Sound Insulating a Tahoe

[MikeCallery]

I have been looking at a variety of materials used to perform sound deadning on a vehicle. My thought is to insulate the hood of the truck and then pull up the seats and carpet and do that area so that when everything is rolled up and tightened up, I can have a nice quiet ride, when I want to.

Right now I'm planning on putting Scosche's Accuman absorbing material on the unerside of my hood. I'm going to look at the material which goes below the carpet.

Does anyone have recommendations on the best material for the job and a good source to save the $$

 

[WrenchGuy]

Raamat is the way to go for budget deadener. I demolished a lot of road noise.

I still have to do the roof when I get around to it.

 

[dye4metal]

i also second on the raamat. secondskin makes some great stuff too if budgets not a problem. but sound deadner really is the epitome of "you get what you pay for"

 

[MikeCallery]

Thanks for the advice so far!

As I price this stuff out, it's obvious I have to go in stages over time. I just don't have the bucks to do it at once.

I used accumat on the hood and picked up some permatex undercoating/sound deadening spray. After cleaning the bottom I worked the area were the muffer is located and I cannot believe the difference just that makes. It makes sense as the undercarriage is all metal and resonates like crazy but after letting it sit for 24 hrs I just took it out and even with the windows down, that one thing makes a boat load of difference!

I'll likely continue with the undercoating and will thicken it a bit and then start working on the inside back section first.

 

[JKmotorsports]

Another thing that helps roadnoise a lot is jute, the dense padding that goes underneath the carpet. Sound deadening material like accumat, dynamat, rammat, etc, helps with low frequency reverberation from large spans of body panels. Jute will help block out some of the slightly higher frequencies from noise. I layered my entire truck with Dynamat and a second layer of jute. I also filled certain voids in between body panels with expanding foam. Felt like a brand new truck when I finished. Here's a link to my thread for reference if your interested.

 

[oomindwarpoo]

I had dynamat, worked good but sorta pricey.

 

[MikeCallery]

Well, I'm definitely not up to pulling everything out of the Tahoe to sound insulate it. My objective is to quite down some of the resonance coming from the MagnoFlow's that I put on. I have 50SUV's on there and they are not overly loud, but I'd like to do a little.

I plan on doing the back cargo area with whatever I can find that is the least expensive option. This stuff is freakin pricey. Also going to pull the side panels in the cargo area and do them, possibly the back door, but stop there and see how it goes.

 

[MikeCallery]

JK...

You said you were using expanding foam between interior and exterior body panels. I'm curious what panels you are looking at? Obviously the doors are out so I can only guess the front quarter panels and the rear quarter panels and then the rear hatch?

I'm curious what type of foam you used and how you accessed these areas to make sure that you didn't a) over fill and pop something and b) completely fill the void?

Also, if you did the hatch in the rear, did the added weight cause you any problems with the lift mechanisms??

 

[JKmotorsports]

I filled in places like the kick panels, lower to mid sections of all the pillars, and most of the lower sections in the rear quarters. I taped up all the openings then filled up with the foam. I left some places open, like areas for access to door hinge bolts, etc. I just used the triple expanding stuff that you can get at places like Home Depot and Lowes. All I did to the rear hatch was apply a layer of Dynamat then used spray adhesive to attach another layer of jute on the back of the hatch trim panel. Not much added weight at all, so you don't have to worry about the struts failing.

 

[MikeCallery]

Thanks for the info. I'll have to add this to my list after I do my next round of accumat and when I pull out the rear cargo area for the overhaul!

 

[puckhead]

Hope this isnt too off topic but has anyone experimented with door seals or anything? I get some air noise when I am at highway speed and was wondering what, if anything, people have done. I thouht about trying that weather stripping that goes around house doors and I was trying to find something to cover the gap between the door and the truck when the door is closed. Thanks for any and all help!

 

[WrenchGuy]

Hope this isnt too off topic but has anyone experimented with door seals or anything? I get some air noise when I am at highway speed and was wondering what, if anything, people have done. I thouht about trying that weather stripping that goes around house doors and I was trying to find something to cover the gap between the door and the truck when the door is closed. Thanks for any and all help!

That is mainly one thing I have to deal with also.

As soon as I get it figured out I'm gonna post it.