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05-18-2011, 12:43 AM | #1 |
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Z4 Door Sound Insulation
Well this project isn't something I planned. The passenger door has had a very annoying rattle the past couple of weeks. The rattle was really apparent when the door was slammed shut. Over patch pavement the mystery rattle was driving me crazy.
So yesterday I went into the garage to get my iPod and slammed the door behind me. Something inside me snapped when I heard that annoying rattle again. I decided to do something. I looked online and could only come up with these directions by Ron Stygar. It was a little vauge on how to get the panel off so here some simple directions.
Since I had the door apart there were two things I wanted to investigate: 1) The door speaker, but I decided I didn't want to mess with it because I'd be tempted to drop cash on a new set of speakers (and I didn't want to get caught up with messing with driver's side). 2) Room for some DynaMat. I know with a rag top the ride will allways be noisy, but anything I can do to cut down on road noise is worth it. I had Dynamatted my Honda Civic and I had a whole box of it left. When I was fixing my broken dryer I decided to Dynamat my washer and dryer. It was a fun project, but I wished I had saved more Dynamat. http://www.bobistheoilguy.com/forums...86#Post1930086 So I only had a half sheet left for the Z4. I cut a 12x4 inch strip, which slid in nicely behind the grey moisture barrier. The airbag is held in place by three 10mm bolts. I was nervous about air bag lights so I didn't disconnect the airbag, I just let it dangle for a few minutes. The thick black goo that holds the barrier on is easily cut and then stuck back into place. I used a rubber roller to smooth the Dynamat to the door cavity. To put the door panel back on reconnect the switches, speakers and door handle. The panel jumps onto the metal clips with some taps with a closed fist. The plastic clips are a little more stubborn to get into the metal door. I replaced the tweeter and sat on the passenger seat. WOW! The door slams so much more solid. That damn rattle is gone, the door reverbs about 40% less when closing. I'd say road noise is about 5% improved, if I had more Dynamat it would improve a little, but I was limited to what I had on hand. Sorry for the pics, I didn't take any pics in order: Panel off shows the holes for plastic clips and metal clips at the top. Airbag off, and just the top right of the moisture barrier peeled back. This offered plenty of room to get into the hollow door and place some Dynamat. The bad clip that started it all. The 30min and $10 in Dynamat is well worth the time, even for coupes since it makes the doors sound so much better. I'm going to tackle the drivers side tomorrow. |
05-18-2011, 01:14 AM | #2 |
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Dynamat eh? Now I have another project!
Nice augmented instructions--good to know plugs are available at the local parts store too. |
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05-18-2011, 02:48 PM | #3 |
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i also did this when i replaced all my speakers but i took a different approach. i left that foam there because it acts as a moisture barrier aswell. i took the dynomat and applied 2 layers to the back side of the door panel itself. Using a heat gun and a roller it molded perfectly. much better than the 5%. doors are much heavier and solid with really great sound suppression.
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05-18-2011, 03:18 PM | #4 |
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Nice write up.
I've had this one on the back burner for a while. It made a huge difference in other cars that I've done.
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05-18-2011, 10:14 PM | #6 | |
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I don't thinnk that a couple of sheets of Dynamat will make much of a differrence. It weights 0.68lbs per square foot, figure 2sq feet per door, you're at less than 3 pounds.
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I do think that Dynamat is most effective when stuck to the metal door itself since thats what does most of the "clanging". I think the second layer on top of the first will be a diminished return. Perhaps the best way is one layer insde the door, the second on the panel? It will have to wait until I do my speaker upgrade. |
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05-20-2011, 03:19 PM | #7 |
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Did the dynamat today in the doors and wow!!! Now when I close my door it sounds like a solid vehicle. Not tinny and cheap likemit did before. Pretty easy to do as well. Thanks for the write up!!!!
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05-20-2011, 11:40 PM | #8 |
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Hmm... wonder what the airbag and stock insulation weighs....
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