Sound deadening a Defender

[Standard]

YouTube (https://youtu.be/4dJgb_qAx6Q)

[DiscoMick]

We put the Car Builders stuff in ours and it does help. Get the 4WD waterproof version so it doesn't get water logged and cause rust.

[VladTepes]

In due course I'll be getting the car builders kit as well - so easy given they have all the necessary stuff, measured for the Defender 90, 110 or 130 (whichever you have), video instructionms etc and its an Aussie Business.

Land Rover 110 Floor pan sound and insulation packs (https://www.carbuilders.com.au/Land-Rover-packs)

[W&KO]

We put the Car Builders stuff in ours and it does help. Get the 4WD waterproof version so it doesn't get water logged and cause rust.

Hi Mick

I notice you reference the 4WD Waterproof product, I don’t see it listed on car builder website. Just wondering if you are thinking of another product?

[DiscoMick]

No it was Car Builders. They had one described as 4WD because it was waterproof.
I just checked the website and they've changed the way its presented. I assume the 4 x 4 packs are waterproof, but maybe you could ring them and check.

[W&KO]

No it was Car Builders. They had one described as 4WD because it was waterproof.
I just checked the website and they've changed the way its presented. I assume the 4 x 4 packs are waterproof, but maybe you could ring them and check.

I read three posts where you have mentioned it...I assumed you were across it.

[DiscoMick]

That's how it was when I bought it a couple of years ago. I still have a box of it in the shed.
The website has changed, and now shows classes of vehicles, but I assume the 4WD and ute categories would use the waterproof version.
A call or email should confirm that.
https://uploads.tapatalk-cdn.com/20200405/59c71fffbbcfdf89c2dcefade02990b9.jpg

[Tombie]

Hi Mick

I notice you reference the 4WD Waterproof product, I don’t see it listed on car builder website. Just wondering if you are thinking of another product?

Their normal product - not the felt/foam one - is waterproof. [smilebigeye]

[W&KO]

That's how it was when I bought it a couple of years ago. I still have a box of it in the shed.
The website has changed, and now shows classes of vehicles, but I assume the 4WD and ute categories would use the waterproof version.
A call or email should confirm that.
https://uploads.tapatalk-cdn.com/20200405/59c71fffbbcfdf89c2dcefade02990b9.jpg

Hmm...carpet under lay is different to sound deadener, ya might want to clarify the product you refer to when posting.

Have it all sorted not

[DiscoMick]

Hmm...carpet under lay is different to sound deadener, ya might want to clarify the product you refer to when posting.

Have it all sorted notThis product is a sound deadener which is waterproof and is laid under carpet.

[ramblingboy42]

Hmm...carpet under lay is different to sound deadener, ya might want to clarify the product you refer to when posting.

Have it all sorted not

I can read what it says on the box.

[DieselDan]

YouTube (https://youtu.be/4dJgb_qAx6Q)


That wasn't too bad from a technical standpoint.
He's got the idea of the panel resonance right, but in my opinion he's still using way too much dynamat.
Dynamat and similar products are supposed to be damping pads, or a constrained layer damping, and the idea is to add just enough to stop the panel resonating.
By adding too much, you go past the point of damping the panel and just end up mass loading it. It still works, just adds unnecessary weight. And cost. Especially if you're then putting mass loaded vinyl over the top anyway.

I've been looking through the 'what are you doing in the lockdown' threads and maybe I should make use of the isolation time (and 20+ years as an NVH engineer in the auto industry) to do a write up on making a Deafener less deafening!

[Standard]

That wasn't too bad from a technical standpoint.
He's got the idea of the panel resonance right, but in my opinion he's still using way too much dynamat.
Dynamat and similar products are supposed to be damping pads, or a constrained layer damping, and the idea is to add just enough to stop the panel resonating.
By adding too much, you go past the point of damping the panel and just end up mass loading it. It still works, just adds unnecessary weight. And cost. Especially if you're then putting mass loaded vinyl over the top anyway.

I've been looking through the 'what are you doing in the lockdown' threads and maybe I should make use of the isolation time (and 20+ years as an NVH engineer in the auto industry) to do a write up on making a Deafener less deafening!I would be very interested in your input, as I'm sure many others would be as well.

[W&KO]

I can read what it says on the box.

I can read as well, across three threads Mick mentions make sure you get the water proof stuff however doesn’t clarify that he is talking about carpet underlay.

Most posts are about dedicated sound deadener that goes down first...well that’s the way I interpret the threads.

Interestingly car builders replied to my inquiry that they don’t recommend the water proof carpet underlay under vinyl type floor in defenders.

[DieselDan]

I would be very interested in your input, as I'm sure many others would be as well.


I've had a go. Hopefully it's not too dry and dull :zzz:

How to make a Defender Quieter (https://www.aulro.com/afvb/projects-and-tutorials/278232-how-make-defender-quieter.html)

[DiscoMick]

Looking at the Car Builders website, its certainly changed since I bought from them.
They just had a 4WD section then, with waterproof stuff, but now they have a specific Land Rover Defender pack, with several products for various parts of the vehicle.
One of the products appears to be the closed cell one I bought for the floor. I didn't bother with the roof or sides.
I still wouldn't want to put anything on the floor which could get soaked and sit there causing rust. Defenders are known for leaking and we do get water in the front passenger footwell occasionally.
The floor and firewall meet at the front of the front footwells and it is a known rust area.
Anyway, you must make your own decisions.

Land Rover 110 Floor pan sound and insulation packs (https://www.carbuilders.com.au/Land-Rover-packs)