. are all close together.

Jaronbwall · 06-20-2022, 10:57 AM

Carbon fiber cannot melt under those conditions. That's why you see in high temp places like heat shields, motorcycle mufflers, engine bay pieces, etc. I wouldn't want my exhaust touching anything. I'd check the hangers and try to align it better. That could start squeaking like crazy while driving.

Serf27 · 06-23-2022, 12:01 AM

It might turn yellow over time.

06-19-2022, 12:12 PM	#1
norbetow New Member 6 Rep 8 Posts Drives: E92 Join Date: Oct 2021 Location: Manassas iTrader: (0)	Can a carbon fiber diffuser melt? So here is the skinny, yesterday I installed my new three piece BMW carbon fiber parts. However, I noticed the center potion that wraps under the car is touching the muffler. Other then rub wear, is this a problem for a fire risk? Mufflers can get so hot that they melt plastics and carbon fiber composites. I would assume no, but I would like to know what other people think since things like valve controllers, nearby wire harnesses, stock diffuser, etc. are all close together. Last edited by norbetow; 06-20-2022 at 01:18 PM..
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06-20-2022, 10:57 AM	#2
Jaronbwall Driving cars and riding bikes really fast 285 Rep 1,002 Posts Drives: 2009 335i Join Date: Sep 2014 Location: Indianapolis iTrader: (0)	Carbon fiber cannot melt under those conditions. That's why you see in high temp places like heat shields, motorcycle mufflers, engine bay pieces, etc. I wouldn't want my exhaust touching anything. I'd check the hangers and try to align it better. That could start squeaking like crazy while driving. __________________ 335i, sport pkg, 3 pedals, Blacked out, LED markers, OZ Ultraleggera wheels, Firestone Indy 500s, x-pipe, vibrant 1792, PE mod MHD stage 2+, BMS DPs, ARM charge pipe, Tial BOV, ARM FMIC, dual cone, CSF radiator, M3 control arms, sways, HAWK pads. https://www.strava.com/athletes/8309149 Follow me on Strava
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06-23-2022, 12:01 AM	#3
Serf27 Brigadier General 2851 Rep 4,322 Posts Drives: 335i Join Date: Apr 2018 Location: Sitting in a BMW. iTrader: (-1)	It might turn yellow over time.
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