Engine Compartment Soundproofing
 

I ripped the old soundproofing out today as it had all come away from the firewall and all the foam has just disentigrated and I can see it is going to be a major just getting all the crap out of the engine bay.
Not sure whether to just leave it off or put a new one in.

Has anyone replaced one with the engine in on a 3.2 carrera?

Should I just clean up and leave off (heat issues in cabin?)

Solvent to remove glue residue?

Maybe cover everything up and use a spray can to paint as best I can

just after opinions really

cheers Paul

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yeah, definitely a messy job, I did a partial drop and replaced mine after leaving it off for over 2 years, it sure was loud, could hardly hear my wifey, now evrything is nice ane quite :D

Like Draco say's do a partial engine drop (look in the tech section for the article) scrape off as much as you can don't worry about the dry glue then install the pad dry get it in place (this takes some time) then glue it with spray 3m adhesive. Use the old style heavy pad only.

Old glue will melt into the new glue. Just knock off the high points and old foam.

It's a time soak job so mentally prepare.

As others have said you'll probably need to do a partial drop to be able to work in there although a fair bit of access can be gained just by removing the airbox and associated goods, right back to the throttle opening, and also the heater blower.

oh and I found the glue sets up a little quicker than I expected so be ready!

I will soon be dealing with this same issue. Planning to do it when I replace the clutch, which is 60k old. Good luck!

I just did mine with an awesome tip from the Pelicans. Get the new shiney sound pad and glue magnet on it and work it in that way. Cheap strong magnets (18 to 24 spaced evenly) at Lowes and some adhesive and you are good to go.

Regarding Glue
 

When I bought my pad from I think, App Biz, I was told to not bother with glueing it and I can say that its never moved in 3 years. It jams in so tight, glue seems unnecessary to me. I have the thick pad with the foil facing the engine, looks great and stays in place no issue. I had the motor out a the time and can't imagine doing the job without at least a partial drop.

Not my idea (and not a 3.2), but my engine:

http://forums.pelicanparts.com/uploa...1362434909.jpg

I agree that the new mat sit just fine in there without any glue but in case vibration and heat change that I fashioned 2 strips of aluminum to go from clip to the cross member as a bent press fit.

No claim as to performance, my car came to me with a mat falling onto the motor which I promptly vacuumed off and ran like that till mid-last year when I took the motor out to rebuild it.

I did this a year of so ago on an '84. Just remove the air box assembly and the blower motor. Dry fit the thing around the cruise unit. Then work from one side to the next - peel back and glue in 8-10 inch sections at a time. Don't worry too much about getting the glue down low - the shape of the thing holds that area in place. Concentrate on the top and ends. It's kind of a back crunching, pita job, but you certainly don't need to do an engine drop to get a good looking result that stays put. Whole thing took about an hour and a half as I recall, and I'm not a fast worker. Wear a respirator - fumes are wicked.

Do not waste your time and energy, buy a mat, glue magnets on the back and stick it in place. I did it to my car 1.5 years ago, you can not tell the difference if it was glued in and it took 30 minutes from start to finish.

Here's the link to the post I put on the Board after I replaced mine. There's a few of them on here, as many have done it in a variety of ways. It's not that difficult, and is well worth the effort in my opinion. For what it's worth, if you've got the fists and forearms of Popeye the Sailor, you'll have some skin in game, if you catch my meaning...

http://forums.pelicanparts.com/porsche-911-technical-forum/686604-installed-new-pp-sound-mat.html

As mentioned above I am in the no glue camp.

Just fit the sound mat and you are good to go. My has been in since last year and hasn't moved at all.

I did mine with the engine out. As suggested you would at least want to do a partial drop.

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Thanks for the replies guys
The next question is which of the 2 mats that pelican sell to use, either the origional heavier type or the type used in the later cars
You would think that the later version should be better

Eh... what sound mat. That's how I feel about it. Ran without mine all last year. I didn't feel that the cabin area was unnecessarily loud, I didn't even have to turn my music up loud to hear it.

I would recommend the "Ultimate sound pad" from Appbiz that our host sells.
It has a heavy foil layer, bonded to a thick felt layer, and a black foam "skinned" layer
which looks like stock. It is a little bit pricey, but it's excellent! Give your baby a treat!
Installed on on my car and couldn't be more pleased! The pic below shows the foil "out facing" but that is the double sided foil part. The Ultimate installs black side out. I used to only hear "engine sounds", but now just mostly transaxle whine.

Pelican Parts - Product Information: PEL-APBZ-ESPULT-B

http://www.pelicanparts.com/cgi-bin/ksearch/PEL_search.cgi?command=show_part_page&please_wait= N&make=POR&model=911E&section=MISCLL&page=15&bookm ark=70&part_number=PEL-APBZ-ESPULT-B

+1

I can say, my car has the sound proofing removed in the interior. Last summer, when the engine was out, I stripped my engine compartment with plans to not use a sound pad. I wasn't very happy with how the fire wall looked when bare and painted, so I installed one of Appbiz' pads. I couldn't believe how much quieter my car was to drive. I can drive long distances and carry a conversation without yelling now.

Will Hung, which model pad did you use and which side face out thanks!