popotla

Active Member
I’ve just finished fitting to my LR 110 CSW almost all the bits contained in the “Noisekiller” sound-dampening kit. As my expectation wasn’t high, I’m perhaps not too disappointed with the results. Suffice to say that the noise is far from “killed”.

My first question: as regards noise-dampening /”soundproofing”, is it a case of “the more the better” in terms of the depth of dampening material on any particular area? In other words, if I add more material on top of the Noisekiller sheets I’ve fitted, can I expect further improvement?

Second: most of the stuff Noisekiller supplied is 6-mm foam bounded on both sides by rubber app. 1.5 mm thick (total thickness 9mm). I don’t know whether this is high-, medium- or low-quality stuff in terms of its dampening abilities. (Maybe it’s very ordinary stuff sold at a high mark-up because it’s in “kit form”). To further improve sound-dampening, what kind of material should I look for? Please don’t suggest UK or other brand names or UK or other retail outlets as I’m not in the UK but in southern Oman and need to go hunting around looking at this or that kind of sheeting that building material suppliers or car accessory shops etc. might offer me. IS PLAIN THICK RUBBER SHEETING suitable, and if so what’s the maximum/minimum thickness to look for, or is foam bounded by rubber better (as per the Noisekiller stuff)?

Third: The Noisekiller kit contains pieces to be glued to or placed over parts of the seat boxes. Fitting the pieces on the front of the driver’s seat-box, under the vertical carpet covering appears to be not so easy, though possible (e.g. bolts retaining handbrake need undoing in order to release and lift carpeting). Does it make any difference in terms of effectiveness if the material is glued on the inside metal surface, i.e. inside the battery box, or must it be on the outside?

Fourth: Having heard that a lot of noise comes from/is reflected by a Defender’s roof, I was surprised to find that the kit contained nothing for the roof. Perhaps this is to keep down its cost. What would be the best stuff to fit to the roof, and can those plastic retaining studs be got out without making a dog’s leg of things?

Fifth: The Noisekiller kit contains a piece about 42 x 33 cm, designed to fit to passenger-side bulkhead. In the case of my vehicle, that will entail removing the air-con unit in order to get to the bulkhead wall behind it. I’m thinking that that will be troublesome and not easy, and wonder if I should go to the trouble.

Sixth: The NK kit contains some “pads”, thin, rubbery and foil-backed, and approx. 25 x 17 cm in size, to be fixed to the inside of each of the five doors. Are these small pads somehow supposed to reduce vibration/noise passing through the door?

I’m sorry this post is so long, but having come this far in terms of effort, time and cost, I feel I must do the job properly. Thus would much appreciate your advice regarding each of my points.

 
I used product called "StP Bimast BOMB" for sound-dampening. I highly recommend it!
You have to look for the closest seller in Google.
 
Did you use both lead lined engine and transmission blankets? I also have this kit as well as a Disco transfer box. I can sit on a Motorway at 70mph and the noise is remarkably reduced (after 300 miles or so I do end up with a bit of a headache, at 60 no problems at all). At lower speeds it is very quiet, considering. I am guessing that the purpose of the material is to dampen the sound rattling off surfaces. The roof lining should do this.
 
Hi Jai,

I’ve just finished fitting to my LR 110 CSW almost all the bits contained in the “Noisekiller” sound-dampening kit.

The Noisekiller kit contains a piece about 42 x 33 cm, designed to fit to passenger-side bulkhead (not fitted)

The NK kit contains some “pads”, thin, rubbery and foil-backed, and approx. 25 x 17 cm in size, to be fixed to the inside of each of the five doors. (not fitted)

Hope that answers your question.
 
Hi Rowley,

I don't have lead-lined engine and transmission blankets and don't know where I could get them.
 
Steve from noisekiller has told me that the stuff they use is ONLY available to them and only they can get the material they make their kits from from.

But you get it here: Acoustic foam, acoustic foams<title> <meta name="description" content="Acoustic foam for enclosures, sound absorbing foam to reduce reverberation, non-flammable acoustic foam, self-adhesive acoustic foam, acoustic foams for lining machine guards"/> <

I called him up asked him for samples, he sent me 3 I think. I then armed with the details traced that stuff down. IT IS THE SAME. So a few sheets of that, and make up your own kit, also they sell the 12mm & 25mm stuff too.

The best way is to use it is with jointing tape

Jointing Tape - Sound Service (Oxford) Ltd

You can make it all up and then join it all, then put in a water proof membrane then carpet it, I like the BMW carpet found here:

All Wheel Trim Ltd. trim material page
 
Hi Popotla,
I have the NK kit fitted to my 2002 90 TD5 CSW. The sound reduction is dramatic BUT...

Nearly all the noise is coming up throgh the floor and the bulkhead both in above and below the bonnet line. I had some spare pieces left (the thick self adhesive pieces) and fitted those round the bulkhead pedal box and made very sure to get as much as possible round the bellhousing etc.

I have not fitted the door pads as I don't suffer too much from tyre / traffic noise which is what these are for.

My TD5 has a panel under the engine which cuts out a lot of sound, it could be worth getting one of these, they really work. NK do a muffler blanket to go over the engine as this is the source of the noise. If I open the dash vents the noise level at least doubles at the moment.

My mate has the later Puma Defender with ar con. The carpets in his are thinner and the Ford engine is noisier than the TD5.

I can just say it's critical to fit these kits well, not leaving gaps if you can help it. The under seat box matting is important and on mine fitted like a glove without removing the hand brake at all.

By the way the materials used by NK were custom designed for the job of silencing commercial vehicles, I spoke to the owner Steve who came out to fit my mates kit. Nice bloke.
Cheers,

Hope this helps.
 
Hi Popotla,


By the way the materials used by NK were custom designed for the job of silencing commercial vehicles, I spoke to the owner Steve who came out to fit my mates kit. Nice bloke.
Cheers,

Hope this helps.

Steve tells everyone that - I know who his supplier is.
 
Popotla,
My NK kit came with two heavy (Think lead lined) shrouds/blankets. One lays over the engine, the other is wrapped around the bell housing. They must make a fifference. Don't know why your kit wouldn't have them.
Rowly
 

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