Best way to deal with this rust?
Discussion
Hey all,
currently engaged in a rebuild of a '77 MGB Roadster. The engine, gearbox, and the rest of the mechanicals all need total rebuilds, but the body seemed pretty sound. Or so I thought...this evening I found that the dreaded metal moth had paid a visit to the NS front chassis rail:
From outside:
From below:
From inside the engine bay:
Peering inside the holes and having a good bash with a screwdriver, it looks generally ok in there, no other holes, and the floor above is sound. (Looks like a new section in fact which has been welded in).
The question is, what's the best way to deal with it? Seam weld big plates over? Cut out and fabricate a whole new section and weld that in (which would end up being made of plates welded together anyway because of the curve)? Cut out pieces one at a time and patch it?
Currently I'm thinking of cutting out the bottom, welding a new piece in, then cutting out the side and replacing, leaving the rounded edge. Not sure if this will cause the body to sag while I'm doing it?
currently engaged in a rebuild of a '77 MGB Roadster. The engine, gearbox, and the rest of the mechanicals all need total rebuilds, but the body seemed pretty sound. Or so I thought...this evening I found that the dreaded metal moth had paid a visit to the NS front chassis rail:
From outside:
From below:
From inside the engine bay:
Peering inside the holes and having a good bash with a screwdriver, it looks generally ok in there, no other holes, and the floor above is sound. (Looks like a new section in fact which has been welded in).
The question is, what's the best way to deal with it? Seam weld big plates over? Cut out and fabricate a whole new section and weld that in (which would end up being made of plates welded together anyway because of the curve)? Cut out pieces one at a time and patch it?
Currently I'm thinking of cutting out the bottom, welding a new piece in, then cutting out the side and replacing, leaving the rounded edge. Not sure if this will cause the body to sag while I'm doing it?
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