Foam behind engine

GS235XI · 08-29-2018, 07:04 PM

Hi guys,

I don't have any issues with it, but what is the foam behind and under the engine cover for?
Has anyone removed this to increase engine noise to the cabin?

maccsco · 08-30-2018, 10:35 AM

I am not sure exactly what parts you mean, but if your talking about the cover on the underside of the hood I would not remove it. It is there I would assume for many purposes. I know of people removing it for weight reduction on other cars and the paint on the hood had issues as it kept some of the heat from the engine off the hood and paint.

SteveInfante · 08-30-2018, 11:10 AM

Quote:

Originally Posted by maccsco

I am not sure exactly what parts you mean, but if your talking about the cover on the underside of the hood I would not remove it. It is there I would assume for many purposes. I know of people removing it for weight reduction on other cars and the paint on the hood had issues as it kept some of the heat from the engine off the hood and paint.

Probably this. Hey maccsco where in the Carolinas are you located? I'm in Cola, SC

hwntime · 08-30-2018, 11:12 AM

It serves two purposes; it's to deaden the in-cabin noise and it's also made of a fire retardant material to, well, help retard a fire.

aerostar · 08-30-2018, 11:41 AM

Quote:

Originally Posted by hwntime

It serves two purposes; it's to deaden the in-cabin noise and it's also made of a fire retardant material to, well, help retard a fire.

Honestly who cares about fire safety?

Fuck that. Shave it off and save the lbs for the sick track times, bro.

hwntime · 08-30-2018, 12:07 PM

Quote:

Originally Posted by aerostar

Honestly who cares about fire safety?

Fuck that. Shave it off and save the lbs for the sick track times, bro.

LMFAO a whole whopping 3-4lbs?! I think you're delirious! It won't even make a .01 second difference.

aozer · 08-30-2018, 01:18 PM

Quote:

Originally Posted by hwntime

LMFAO a whole whopping 3-4lbs?! I think you're delirious! It won't even make a .01 second difference.

.01 seconds matters when you live life a quarter mile at a time

hwntime · 08-30-2018, 01:31 PM

Quote:

Originally Posted by aozer

.01 seconds matters when you live life a quarter mile at a time

Did you read what I wrote? I said it WON'T even make a .01 second difference. Just take a big dump before you run a quarter and it'd be the same thing LOL You should remove yours too and do a few runs and let us know how much you didn't shave off the 1/4 SMH

TajoMan · 08-30-2018, 03:52 PM

Quote:

Originally Posted by aerostar

Honestly who cares about fire safety?

Fuck that. Shave it off and save the lbs for the sick track times, bro.

I thought this was sarcastic joke.

That insulation on firewall is probably one of the last to remove for weight saving.

B58 engine has timing chain in back of the engine.
So BMW wants to add extra sound deadening material on firewall to reduce engine noise.

Edit: I noticed the OP has M235. Never mind. It must be just a normal insulation.

aozer · 08-30-2018, 03:53 PM

Quote:

Originally Posted by hwntime

Did you read what I wrote? I said it WON'T even make a .01 second difference. Just take a big dump before you run a quarter and it'd be the same thing LOL You should remove yours too and do a few runs and let us know how much you didn't shave off the 1/4 SMH

<------- joke

x <--------your head

maccsco · 08-30-2018, 09:14 PM

Quote:

Originally Posted by SteveInfante

Probably this. Hey maccsco where in the Carolinas are you located? I'm in Cola, SC

I am just outside Charlotte

M235ForNow · 08-31-2018, 09:08 AM

Quote:

Originally Posted by hwntime

Did you read what I wrote? I said it WON'T even make a .01 second difference. Just take a big dump before you run a quarter and it'd be the same thing LOL You should remove yours too and do a few runs and let us know how much you didn't shave off the 1/4 SMH

He pretty clearly wrote his comment tongue in cheek. Yet more evidence that light hearted comments should always include a ;-) just to make it clear to all. ;-)

Xi-Xi · 08-31-2018, 09:50 AM

Quote:

Originally Posted by aozer

<------- joke

x <--------your head

Brilliant!
I'm going to steal this.

XutvJet · 08-31-2018, 07:26 PM

Quote:

Originally Posted by GS235XI

Hi guys,

I don't have any issues with it, but what is the foam behind and under the engine cover for?
Has anyone removed this to increase engine noise to the cabin?

The heavy foam insulated engine cover and the foam on the top backside of the motor serves two purposes.

1) The reduction of direct injector and engine noise.

2) To retain heat to assist with quicker cold engine warm up.

The downside to this insulation is that it keeps things on top of the motor screaming hot including all the wiring. For the long term, especially given that this is a German car, that's scary.

The M3/M4 S55 motor has a tiny engine cover that only covers the front half of the valve cover. The M2/M3/M4 also don't use the insulating panel on the hood. Point in, the hood paint can handle the heat.

I'm not running the engine cover or hood insulation because I like the look of the naked N55, I like hearing more of the N55 scream (no difference in the cabin at lighter loads or idle), and I like that I've got nothing obstructing my view of the motor when inspecting it, which I do monthly or more.

I'm currently in the process of modifying a plastic valve cover from a later 1990s 540 to cover the wiring harnesses to the front four coil packs. I hope to be done this weekend with the project. It's looking pretty sweet.

Ron Jeffries · 08-31-2018, 07:46 PM

Pics of your engine when done, please, xutvjet

XutvJet · 08-31-2018, 10:16 PM

Quote:

Originally Posted by Ron Jeffries

Pics of your engine when done, please, xutvjet

Sure thing.

XutvJet · 09-07-2018, 02:42 PM

Quote:

Originally Posted by Ron Jeffries

Pics of your engine when done, please, xutvjet

Done.

https://www.2addicts.com/forums/show...7#post23694487

Rosseau · 09-09-2018, 07:43 AM

I can't imagine what a new B58 looks like naked

I got a look at the 2018 M5 4.4-liter at the dealer, as many of you probably have. You couldn't cram a notebook in there. Enough worry that repair on the B58 VANOS would require an engine-pull. I just keep my fingers crossed.

XutvJet · 09-10-2018, 07:01 PM

Yeah, that motor is hilarious in terms of access. The B58 is pretty bad as well in the 2 series. All the air to water intercooling parts consume a lot of space.

jmwilson125 · 09-11-2018, 03:55 PM

Quote:

Originally Posted by aozer

.01 seconds matters when you live life a quarter mile at a time

I used to drag here back in high school. That railroad crossing up there is exactly a quarter-mile away from here. On green, I'm going for it.

08-29-2018, 07:04 PM	#1
GS235XI Enlisted Member 6 Rep 34 Posts Drives: GS BMW M235XI Join Date: Jul 2018 Location: Grand Rapids, MI iTrader: (0)	Foam behind engine - purpose? Hi guys, I don't have any issues with it, but what is the foam behind and under the engine cover for? Has anyone removed this to increase engine noise to the cabin?
	Appreciate 0 Tweet Quote

08-30-2018, 10:35 AM	#2
maccsco New Member 18 Rep 21 Posts Drives: 2016 M235i Join Date: Aug 2018 Location: The Carolinas iTrader: (0)	I am not sure exactly what parts you mean, but if your talking about the cover on the underside of the hood I would not remove it. It is there I would assume for many purposes. I know of people removing it for weight reduction on other cars and the paint on the hood had issues as it kept some of the heat from the engine off the hood and paint.
	Appreciate 0 Quote

08-30-2018, 11:12 AM	#4
hwntime Captain 270 Rep 823 Posts Drives: F22 Raptor Join Date: Jun 2018 Location: PNW iTrader: (0)	It serves two purposes; it's to deaden the in-cabin noise and it's also made of a fire retardant material to, well, help retard a fire.
	Appreciate 0 Quote

08-31-2018, 07:46 PM	#15
Ron Jeffries Old Member. Old in general, actually. 386 Rep 889 Posts Drives: 2018 M240i xDrive convertible Join Date: Feb 2013 Location: Michigan iTrader: (0)	Pics of your engine when done, please, xutvjet
	Appreciate 0 Quote

09-09-2018, 07:43 AM	#18
Rosseau Private 25 Rep 78 Posts Drives: 2019 M240i xdrive Join Date: Sep 2018 Location: Cleveland OH iTrader: (0)	I can't imagine what a new B58 looks like naked I got a look at the 2018 M5 4.4-liter at the dealer, as many of you probably have. You couldn't cram a notebook in there. Enough worry that repair on the B58 VANOS would require an engine-pull. I just keep my fingers crossed.
	Appreciate 0 Quote

09-10-2018, 07:01 PM	#19
XutvJet Major General 5531 Rep 5,361 Posts Drives: 2011 Cayman Base, 2016 M235 Join Date: Mar 2016 Location: Kansas City iTrader: (-1)	Yeah, that motor is hilarious in terms of access. The B58 is pretty bad as well in the 2 series. All the air to water intercooling parts consume a lot of space.
	Appreciate 0 Quote

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search