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Author Topic: I made my car quieter  (Read 1835 times)

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Offline JoeBob

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I made my car quieter
« on: July 31, 2014, 09:56:14 PM »
I decided to try to make my car quieter. If you notice in the hatch back there is an access panel to replace the light bulbs on the marker lights. This gives you access to the hollow back fenders. These hollow fenders amplify road noise like a drum. I decided to fill this area with expanding insulation foam. I removed the plastic panels then I took a paper cup, cut the bottom out. This will make a tunnel to the marker bulb, so the foam would not prevent access. I has been some years since I bought this foam. It does not expand to fill the void like it use to. One can would expand 2-3 times its size over a few minutes. I was unable to find any expanding foam. The stuff now stays the same size that you spray out. It would have taken 5 or 6 cans to do the job each side. So I filled the area with a combination packing peanuts and the foam to form a solid fill. Now my car is much quieter. I hope this works for you.
Bill
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Deuteronomy 7:9

Offline bbobcat75

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Re: I made my car quieter
« Reply #1 on: August 01, 2014, 07:11:21 AM »
the only thing I see that may cause a issue is that foam and peanuts are like a sponge and will hold - water/moister - i would have used a sheet dynomat for the noise  first personally.  just my 2 cents

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Offline Reeves1

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Re: I made my car quieter
« Reply #2 on: August 01, 2014, 07:48:20 AM »
I've seen that before .....and it causes rust through quickly.

Offline Pinto5.0

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Re: I made my car quieter
« Reply #3 on: August 01, 2014, 09:53:14 AM »
the only thing I see that may cause a issue is that foam and peanuts are like a sponge and will hold - water/moister - i would have used a sheet dynomat for the noise  first personally.  just my 2 cents

My thoughts exactly. You could also use a can of spray truck bedliner on the metal. A couple coats will deaden sound & protect bare steel. I do this inside my doors & under fenders too.
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Offline dianne

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Re: I made my car quieter
« Reply #4 on: August 01, 2014, 03:02:35 PM »
Just my 2 cents and recommendation . I would remove the panels and then take out that expanding foam before it gets wet and starts rusting. That is a great way to quite the car and then later get rear quarters to replace your rusted ones. Seen it on cars I looked at before, and it rusts it badly.

There are some inexpensive mats you can get (other than dyno mat or something).
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Offline russosborne

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Re: I made my car quieter
« Reply #5 on: August 01, 2014, 07:00:55 PM »
Is it the foam that gets wet, or is it that the foam just holds the water in place instead of letting it drain properly?
I am wondering becuase I have seen some foams that claim to be waterproof.
Just curious, no plans on using the stuff.
Thanks,
Russ
In Glendale, Arizona

RIP Casey, Mallory, Abby, and Sadie. We miss you.

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