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Thread: Sound proofing in a defender... Good results

  1. 19th October 2008, 02:49 PM #1
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    Sound proofing in a defender... Good results

    For those interested in making their Defender just that little bit quieter, this is what I have done. I had already started to strip out the back of my 90 so that I could line the load area with Hippo-liner.

    Whilst doing that I decided to do something about sound proofing the Defender a little bit. I ended up using a little bit of left over Dynamat that I had lying around in few areas, transmission tunnel and some of the panels around the battery/ECU box. (I have previously used Dynamat on the doors with good success.)

    Although Dynamat is great for adding weight to thin panels and improving speaker enclosures, it's not really designed to block that much road noise IMHO…

    For blocking noise I used some dampening/barrier material that I picked up at Jaycar Electronics. I just used some spray on glue to stick it to some of the panels and under the rubber matting.







    I was pleasantly surprised by the end result. It has definitely reduced the amount of road and transmission noise coming in. It still isn’t as quiet as a Rangie, but it is a great improvement from what is was. It also makes the new speakers and CD player that I fitted sound that much nicer too.

    Cheers
    MOS
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  2. 19th October 2008, 03:40 PM #2
    aki Guest
    yep, I found the transmission tunnel makes a big difference, too. furthermore, I painted the wheel archs whith some sound deadener (bitumen/tar, 40$ to do the entire underbody ) and was quite pleased with the difference that made as well.
    now, I figure that the firewall would be the next thing to do. however, I am reluctant to paint it because of the fire hazard. and glueing a mat to the firewall seems rather complicated. so, has anybody an idea what to do about the firewall?
    cheers, axel
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  3. 19th October 2008, 06:40 PM #3
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    I hope you guys had the foresight to at least cover all the screw threads and fixings before you started spraying...

    In case you didnt please remind me that youve dont this prior to asking me to help out pulling things out....

    that spray glue and underbody is EVIL when it comes to spanners clagging on and drivers slipping out of fastners..
    Dave

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  4. 19th October 2008, 06:50 PM #4
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    Ha Ha.
    Yes. Remembered to cover, tape up or avoid any bolt holes, threads, screws and panels that may need to be accessed.

    I hope to avoid having to access said panels anytime soon… but it is a Land Rover.

    Cheers
    MOS
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  5. 19th October 2008, 11:11 PM #5
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    Thanks MOS. This is a project for me before next trip. I don't expect it will ever be as quiet as a tdci defender, but if I could just take the edge off the noise everyone would be happier.
     2005 Defender 110 
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  6. 20th October 2008, 03:28 PM #6
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    Quote Originally Posted by mos View Post
    For those interested in making their Defender just that little bit quieter, this is what I have done. I had already started to strip out the back of my 90 so that I could line the load area with Hippo-liner.

    Whilst doing that I decided to do something about sound proofing the Defender a little bit. I ended up using a little bit of left over Dynamat that I had lying around in few areas, transmission tunnel and some of the panels around the battery/ECU box. (I have previously used Dynamat on the doors with good success.)

    Although Dynamat is great for adding weight to thin panels and improving speaker enclosures, it's not really designed to block that much road noise IMHO…

    For blocking noise I used some dampening/barrier material that I picked up at Jaycar Electronics. I just used some spray on glue to stick it to some of the panels and under the rubber matting.




    I was pleasantly surprised by the end result. It has definitely reduced the amount of road and transmission noise coming in. It still isn’t as quiet as a Rangie, but it is a great improvement from what is was. It also makes the new speakers and CD player that I fitted sound that much nicer too.

    Cheers
    MOS
    ive stuck the same stuff to my roof panells. has made a good differance to heat also.

    cheers phil
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