Sill replacement is about the biggest job tackled on an MGB, so possibly not
the ideal one to start your welding career with. The outer sill, inner
membrane (normally hidden), inner box section (in the cabin), and castle
section (underneath) are the main structural members of the car. Get those
wrong and not only can it fold up when you open the doors, but more
seriously crumple up in a relatively low impact shunt, and that is the
*cabin* space crumpling while the ends remain relatively intact! An outer
sill 'mostly sound' may not be good enough unless it is only surface rust
from an untouched-up scrape, and the first rule of metal work is that it is
always worse on the inside than what you can see. I can't really see the
castle section crumbling away and leaving sound floor, outer sill, inner
membrane, inner box section and floor, two or three usually crumble away at
the bottom if not all of them together. Anything can be repaired, at a cost
or with knowledge. Another golden rule is to buy the best you can afford to
begin with rather than buying cheap then spending much hours and pounds
getting it to a usable state. Mid to upper range welding kits in the
Halfords range should be powerful enough, but you may well be able to get
them cheaper from specialist suppliers. Practice on some scrap of the same
thickness as the sill members, then rip them apart to see how good your weld
was, before starting on the real thing.
PaulH.
----- Original Message -----
> .. The only major body problem is the drivers side inner sill - or
> rather lack of it! The outer sill is there and mostly sound, the inner
sill
> above the floor is fine, but the inner sill below the floor is pretty much
> non-existant. The jacking point is barely hanging on, and part of the
> tranverse floor stiffener is pretty bad, although the floor itself seems
> sound enough.
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