Insulation between engine bay and luggage boot

Hi,

The foam like insulation between the engine bay and luggage boot (like sponge) has seen better days.

What would you guys suugest as a replacement?

Regards,
Stephen

 

In my car there was this foam between the engine comp and the passegers comp. I ended up removing it and replaced it my a nice sheet af aluminium.
The wall you revering to did not have any foam but alu sheeting only

 

Stephen,

Are you talking about a foam piece under the carpet in the boot? On my 308 and in the 328 I have now, there was no foam to speak of that I recall. If you want some insulation, there are some aluminum foil faced fiber insulations available that you could put under the carpet. I would suggest both the wall between the engine and boot, as well as the floor of the boot. I think most of the heat comes up from the exhaust, not really through that wall. But if you insulate both, it should help to control the heat somewhat.

You can find a bunch of sources by simply Googling "auto firewall insulation" or going to JCWhitney.com (or any of the other general auto parts suppliers for that matter). And if you really want hi-tech insulation, check out Koolmat. I've used it in the passenger compartment in old Jaguar XKEs that can roast you to death in the middle of winter, and it works great, but it is very expensive compared to the foil stuff. But it really works.

 

Have the same problem as the OP & am researching materials at the moment. You can do the foam at the rear of the engine bay with the engine in situ but I need to do the front as well so looks like the engine is coming out this winter. Will be doing a bunch of other jobs too but this is the one that's triggered the engine pull. If (when) I find something suitable I'll let you know.

There is a thread in the Dino forum where someone used some material they got from McMaster Carr but I think it would cost too much too bring that in.

I'm looking towards some of the materials used for sound absorbtion in the car audio world - I just don't want something that's foil faced because i think it would look terrible. Black or dark grey is what I'm after. The concern is to find something that will cope with the heat as much as anything else.

 

Dynamat is the audio blanket, and I use Armaflex as the original open cell foam dissolves....not sure what the top end of heat exposure is on that, might need a sheet metal protection...

 

Dynamat is sound deadening material. Its a very dense, quite thin & quite heavy Butyle mayerial. They have some other stuff called Dynaliner which is thicker foam based sound absorbtion (sadly its got "Dynaliner" stamped all over it so not really interested in it.)

Sound deadening kills resonance, sound absorbtion does as it says and "blocks" sound. I think its the latter that is needed with possibly a layer of the former underneath it.

The original foam material would have been intended for some sound absorbtion and some heat insulation (I think). It also seems to be backed with a layer of some kind of vinyl material which was maybe a crude form of sound deadening - I don't know.

I think I'd prefer to use a closed cell foam material to replace it because it won't absorb moisture (or anything else for that matter!)

 

Right, Armaflex is used on big chillers and HVAC equipment, it's a skinned closed cell sheet, various thicknesses....

I was on a job that used acres of it to wrapped chilled water lines below ground...for a few city blocks.

Not sure on how it'd hold up the real heat, like headers..

But I use it for hood strips and stuff like that.....

 

Thanks very much, I'll look into that. Since the engine will be out, one of the things I am considering doing is ceramic coating the headers to reduce the engine bay temperatures anyway.

 

Take a look at the first pictures here:
http://www.ferrarichat.com/forum/showthread.php?t=193134&page=13

I'm not sure it's called Armaflex, but it is the stuff used by the A/C guys. I've used it before on other cars with great success. On the 328 it even looks very similar to the original insulation! Besides providing excelent heat insulation, it doesn't burn!!
I believe they call it "Armstrong" around here, but I'm not sure.

 

i always thought that some sort of ceramic blanket such as "kaowool"
would be just the ticket. soft, pliable and able to withstand temps. above 1000deg.f.
not that your car would ever achieve those temps.

 

There are threads already on this subject. I can discuss this subject with you adnausium...the piece he is talking about isn't the stuff in the foreign thread (at least I don't think it is)...PM Me and we can talk on the phone.

MB

 

Thanks Rui, I'll look into that - is that material pliable/flexible? Do you know what its made of (i.e. is it closed or open cell foam or some kind of board?)

Would be grateful if you could point out where those threads are because I couldn't really find anything that discussed materials for this application.

What sort of material would you suggest that would do the job with reference to heat/fire/noise/robustness and appearance?

(And it is the stuff in Rui's thread that I am after as, I think, is the OP)

 

http://www.heatshieldproducts.com/index.php

 

Thanks for that. Can't see anything that jumps out as being the right thing to use though .

 

http://www.aircraftspruce.ca/menus/cs/insulation.html?UCOUNTRY=CAN

 

Is that stuff foil faced? Could you post a picture of it please?

 

I used lizard skin liquid It sprays on or apply with a drywall plastic four inch scrapper. Then when that dries add another layer. Then apply a heat shield. Some heat shields come with adhesive on the back or you can use your own non flammable glue and seal tape