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MG MG Y Type - YA Soundproofing ???

Hi All
So I am sorting through a pile of interior millboard panels ,boot ,doors etc and I came across some sheets of what is like roofing felt but a bit thicker and stiffer and flat.
There are 4 approx 15" x 9" rectangles
2 approx 15" x 15
1 maybe 18"x 15"shaped
and 1 approx 18"x15" with a square cut out on one of the long edges.

The sizes are guestimates but pretty close I think.
Now I can only imagine they are for soundproofing but they are so hard and only maybe 2mms thick so i would have thought they were no good for that .No trace of any padding on them .

Any ideas anyone ? I must have taken them off but I have no memory of doing it -about 9 years ago .Sorry this has dragged on a bit !

Help please
Thanks a lot
John B
J K Bowman

To continue this saga........
The big one with the cut out fits on the base of the spare wheel slot.
The two larger ones go under the back seat but still at a loss about the four smaller ones ?
Is it one in each door ?
Are they all glued to the metal wherever they fit ?

John B
J K Bowman

Hi
i got my YA last year
i think this car was absolutly original
i found also this black cards in both doors
and behind the sunroof

perhaps condensation oder soundproofing

in the moment i start the rebuild
all parts painted
engine back in chassis
now working on the break System

i think about something like this inside the doors and the roof

Armaflex ACE selbstklebend Dämmmatten 6mm/1m² Dämmung

good for sound and good for condesation
FT Franz

John,

Perhaps I can assist on two points:

When I dismantled YB0952 some 30 years ago it was in a remarkable state of preservation and had nearly all of its original pieces/parts intact. The material you descibe is indeed the 1940's version of sound proofing. It is mentioned several times in LTBY's, but unfortunalely no detailed dimensions are given.

Like you, I took measurements of all the panels and my wife made scale dimensional drawings of them along with the number required and their location on the car. I forwarded the original drawings to Paul Barrow for inclusion on his website. I do not know where that project stands.

The orig panels were made from a bituminous impregnated felt paper very much like roofing felt. In fact, I was able to reproduce several panels by laminating two layers of 40# felt together and trimming to them to the desired dimensions. The two layers measured within a mil thick of the originals.

I installed all the pieces in the car using 3M 8090 Super Trim Adhesive (file:///C:/Users/Owner/Downloads/multimedia.pdf).
It is a neoprene rubber cyanoacrylate based spray product and is undoubtedly far better than what was used originally.

In the same vein, there are numerous sound deadening products available that must be better than the orig boards. https://www.moss-europe.co.uk/shop-by-model/mg/mgb-c-v8/interior/trim-panels-fittings/dynamat-xtreme-superlite-step-1-sound-insulation.html

Hope this helps. If Paul is unable to supply copies of the orig drawings I will try and see what I can recover from my orig notes taken in 2012.

Rocky
Rodney C "Rocky" von Dullen

JB I have those sheets too, and will store them away when I reassemble the Y - because after using Dynamat all through the interior of the BGT, I would not use anything else. It's that good, in my opinion. Easy to cut and install - but a craft roller is utterly indispensible when you press down into crevices, floor ribs ... everywhere. John.
J P Hall

Gentlemen
Thank you for your comments and tips .When I removed all these panels I actually labelled them but over the years the masking tape labels dried out and fell off and the ink disappeared .Hence my question.
Hard to believe they thought it would work as soundproofing!!!Thanks for the tip about the glue . I think the sheet in the spare wheel slot will need gluing down to stop it moving when the spare is slid/rammed/forced into position.
I've heard of Dynamat and how good it is, so it seems under the backseat and bulkhead would be a good idea for that .
Would it be beneficial under the sunroof and rear roof section to avoid drumming?
I do realise that at the end of the day it is an xpag in a 70 year old bodyshell so there is a limit .
Thanks again guys
John B
J K Bowman

Hi All,
I am about to reline the spare tyre/ tools compartment on my YT .
Were the panels referred to more or less continuous over the floor under the spare tyre, the step down and the horizontal section right at the rear?
Any hints on the details for doing this would be appreciated.
The pics in LTBY's p 130 and 131 don't show the extent of the "sound proofing" all that well. I would think it would protect the paint work and prevent the tools contacting the floor directly, but as others point out, may not do a lot for noise.

regards KGM
K G Mills

Just be aware that after installation of all this soundproofing in your Y-Saloon, you will be horrified by the engine noise when you open the windscreen !

Don't ask me how I know this ?.

When you live in the Sub-Tropics, the windscreen is open whenever possible.
A L SLATTERY

Hello Tony,
last I heard, from all reports, you are currently just emerging from a period of flooding rains. Hope you are high and dry.

Since I have a fairly well established hearing loss, the YT , if ever I finish it, won't cause me any worry noise-wise.
I shall probably just use RESPONSE 5mm foam and more-or-less cover the lot, spare tyre floor, and tools' compartment, as it is easy enough to use, and as you say, it ain't ever going o be a quiet car.

regards KGM

PS At last check, my YT ain't a saloon. It fact it ain't really anything much just yet, sans radiator, sans carbies, sans floor, sans hood, sans wiring, sans dash, sans wheels. But best part of the "car" after its very beautiful paint job (just ignore the faint wisps of smoke from bank balance I fear.) would be that I do have the instruments back from Otto's.
K G Mills

I decided that as the boot etc was way up the back and there is plenty of wind noise in the YT, I would not use any insulation there.
I have carpet underfelt under the floor carpet and used Dynomat insulation / heat shield in doors, on firewall and quarter panels, tunnel and rear of rear seat, as per photo.

Tony, lives on top of a high hill, but has a gully down the back of his block.

Stuart

Stuart Duncan

When I took my YA about two years ago, there were bituminous felt boards in the roof behind the sunroof, and what looked like horsehair (that was full of mites and bugs) behind the dashboard cover. I replaced it all with 3mm rubberized soundproofing material that greatly reduced engine noise and stopped all draughts. It is light and easy to use, coming with an adhesive side. Definitely worth considering, I'd say.
A J R Felthouse

Ha! - you must have the same bank account as me, Stuart ... made of rubber. Tony S. has reminded me that it's Y75 next year, so like you I'm trying hard to finish a project that (in my case) has been languishing for 20 years. Hope to meet you there.
John.
J P Hall

This thread was discussed between 17/11/2020 and 25/03/2021

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