Trunk overheating from muffler (how to insulate)

methkingM2C · 10-11-2021, 10:42 AM

Hey so my muffler is heating my chassis in the trunk and I would like to insulate or prevent this heating.

Any pointers to keep the chassis and trunk cooler?

Reason: meth pump is in the trunk chassis bay by the battery, and it does get pretty hot!

mapster37 · 10-11-2021, 11:16 AM

maybe try Dynamat

methkingM2C · 10-11-2021, 11:23 AM

Quote:

Originally Posted by mapster37

maybe try Dynamat

Thanks for recommendation. Seems like it's more for sound deadening tho than high heat

mapster37 · 10-11-2021, 02:02 PM

they have a product called Dynaliner that should do the job youre looking for

slaughter.mode · 10-11-2021, 08:42 PM

I never seen this as an issue before and I've seen a lot of meth kits in F8X trunks. Maybe the best way to handle this is from the outside instead so you can let airflow while driving do some of the work. High temp heat wrap the pipes from the muffler and maybe lining the top of it with something like this that you can't see? I've used this type of self-adhesive reflective shield stuff on other applications and it works well.

methkingM2C · 10-11-2021, 10:21 PM

Quote:

Originally Posted by nv_f82

I never seen this as an issue before and I've seen a lot of meth kits in F8X trunks. Maybe the best way to handle this is from the outside instead so you can let airflow while driving do some of the work. High temp heat wrap the pipes from the muffler and maybe lining the top of it with something like this that you can't see? I've used this type of self-adhesive reflective shield stuff on other applications and it works well.

Yeah I mean it's nothing of great alarm but it does get pretty warm. Fine to touch but it's hot. The M2C rear box is huge and idk if it sits closer than the F8x

That was exactly my thought tho. Was thinking getting some solid spray adhesive too for this gold foil cuz I've dealt with the rolls before, they arnt that sticky. Place all on the frame and call if a day.

SflBimmer8484 · 10-12-2021, 10:38 AM

Wrap it with a heat blanket used for turbos and such.,

methkingM2C · 10-12-2021, 10:41 AM

Quote:

Originally Posted by Andrew@ActiveAutowerke

Wrap it with a heat blanket used for turbos and such.,

Wrap the muffler?

FaRKle! · 10-12-2021, 12:35 PM

I bought some thermal insulation to try in mine. At the track that compartment got so hot it triggered the thermal shutoff on my dashcam battery in there.

There's already a heat shield on the underside between the muffler and body so your options are to either insulate that compartment inside, or to try and put some coating on the muffler top to prevent heat going up that way.

TractionControlDelete · 10-12-2021, 01:09 PM

Quote:

Originally Posted by methkingM2C

Quote:

Originally Posted by Andrew@ActiveAutowerke

Wrap it with a heat blanket used for turbos and such.,

Wrap the muffler?

Thermo-tec will do the job. Wrap exhaust and floor of trunk

For trunk:
https://www.amazon.com/dp/B00029KC2K...th=1&psc=1

I like this one because it has the adhesive backing

For exhaust:
https://www.thermotec.com/product/ex...e-f-thermo-tec

Obviously, the brand is not important as long as it works but I've had good experiences with this one.

10-11-2021, 10:42 AM	#1
methkingM2C Private 88 Rep 94 Posts Drives: M2C Join Date: Sep 2021 Location: MIA iTrader: (0)	Trunk overheating from muffler (how to insulate) Hey so my muffler is heating my chassis in the trunk and I would like to insulate or prevent this heating. Any pointers to keep the chassis and trunk cooler? Reason: meth pump is in the trunk chassis bay by the battery, and it does get pretty hot! Attached Images
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10-11-2021, 11:16 AM	#2
mapster37 Captain 362 Rep 924 Posts Drives: F80 Join Date: Sep 2018 Location: Davie iTrader: (2)	maybe try Dynamat
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10-11-2021, 02:02 PM	#4
mapster37 Captain 362 Rep 924 Posts Drives: F80 Join Date: Sep 2018 Location: Davie iTrader: (2)	they have a product called Dynaliner that should do the job youre looking for
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10-11-2021, 08:42 PM	#5
slaughter.mode Major 881 Rep 1,044 Posts Drives: 2018 M4 Competition Join Date: Mar 2018 Location: Chino Hills, California iTrader: (0) Garage List 2018 BMW M4 ZCP [9.80]	I never seen this as an issue before and I've seen a lot of meth kits in F8X trunks. Maybe the best way to handle this is from the outside instead so you can let airflow while driving do some of the work. High temp heat wrap the pipes from the muffler and maybe lining the top of it with something like this that you can't see? I've used this type of self-adhesive reflective shield stuff on other applications and it works well.
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10-12-2021, 10:38 AM	#7
SflBimmer8484 Brigadier General 1469 Rep 3,157 Posts Drives: . Join Date: Dec 2011 Location: Florida iTrader: (5)	Wrap it with a heat blanket used for turbos and such.,
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10-12-2021, 12:35 PM	#9
FaRKle! Brigadier General 4016 Rep 3,539 Posts Drives: 328d Wagon, M2 Comp, i4 eD35 Join Date: Sep 2016 Location: Bay Area, CA iTrader: (4) Garage List 2023 BMW i4 eDrive 35 [0.00] 2017 BMW 328dx Wagon [0.00] 2021 BMW M2 Competi ... [0.00]	I bought some thermal insulation to try in mine. At the track that compartment got so hot it triggered the thermal shutoff on my dashcam battery in there. There's already a heat shield on the underside between the muffler and body so your options are to either insulate that compartment inside, or to try and put some coating on the muffler top to prevent heat going up that way. __________________ -328d Wagon Build Log (with helpful reference links) -My YouTube Channel for some of the best DIYs and in depth information Please don't PM me for suspension recommendations unless interested in paid private consultations.
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