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mermoto

Member Since: 21 Sep 2011
Location: Essex
Posts: 326

Good idea or stupid - Sound proofing method

OK mateys what do you think.

Been thinking about the engine compartment sound proofing options and I know all about the lead blankets and adhesive pads etc but what about this?

As the inside of my bonnet is sprayed with Dinitrol, sticky pads would be a faf. So what if I was to remove the bonnet and fill it with expanding fire proof foam which when set firm could easily be trimmed around the edges for a neat smooth finish. I would guess it would have reasonable sound proofing qualities, be fire retardent and dead easy to do and because the Puma bonnet has lots of gaps it should hold in place regardless of the Dinitrol.

Any drawback? What am I missing?

http://www.uksealants.co.uk/product.asp?idproduct=201

Mermoto[/img]

22nd May 2012 9:48am

diesel_jim

Member Since: 13 Oct 2008
Location: hiding
Posts: 6092

Can't see why it shouldn't work

Remove the bonnet, lay it upside down and spray away. Once its set, like you say, a nice long blade to trim it down.

22nd May 2012 12:45pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

No Please!!!!

Low sound proofing capacity (too much lighter and closed cell) and it trap the water / humidity.................. Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

22nd May 2012 12:48pm

MartinK

Member Since: 02 Mar 2011
Location: Silverdale (Lancashire/Cumbria Border)
Posts: 2665

2011 Defender 110 Puma 2.4 USW Orkney Grey

dgardel wrote:
No Please!!!!

Low sound proofing capacity (too much lighter and closed cell) and it trap the water / humidity..................

DGARDEL - how are you getting on with the acoustic cover off the 2.2 installed on your 2.4 ??? Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's)

22nd May 2012 12:50pm

mermoto

Member Since: 21 Sep 2011
Location: Essex
Posts: 326

dgardel wrote:
No Please!!!!

Low sound proofing capacity (too much lighter and closed cell) and it trap the water / humidity..................

..but wouldn't expanding foam be closed cell so not able to absorb water?
..is humidity likely to occur under the bonnet, I realise that the engine can be very hot and outside at night the temperature can fall way below but I have never seen any condensation on the inside of the bonnet. Also with the foam in direct contact with the underside would that not prevent water droplets forming?

Just thoughts ???

Mermoto

22nd May 2012 12:54pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

mermoto wrote:
dgardel wrote:
No Please!!!!

Low sound proofing capacity (too much lighter and closed cell) and it trap the water / humidity..................

..but wouldn't expanding foam be closed cell so not able to absorb water?
..is humidity likely to occur under the bonnet, I realise that the engine can be very hot and outside at night the temperature can fall way below but I have never seen any condensation on the inside of the bonnet. Also with the foam in direct contact with the underside would that not prevent water droplets forming?

Just thoughts ???

Mermoto

Water can goes from metal surface and foam.... Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

22nd May 2012 1:07pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

MartinK wrote:
dgardel wrote:
No Please!!!!

Low sound proofing capacity (too much lighter and closed cell) and it trap the water / humidity..................

DGARDEL - how are you getting on with the acoustic cover off the 2.2 installed on your 2.4 ???

Not Yet

But I want to do during this weeks Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

22nd May 2012 1:07pm

Glynparry25

Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015

2009 Defender 110 Puma 2.4 XS DCPU Tonga Green

....... At a glimps I thought you were going to put the cup of foam in the 'Cup holder' on the engine, lol.

Glyn

22nd May 2012 1:13pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

I'd say that stuff is too light-weight to offer any significant sound proofing qualities. Vehicle sound proofing usually relies on density. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

22nd May 2012 1:22pm

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

2007 Defender 110 Puma 2.4 SW Chawton White

isn´t highly flamable? Puma 110" SW

.............................................................
Earth first. Other planets later

22nd May 2012 1:58pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

No, it's 'fire rated expanding foam'. Its' intended use is stopping of holes through fire rated walls, ceilings, etc. around services and the like in buildings. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

22nd May 2012 2:04pm

d j hutton

Member Since: 30 Jul 2009
Location: Dorset
Posts: 1044

Could be sprayed behind the dash to stop those pesky rattles

DJ 1989 200tdi 90 csw
2011 110 usw Orkney grey

Buy British 🇬🇧

Defender Clothing Designs available at http://www.rangesports.com/acatalog/Defender-Stuff.html

22nd May 2012 2:14pm

szracer

Member Since: 10 Oct 2010
Location: Cotswolds
Posts: 356

2010 Defender 110 Puma 2.4 USW Stornoway Grey

And imagine what fun you'd have afterwards when trying to find the cause of that 'random' short circuit.

d j hutton wrote:
Could be sprayed behind the dash to stop those pesky rattles

DJ

2010 110 XS USW (the slow one)
1960 Alfa Romeo Giulietta SZ (the fast one)
2005 Ducati ST3
1954 Sunbeam S8

22nd May 2012 2:57pm

ginjez

Member Since: 18 Sep 2011
Location: huddersfield
Posts: 1761

2011 Defender 90 Puma 2.4 ST Santorini Black

I did think about filling the chassis with expanding foam to stop water getting in and to prevent condensation

may even make it float

22nd May 2012 7:21pm

ickle

Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1780

2008 Defender 110 Puma 2.4 CSW Alpine White

It absorbs water, don't do it!

22nd May 2012 7:45pm

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