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Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sat Jun 20, 2020 8:58 pm
by awatkins
My S3 has a deteriorated strip of foam rubber running across the ledge under the rear edge of the bonnet. It appears to have been 3/4ā€ high or less, Iā€™m not convinced it would reach the underside of the bonnet, but regardless, does anyone know its purpose and correct dimensions?

Thanks, Alan

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sat Jun 20, 2020 9:21 pm
by h20hamelan
I used, seems correct

Frost King R930H Sponge Rubber Foam Tape 9/16-Inch, Black

$8 at hardware store

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sat Jun 20, 2020 10:21 pm
by awatkins
And that is compressed when you close the bonnet?

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sun Jun 21, 2020 1:03 am
by h20hamelan
It has some compression as I can see/watch it expand after popping the bonnet
At $8, your not out too much I hope

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sun Jun 21, 2020 3:17 am
by awatkins
OK, so my only question is, why? What does blocking airflow through that 1/2ā€ slot accomplish?

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sun Jun 21, 2020 6:18 am
by Andy8421
The air intake for the heater is immediately aft of the foam strip, so I had always assumed it was to stop the usual cocktail of engine smells being drawn in to the heater and then into the cabin.

It could of course just be to stop the bonnet rattling.

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Sun Jun 21, 2020 7:48 am
by awatkins
Thank you, Andy. That makes perfect sense; I had completely disregarded the presence of the cabin air intak right downstream.

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Wed Jun 24, 2020 8:48 pm
by skelteanema
Hi,

any photo of where this is located? I don't have this on my car.

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Thu Jun 25, 2020 2:53 am
by awatkins
See the engine bay photo here:


http://lionheartsolutions.com/sprint026 ... ay2017.JPG

and on the right you will see a strip of grey foam running almost the entire width of the engine bay.

Re: Foam strip at rear of bonnet (S3 Elan) purpose and size?

PostPosted: Fri Jun 26, 2020 12:02 am
by pharriso
awatkins wrote:See the engine bay photo here:

[http://lionheartsolutions.com/sprint0260k/Images/0260K_EngineBay2017.JPG

and on the right you will see a strip of grey foam running almost the entire width of the engine bay.


Looks familar :roll: , the link is:
Image

& for those of you in the UK, Vince Haydon sells these on ebay Regularly, his id is vojihay