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Soundproofing the trunk/decklid emblem cap

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Old 5/24/11, 03:09 PM
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Question Soundproofing the trunk/decklid emblem cap

Just installed a sub/amp in the trunk and it sounds great. I need to eliminate the trunk rattles immediately though. The majority of the rattles are coming from the GT emblem on the trunk. Has anyone had any experience in removing it and adding some dynamat before reinstalling? Definitely open for suggestions as I'd rather not have to go with a CDC blackout panel. Any advice would be appreciated.
Old 5/24/11, 05:45 PM
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the trunk emblem is 3 pieces plastic riveted together and stuck on with 3M tape. if you take off the emblem, you can undo the rivets and use 3M tape all around to put everything back together. it won;t rattle then. you sure it's faux gas cap, though?
Old 5/24/11, 06:26 PM
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I would suspect more the cover over the trunk latch mechanisms than I would the cap, by far.
Old 5/24/11, 06:36 PM
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i put dynomat all over the trunk and it stopped every rattle
Old 5/24/11, 08:04 PM
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did you put some behind the emblem as well or did it not need it? I have enough dynamat to cover about half the trunk right now.

Originally Posted by Onelildude
i put dynomat all over the trunk and it stopped every rattle
Old 5/24/11, 11:18 PM
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The trunk was closed when I was listening so I will take a better look tomorrow. The rattles were coming primarily from that area though. I may not even have to dynamat the whole trunk, maybe just the lid itself. We shall see, thanks for the thoughts.

Originally Posted by houtex
I would suspect more the cover over the trunk latch mechanisms than I would the cap, by far.
Old 5/28/11, 10:45 AM
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Originally Posted by essque
Just installed a sub/amp in the trunk and it sounds great. Any advice would be appreciated.
I'd like to read/see more about your sub/amp install. Really curious.
Old 5/31/11, 10:36 PM
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Audiopipe 1500d and a TC Sounds 12" in a vented enclosure. I had two 10's in my last mustang but I wanted to get more bass with a lighter set-up which I achieved easily with this. It sounds so good that I'm tempted to go bass crazy and trade up to a 3000d amp while adding another 12". The bass would be deafening.

Right now the rattles are coming from the rear deck and the trunk lid apparently. We've had a lot of rain in Michigan lately so I haven't had time to fix it but I hope to this week. I have 4 sheets of dynamat, hoping that I don't have to buy more. Will post pics soon.
Old 5/31/11, 10:58 PM
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I got 10 kicker L3's with a 500w powering my whole system and I'm gettin crazy rattles from the trunk. I got an 02 and it sounds like it's all comin from the spoiler. Anyone got a 1999-2004 black v6 trunklid without a spoiler willing to trade???
Old 6/1/11, 05:47 AM
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I used spray foam on/in the trunk lid. Made a big difference with all the vibration. Its kinda hard to get dynamatt in the trunk lid.
Old 6/1/11, 08:30 AM
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what kind of foam did you use and where/how did you apply it?
Old 6/1/11, 06:57 PM
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There are several different manufactures of this stuff.
Old 6/1/11, 09:39 PM
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found this:

"Another alternative is insulating foams like Great Stuff©, which is used in home construction. Great Stuff© is cheap, fireproof when cured, and readily available at any hardware store for about three dollars a can. Great Stuff© is also shapeable when it cures, and can be used to smooth sharp corners. The downside to Great Stuff©, like Ice Guard, is that it is messy. Once Great Stuff© is sprayed on upholstery, your clothes, your skin, etc, it's all over. You hands will be stiff and sticky for days, if not weeks, and your clothes are forever ruined. Great Stuff© also expands voraciously, so spray it carefully"
Old 6/1/11, 09:47 PM
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Originally Posted by essque
found this:

"Another alternative is insulating foams like Great Stuff©, which is used in home construction. Great Stuff© is cheap, fireproof when cured, and readily available at any hardware store for about three dollars a can. Great Stuff© is also shapeable when it cures, and can be used to smooth sharp corners. The downside to Great Stuff©, like Ice Guard, is that it is messy. Once Great Stuff© is sprayed on upholstery, your clothes, your skin, etc, it's all over. You hands will be stiff and sticky for days, if not weeks, and your clothes are forever ruined. Great Stuff© also expands voraciously, so spray it carefully"
Thanks for posting this. Gonna save alot of ppl some major headaches
Old 6/2/11, 06:03 AM
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for sure ya have to be carefull with it. It expands quit a bit. I layed a blanket down over anything I didn't want that stuff on and was carefull not to spray to much in one area. Yo u may want to use some of that blue tape over areas you want to keep clean also

Last edited by Glenn; 6/2/11 at 06:11 AM.
Old 11/20/11, 10:35 AM
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another advantage spray foam has over dynomat is that it's far lighter.
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