TDI top engine cover noise insulation?

Fishman

A2OC Donor
I'm interested, I found a remnant of the foam wedged near the o/s driveshaft. It had polished it to a beautiful lustre!

Seriously, yes I'm interested. I'm keen to know how much diesel racket this will hold in!
 

Andrew

A2OC Donor
I'm interested, I found a remnant of the foam wedged near the o/s driveshaft. It had polished it to a beautiful lustre!

Seriously, yes I'm interested. I'm keen to know how much diesel racket this will hold in!
It is unlikely Tom at Crewe Audi will see your post, as per his post two posts above, PM him if you wish to purchase and you have not done so.... just trying to help.

Andy
 

sraka1

Member
Does anyone know the part number of the fibrous engine cover that goes above the insulation? I cannot seem to find it in the ETKA diagrams at all?

Thanks,
sraka1
 

treblezero

A2OC Donor
Tried Harrogate, York and Crewe. Leeds next then. TBH I've not noticed a significant increase in noise since the removal of the debris (quite like the sound of the engine anyway). But I do like to have the right bits where they should be, otherwise, why would they be there in the first place
 

kp 115

Member
Tried Harrogate, York and Crewe. Leeds next then. TBH I've not noticed a significant increase in noise since the removal of the debris (quite like the sound of the engine anyway). But I do like to have the right bits where they should be, otherwise, why would they be there in the first place
Thermal retention as well as noise reduction possibly
 

philward

A2OC Donor
Tried Harrogate, York and Crewe. Leeds next then. TBH I've not noticed a significant increase in noise since the removal of the debris (quite like the sound of the engine anyway). But I do like to have the right bits where they should be, otherwise, why would they be there in the first place
Could be an Audi Tradition part and they are not, or at least weren't a few months ago, exporting to the UK.
 

Robin_Cox

Member
something I would imagine would work for this is expanding silicone foam; Dow Corning were supplying it in the 80s and perhaps later for filling box cavities in German cars to reduce noise/vibration/harshness. There are a wide range of these marketed currently under the Dowsil brand - I remember watching these being demonstrated on open days for the family back in the 80s ; small volume of two liquids mixed in a 2L plastic bottle, after a few seconds they would foam and fill the space. Set relatively quickly. Very dense and sound-deadening, and if you choose the right one, heat-proof. Much less rigid than polyurethane foam.

ie :


If there was a way to cast this in a bag over a dummy engine block shape presumably it would be possible to mould suitably-sized deadening foam pieces over the engine, then trim them back to avoid making contact with anything critical.

If I had any talent I might give it a go, but I know that it would more than likely end in disaster!
 
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