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  #1  
Old May 1st, 2007, 01:10 PM
cdb
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Clark Bowen
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quieting a 300 TDi

Now that I have the 300 TDi installed I'm looking at ways to quiet the underhood noises down a bit. I couldn't find an existing thread on this and would like to hear any ideas and sources. Hopefully Stateside, in case you haven't seen the value of the British Pound these days.

Thanks,

Clark
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  #2  
Old May 1st, 2007, 01:58 PM
nas110_300tdi
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I am interested in this also. I remember seeing a pic of a 300TDI Defender with a factory-looking, fitted sound barrier on the underside of the bonnet. I wonder where one can source this from?

Also, I wonder if some Dynamat Extreme or Hoodliner would make any difference?
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  #3  
Old May 1st, 2007, 02:08 PM
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Jeff Sommer
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I think that under hood temps might be to much for the adhesive that holds dynamat or similar material to the bonnet. I think that I might install some on the inside of my bulkhead to help with the noise. Have you done anything with your doors also? I found that it helps with the noise all round as well.
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  #4  
Old May 1st, 2007, 02:16 PM
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mark kellgren
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I'm only a month or two away from buying a gallon of Second Skin Spectrum spray for the bulkhead and floors, and a gallon of Second Skin Firewall to apply to the engine side bulkhead, under the bonnet and under the floorboards and seat box. they can be painted on with a brush, layered until your happy, resists water/chemicals, and protect from corrosion. I'll report out when I complete. would love to hear if anyone has used those products. sound a helluva lot better than rhinolining.
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  #5  
Old May 1st, 2007, 08:16 PM
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David Marchand
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Some of us have done dynamat extreme with another layer of their hoodliner. Though I don't know how much it really quiets anything down. You'd have to do the entire cab including the bulkhead, floor boards, rear tub, roof. Having done it, I wouldn't bother. Just adds needless weight.

The only merit of doing the hoodliner in my opinion is cutting down on the griddle affect of the hood on warm days.

pic
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  #6  
Old May 1st, 2007, 11:22 PM
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Quote:
Originally Posted by cdb
Now that I have the 300 TDi installed I'm looking at ways to quiet the underhood noises down a bit. I couldn't find an existing thread on this and would like to hear any ideas and sources. Hopefully Stateside, in case you haven't seen the value of the British Pound these days.

Thanks,

Clark
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  #7  
Old May 2nd, 2007, 07:04 AM
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  #8  
Old May 2nd, 2007, 09:52 AM
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Pat
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RAAM Audio

I was pesonnaly looking to do something significant for a temperature barrier and sound deadenig. And after much thoughts and research, I ended up going with this company. I will be using the RAAM mat BXT overlayed with their Ensolite MLC in the entire cab section plus some marine engine compartment liner for the under hood. I have the entire truck in pieces right now so that makes it realy easy for me to sound deaden. Hopefuly it will make it more comfy for long trips, and make the cab nice and toasty from the Webasto heater next winter.

Nice link to check up :

http://www.sounddeadenershowdown.com/

My 0.2 cents

Pat
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  #9  
Old July 3rd, 2008, 07:32 PM
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Scott
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Quote:
Originally Posted by Retrofit
I was pesonnaly looking to do something significant for a temperature barrier and sound deadenig. And after much thoughts and research, I ended up going with this company. I will be using the RAAM mat BXT overlayed with their Ensolite MLC in the entire cab section plus some marine engine compartment liner for the under hood.
Pat
Pat, how did the RAAMmat work out?
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  #10  
Old July 3rd, 2008, 08:08 PM
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mark kellgren
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I have added SecondSkin to my seat box, floors and bulkhead, and I have 2 sheets of Luxury Liner pro (also Second Skin) that I'm going to add to my cabin bulkhead and front floors. I'll report on effect. Second Skin experts have stated that Luxury Liner will be the single most effective sound barrier for diesel noise. I'll report on effect once installed.
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  #11  
Old July 3rd, 2008, 08:45 PM
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Pat
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Well ...

I went the Second Skin Audio way, not much price difference when you think about how much it takes for a CrewCab in my case. So I got some Damplifier Pro and some Luxury Liner to do the top half of the bulkhead, top, back window frame, aft bulkhead and doors. The rest of the truck is getting Line-Xed.

It will be posted in my build post in the next week or two.

Pat
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