I'm looking to reduce a bit of the noise from under the hood. Can I use raamat BXT or secondskin's Damplifier underneath the hood for this application. Also, is there anything else that I could use or should along with one of those products. This is for my GMC Sierra 04. Thanks guys!!

I don't think weighting down your hood would really keep any noise out of the cabin. Even if you used sound absorbing material instead of regular dampening it would mainly just reduce noise on the outside of the vehicle - I'm pretty sure your engine makes more noise than the wind passing across our aerodynamic hood. You'd want to throw it on your floor and against the are behind the dash/firewall to keep road noise outta the cabin I would think.

Disclaimer: I have no idea what I'm talking about.

Edited June 7, 200718 yr by soydeedo

You'd want to throw it on your floor and against the and behind the dash/firewall to keep road noise outta the cabin I would think.

Yes.

I'd put it inside the car, floor and firewall. unless the goal is to be quieter to others at stop lights.

Treating from inside the vehicle is going to be the most effective, but if you have done that and still want to reduce engine noise, adding some material to the hood can help. If your hood has a stock liner, about all you can do is pull it off, add some vibration damper to the sheet metal and put the shield back on. No idea how much improvement that will bring. If you're looking at raw sheet metal, vibration damper then a product like Second Skin's Motor Mat or Dynamic Control's Hoodliner can be very effective. Engine noise comes through the hood and the windshield. Catching it at the hood can make a difference. While you're in the engine compartment, look at the firewall to see if it might benefit from some work - very vehicle dependent, I've actually got sound deadening in the fenders

Treating from inside the vehicle is going to be the most effective, but if you have done that and still want to reduce engine noise, adding some material to the hood can help. If your hood has a stock liner, about all you can do is pull it off, add some vibration damper to the sheet metal and put the shield back on. No idea how much improvement that will bring. If you're looking at raw sheet metal, vibration damper then a product like Second Skin's Motor Mat or Dynamic Control's Hoodliner can be very effective. Engine noise comes through the hood and the windshield. Catching it at the hood can make a difference. While you're in the engine compartment, look at the firewall to see if it might benefit from some work - very vehicle dependent, I've actually got sound deadening in the fenders

I put some deadener in my mustangs wells because of road noise more than anything else. It really helped a lot. But I covered that whole thing in 3 layers-just looking for more spots to put deadener

I'm looking to reduce a bit of the noise from under the hood. Can I use raamat BXT or secondskin's Damplifier underneath the hood for this application. Also, is there anything else that I could use or should along with one of those products. This is for my GMC Sierra 04. Thanks guys!!

What noise are you trying to be rid of? My Chevy has mostly wind noise from the stupid crap GM window seals.

Have you done your firewall? Have you used any acoustic fabric like Ensolite in the truck?

are you trying to reduce engine noises you hear from the outside ?

there is something you can do to the hood.

european diesels have some sort of textile material on the inside of the hood to prevent noise. i haven't seen that on their petrol counterparts.

best pic i could take of the said material (it's the dub. i have similar stuff on the cherokee)

Noise to get rid of: It's mostly exhaust noise and also my new electric fans. I have a aftermarket cat back system with a Flowmaster muffler. I have deadened the truck with two layers of fatmat in the doors with ensolite and one layer of deadening on the floorboard for the most part ( a few parts have a second layer but not much). As far as my firewall not so much. This will have to be the place to fill. I will try that first. I was also thinking of replacing the padding on the floorboard with aftermarket jute or Thermozite. This stuff looks much better than the factory jute. http://www.yourautotrim.com/carpetpadding.html. Maybe a layer of ensolite on top of that may help also.