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post #1 of (permalink) Old 07-24-2002, 06:11 PM
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Insulating a hard-top TJ for road noise?


Has anyone successfully insulated their hardtop TJ for road noise? I'm ok with it but it drives my wife a bit batty, esp. when we're on long road trips. What did you insulate? I've heard the hood is a primary culprit which surprised me because I thought it might be the hard top....maybe it's both. If you were successful, what resources did you use?
Thanks!
Matthew
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post #2 of (permalink) Old 07-25-2002, 06:14 AM
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Re: Insulating a hard-top TJ for road noise?

Borrow a buddy's soft top CJ and take her for a ride. After ten minutes on the highway she'll be very happy to get back in the TJ. [img]images/icons/smile.gif[/img]

Or experiment. Carpet is a very good sound deadener for places where water isn't present, and old fashioned undercoat is moderately good if water is a problem. Glue some pieces of carpet where you think it might help. If it does, pull the carpet and spray on some undercoat.

There is a foam material called Sonex that is designed for sound deadening. It's used in sound studios and TV sets. We lined the walls in a room full of computer hardware and dropped the noise level dramatically. It looks a little like an egg carton, but it's very sophisticated stuff. Also pricey, but gluing a panel in as a headliner will soak up a lot of the mid- and upper-frequency noise.
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post #3 of (permalink) Old 07-25-2002, 06:52 AM
 
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Re: Insulating a hard-top TJ for road noise?

If space is a concern, you can use Dynamat. Stereo guys use it for sound deadening. It is about 1/4" thick black/brown mat. Very heavy stuff, but it works pretty well for the thickness.

You can get it at stereo places like Crutchfield, etc.

My guess is that the suggestion about cheap/free carpet would at least help to identify your problem and tell you where it needs to go. Nothing like a little red velour shag on the roof for some class, though.

You might also want to consider an insulator for the firewall and wheel wells too. Lots and lots of noise comes in through there.

Best regards

John
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post #4 of (permalink) Old 07-25-2002, 11:13 AM
 
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Re: Insulating a hard-top TJ for road noise?

<blockquote><font class="small">In reply to:</font><hr>

Nothing like a little red velour shag on the roof for some class, though.

<hr></blockquote>

rotflmao - I just pictured my TJ with Red Velour Shag on the roof.

In response to the original post - the road noise in the TJ with the hard top isn't that bad. Try it with the soft top on and the windows rolled down on a hot day - can we say flap flap flap!!

Carpet might be the answer though

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post #5 of (permalink) Old 07-25-2002, 12:40 PM
 
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Re: Insulating a hard-top TJ for road noise?

There was a site that sold custom made glue-in headliners for hardtops, but I can't find the link for the life of me. I may have it on my home computer. If so, I'll post tonite with it.
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post #6 of (permalink) Old 07-25-2002, 03:49 PM
 
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Re: Insulating a hard-top TJ for road noise?

As promised, check out the hard top liner at http://www.californiatops.com/productframeie.html
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post #7 of (permalink) Old 07-25-2002, 04:31 PM
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Re: Insulating a hard-top TJ for road noise?

Rhino line the tub on the inside and underneath. Rhino line the top and inside of the doors. Lay down jute padding under the carpet. Use the hard top liner mentioned in the previous post. Use Dynamat heat shield under the hood. That is about all you can do to cut down on vibration, road, and motor noise. I say Rhino lining because it is supposed to suppress sound better than the DIY liners. You still will hear plenty of wind noise since jeeps aren't aerodynamic at all.
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