Expanding Foam - Aaaaaaargh!

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Jim McCrae
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Expanding Foam - Aaaaaaargh!

Post by Jim McCrae »

I took off the kick panel on my Traveller to investigate corrosion in the lower sill and discovered that a previous owner has filled the sill with expanding foam. It appears that the foam has prevented drainage and held water against the sill causing the corrosion. What a mess!

https://imgbox.com/LPEErWWU
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rocco
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Re: Expanding Foam - Aaaaaaargh!

Post by rocco »

I imagine the foam was used to cure a rattle. Doesn't seem like a terrible idea on the surface but only if using the car in fair/dry weather.

Did you only take one side off? Might be nasties under the other sill too :-?
1961 Morris Minor 1000
Jim McCrae
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Re: Expanding Foam - Aaaaaaargh!

Post by Jim McCrae »

I suspect someone thought that foam would seal out moisture but it seems it actually trapped it.
I have only explored one side so far but I will tackle the other later.
myoldjalopy
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Re: Expanding Foam - Aaaaaaargh!

Post by myoldjalopy »

Goodness knows what they thought - it does seem a crazy idea!
kevin s
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Re: Expanding Foam - Aaaaaaargh!

Post by kevin s »

it used to be done by OEM's to prevent noise (imagine an open box member with a few holes in it is a bit like an organ pipe),that would have been after ecoat though and I can't imagine it will have any benefit on a minor.
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