Under Bonnet Deadening/Insulation

Everything that doesn't belong in the previous categories probably belongs here. Interiour (how are the seats mounted? how to remove the CEM?) and exteriour (how to replace the popup-lights shock absorbers or a door) are discussed here!

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edie_fox
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Under Bonnet Deadening/Insulation

Post by edie_fox » Sat Mar 09, 2019 8:17 am

Hi
I need to replace this and was wondering if someone could maybe take a photo of theirs for reference and tell me the approximate depth of the original please.
Many thanks. :D
2019 - 1990 FOX 480B White Auto Turbo.
2016 -1990 G866 XPO 1.7 Light Blue ES
2008 - 1994 M314 NJA 2.0 Red ES
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MisterH
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Re: Under Bonnet Deadening/Insulation

Post by MisterH » Sat Mar 09, 2019 9:02 am

Image

I haven't measured exactly, but I would estimate that it was about 1.5 - 5cm thick, I already had the picture so I was not able to measure accurately, but I hope this helps you anyway though
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Re: Under Bonnet Deadening/Insulation

Post by dragonflyjewels » Sat Mar 09, 2019 9:51 am

I'm in the middle of a project to replace ours - I carefully peeled the 2 side pieces off and have cut paper templates for them. If you pm me your name & address I'l cut copies and post them to you. It should be 2cms thick. I haven't got as far as the centre one, still debating what to stick them on with, and whether to have the 'metal' side in contact with the bonnet (harder to stick shiny surfaces) or have it metal side showing and protecting the foam. Also unsure if it's sturdy enough to clip the wires onto - the originals had what felt like a sheet of very thin aluminium on the backs but it disintegrated so I can't re-use it. Anyone got any thoughts on that ?
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Re: Under Bonnet Deadening/Insulation

Post by edie_fox » Sat Mar 09, 2019 10:26 am

dragonflyjewels wrote:
Sat Mar 09, 2019 9:51 am
I'm in the middle of a project to replace ours - I carefully peeled the 2 side pieces off and have cut paper templates for them. If you pm me your name & address I'l cut copies and post them to you. It should be 2cms thick. I haven't got as far as the centre one, still debating what to stick them on with, and whether to have the 'metal' side in contact with the bonnet (harder to stick shiny surfaces) or have it metal side showing and protecting the foam. Also unsure if it's sturdy enough to clip the wires onto - the originals had what felt like a sheet of very thin aluminium on the backs but it disintegrated so I can't re-use it. Anyone got any thoughts on that ?
Thank you so much for the info, that's great. I'll get looking for some the right depth. It's had the whole lot removed so its clean metal under there at present. I'm actually just looking at asking a local restorer to see if they have done it before. Perhaps supply it to them so it will be as near to the original as possible and not just whatever they buy. If they think they can do it neater....I might let them do it instead. Thanks for the offer of mailing templates though!

The ones I've seen so far are self adhesive. I think I have read about 'fittings' so I guess the originals maybe had fittings but assume it just adheres to the bonnet (sticky side down, other side (whatever that may be) facing engine....with my beyond limited knowledge of course! :)

Like this one....Not one with a foil side. https://www.efoam.co.uk/Pyrosorb-class- ... bSEALw_wcB
2019 - 1990 FOX 480B White Auto Turbo.
2016 -1990 G866 XPO 1.7 Light Blue ES
2008 - 1994 M314 NJA 2.0 Red ES
2005 - 1991 J795 AWU 1.7 Paris Blue ES

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Re: Under Bonnet Deadening/Insulation

Post by dragonflyjewels » Sat Mar 09, 2019 10:31 am

Our bonnets are made of fibreglass, so the thin sheet of metal is needed to stop radio interference. The cable is connected by a small crocodile clip. Hopefully yours are still there.
Sylvia

Snazzy - 1993 Paris Blue ES red dipstick 2.0i bought 2001
Lethal Lily - 1991 White Turbo with richmod
hubby has
Sven - 1994 Dark Green GT
Evil Eva 1992 Paris Blue Turbo with Robou mod

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Re: Under Bonnet Deadening/Insulation

Post by edie_fox » Sat Mar 09, 2019 11:17 am

dragonflyjewels wrote:
Sat Mar 09, 2019 10:31 am
Our bonnets are made of fibreglass, so the thin sheet of metal is needed to stop radio interference. The cable is connected by a small crocodile clip. Hopefully yours are still there.
Ooooooohhh.... :o I'll have to have a look! Thank you.
2019 - 1990 FOX 480B White Auto Turbo.
2016 -1990 G866 XPO 1.7 Light Blue ES
2008 - 1994 M314 NJA 2.0 Red ES
2005 - 1991 J795 AWU 1.7 Paris Blue ES

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Re: Under Bonnet Deadening/Insulation

Post by eye of ra » Sat Mar 09, 2019 12:41 pm

I believe another reason for the metal is that being plastic the bonnet can become statically charged.
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Re: Under Bonnet Deadening/Insulation

Post by jifflemon » Sat Mar 09, 2019 7:58 pm

dragonflyjewels wrote:
Sat Mar 09, 2019 9:51 am
I'm in the middle of a project to replace ours - I carefully peeled the 2 side pieces off and have cut paper templates for them. If you pm me your name & address I'l cut copies and post them to you. It should be 2cms thick. I haven't got as far as the centre one, still debating what to stick them on with, and whether to have the 'metal' side in contact with the bonnet (harder to stick shiny surfaces) or have it metal side showing and protecting the foam. Also unsure if it's sturdy enough to clip the wires onto - the originals had what felt like a sheet of very thin aluminium on the backs but it disintegrated so I can't re-use it. Anyone got any thoughts on that ?
What sort of size are the templates? If it’s less than a3 then I could whack them on the work scanner and have a pdf available for download.

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Re: Under Bonnet Deadening/Insulation

Post by dragonflyjewels » Sat Mar 09, 2019 8:25 pm

49 cm long, so longer than A3. Nice thought though.
Sylvia

Snazzy - 1993 Paris Blue ES red dipstick 2.0i bought 2001
Lethal Lily - 1991 White Turbo with richmod
hubby has
Sven - 1994 Dark Green GT
Evil Eva 1992 Paris Blue Turbo with Robou mod

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Re: Under Bonnet Deadening/Insulation

Post by dekkb » Mon Mar 11, 2019 8:37 am

I've replaced mine as it was worse than useless and kept blowing the foam dust into the cabin, usually just after I'd cleaned it :angry:
I've gone with a 6mm Butyl rubber version with the 'aluminium' side facing into the engine bay. I've also gone for full coverage rather than the three separate sections, partly because it was easier to do and partly because being 6mm it clears everything that the thicker foam is cut around. The Butyl is a lot denser than the foam so 6mm actually kill more noise and reflects more heat than the original anyway.
I'll take a photo shortly and upload it.
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Re: Under Bonnet Deadening/Insulation

Post by dekkb » Mon Mar 11, 2019 2:25 pm

Image ImageImageImage

Not sure if I've done that right, but if I have this is it fitted. I've sliced the foil layer and re-attached the croc clips and secured them with aluminium tape to keep the secure.
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Re: Under Bonnet Deadening/Insulation

Post by timrosser » Mon Mar 11, 2019 2:34 pm

Hi All, is there any chance of the insulation Syliva pattern being put up as a pdf or how to guide?

Many thanks

Tim

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Re: Under Bonnet Deadening/Insulation

Post by jifflemon » Mon Mar 11, 2019 3:19 pm

dekkb wrote:
Mon Mar 11, 2019 2:25 pm
Image ImageImageImage

Not sure if I've done that right, but if I have this is it fitted. I've sliced the foil layer and re-attached the croc clips and secured them with aluminium tape to keep the secure.
The best way to do the images is to put them into a shared album. then click the photo, right click and select "copy image address" - you'll get a MUCH bigger link for the image which can be pasted in between the IMG tags.

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Re: Under Bonnet Deadening/Insulation

Post by dekkb » Mon Mar 11, 2019 7:16 pm

jifflemon wrote:
Mon Mar 11, 2019 3:19 pm
dekkb wrote:
Mon Mar 11, 2019 2:25 pm
Image ImageImageImage

Not sure if I've done that right, but if I have this is it fitted. I've sliced the foil layer and re-attached the croc clips and secured them with aluminium tape to keep the secure.
The best way to do the images is to put them into a shared album. then click the photo, right click and select "copy image address" - you'll get a MUCH bigger link for the image which can be pasted in between the IMG tags.
I'll have to sort it at work tomorrow then. So if I do a shared album on my Google photos and share from there. I did start with a bigger link but I thought it looked WAY too big 😂
Previous: 440 turbo ( broken with an impressive loud bang) 2008
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Re: Under Bonnet Deadening/Insulation

Post by edie_fox » Tue Mar 12, 2019 1:21 pm

Thanks for all the options and discussion :)

If anyone wouldn't mind PMing me an image (save uploading elsewhere and whatnot) of the full under bonnet of an original one so that I can just see how close to the edges/which sections were and weren't done etc, that would be really great. I'd like to re-do it as close to how it was originally intended.
Thanks so much. :D
2019 - 1990 FOX 480B White Auto Turbo.
2016 -1990 G866 XPO 1.7 Light Blue ES
2008 - 1994 M314 NJA 2.0 Red ES
2005 - 1991 J795 AWU 1.7 Paris Blue ES

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Re: Under Bonnet Deadening/Insulation

Post by jifflemon » Tue Mar 19, 2019 8:02 pm

Sorry, forgot to upload this one:

Image

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Re: Under Bonnet Deadening/Insulation

Post by edie_fox » Tue Mar 19, 2019 10:53 pm

jifflemon wrote:
Tue Mar 19, 2019 8:02 pm
Sorry, forgot to upload this one
Thank you! Wow, a lot more complicated than just filling the spaces then. :nuts:
2019 - 1990 FOX 480B White Auto Turbo.
2016 -1990 G866 XPO 1.7 Light Blue ES
2008 - 1994 M314 NJA 2.0 Red ES
2005 - 1991 J795 AWU 1.7 Paris Blue ES

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Re: Under Bonnet Deadening/Insulation

Post by jifflemon » Tue Mar 19, 2019 11:11 pm

I guess that depends....

If you used the original thickness stuff, then yes, you'd probably need the cutouts. I've been looking at using Silent coat Buffler which is only 20mm thick, so may not need the cutouts.

(I got the bonnet out to take photos and measure the thickness of the foam, then got so obsessed with uploading the pictures, finding the thread and commenting, that I completely forgot to measure the thickness... :nuts: )

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Re: Under Bonnet Deadening/Insulation

Post by dekkb » Wed Mar 20, 2019 5:55 pm

Image https://photos.app.goo.gl/DCsQTsgsQJUiqvmv6

See if either of those work, I haven't had time to sort them properly but hopefully that should link you to some pictures of my install. It's 6mm foil backed butyl and was very simple to just fit as a complete sheet.
(edit: the link seems to)
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Re: Under Bonnet Deadening/Insulation

Post by Alan 480 » Wed Mar 20, 2019 6:47 pm

jifflemon wrote:
Tue Mar 19, 2019 8:02 pm
Sorry, forgot to upload this one:

Image
shame on you for not having a piece of padding under bottom edge, :wink:

I have to confess lots of ours has fallen off over the years or turned to dust.
for info the SS1 is GRP and has nowt fancy glued in there for noise/radio suppresion (or anywhere) so if pushed I'd just put some foam on, without foil, or clean it all off, it can look quite clean under there (not ours)

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