Mate, if you have to pull anything to bits to fix this, you're much better off to do it right the first time. If you bodge it up with silicone, I believe you're asking for trouble..BLACK XR6-VCT said:UPDATE:
I have located the problem with the help of Ford dealership:
The brake booster box is welded to the underneath of the scuttle panel. Because the box comes under some pressure, this can cause hairline cracks in the scuttle panel, where water will leak through. This can be welded by ford (they have to remove dash) all up $500. I will attempt to fix this myself with silicone - probably not a permanent solution, but cheaper, if the problem comes back I will have to weld.