Trunk Rattle

dodguy · 07-09-2007, 04:55 PM

Does anyone know how to make their trunk stop rattling after putting subs in the back? I think I've narrowed it down to the lid vibrating against the car itself and the key port in the back. I drive an 03 Jetta GLS if it matters. Thanks. Any help would be appreciated.

PS.
I've already put expanding foam in the trunk lid, along with carpet padding everywhere i can think of, and that didn't help at all. I've also line the inside lip of the trunk lid with a soft rubber weather stripping (not visible unless you open the trunk) which didn't help.

HELP ME PLEASE!!!!!

DarquePervert · 07-09-2007, 08:28 PM

Put some earplugs in, turn up the bass and find out what's rattling and seal it off somehow. It's really all you can do.

JimmyFitz · 07-09-2007, 11:50 PM

Check your license plate, too.

Cutrara · 07-10-2007, 12:06 AM

I've heard heard of some guy taking out all of the screws the hold the trunk plastics in and putting an o-ring on them and tightening them up.

monkeyracer · 07-10-2007, 12:38 AM

ok, it's most likely your plate, otherwise it could be something on the lid, the lid itself, both, tons of different things. you are starting right by trying to isolate it with the foam and the rubber strips. Your best bet is to do as DP suggested, get really good earplugs, crank it and listen to where things rattle. press on different parts of the trunk lid, etc.
You may never fully be able to stop it though. I've said in a previous thread about trunk rattle that 'why do you care if other people hear your trunk rattle?'

dodguy · 07-10-2007, 02:39 AM

wont the earplugs keep me from hearing the rattle?

DarquePervert · 07-10-2007, 07:47 AM

A rattle is metal vibrating against metal. You do't need to hear it so much as feel it. The pitch f the trunk rattle will be a far different frequency thn the subwoofer, so the rattle will be painfully obvious.
The earplugs are so that you don't go deaf crawling in your trunk with the subwoofer thumping away.

If you choose to dig into your trunk right next to a cranked up subwoofer without any hearing protection, go right ahead. don't say you weren't warned.

If uyou choose to eschew the earplugs, take photos of your ears after teh eardrums are blown out. Gory stuff like that is eerily cool.

durwood · 07-10-2007, 08:54 AM

as others have said, you have to identify the rattle first before you can try to get rid of it. Problem is that you can chase it away but it always ends up somewhere else. You are on the right track with different materials. It's probably going to to take a combo of deadening material, closed cell foam, and isolation to get things to stop rattling.

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