F53 doghouse foam

Another one to look at is www.dynamat.com/

I use this on our 99 and have not had any issues. I have headers also.

the foam should not stick to the plastic. Use to ship a lot of stuff and the new shipping foam is you put in a plastic bag, pour the foam in on top and then another plastic bag , lay in part cover with plastic bag and more foam. It was a rock solid packing box, and came apart to get the part out.

Usually products have an 800 number on the can. Call the number if one is listed and talk to the company about your idea....they can advise you of its safety, etc.. They may even have a product for high temperature applications.

There are many companies that make sound proofing for engine compartments and hot exhaust system. Some are produced for race cars.

LINK

gbopp wrote:
I have never tried it but, if I needed the foam replaced I would use Great Stuff.

And, I would use one of These Nozzles.

I was thinking of using those. Seems like great stuff foam would work fine. It doesn't burn and is waterproof. I'll just have to make sure there's clearance after it expands. Seems like it would deaden the sound nicely. Anything would be better than nothing and nothing is what's on half of it now. My plan "so far" is to put some old blankets over the engine to use as a temporary 1" spacer. Cover the blankets with plastic, then spray the foam on the underside of the doghouse, install it wet, then let it cure over night. I'd expect the plastic would keep the foam from sticking to my blankets. I'm only going to shoot for 1" of foam after it's dry. I don't think the foam would ever expand out to the plastic if I don't get to trigger happy that is.

I'm not "sold" on the idea yet. The exhaust manifolds worry me. I'm not sure what temps the great stuff can withstand. Going down the road it will probably be fine but idling for long periods on hot days? Not so sure. That's why I posted my "hair brained" idea here. It's an RV forum, somebody will tell me I'm an FN idiot. LOL!

I have never tried it but, if I needed the foam replaced I would use Great Stuff.

And, I would use one of These Nozzles.