You can try spot welding the bottom of sills around here if you want, but unless your one of the big accident repair shops the local mot stations will insist on a seem weld along the bottom.
I'd ask them to show me the part of the tester's manual that states that a panel or repair cannot be spot welded where it was originally spot welded.
If someone on here has a copy of the 6th edition could they post the exact wording from it regarding this please?
tester's manual said:It is essential that repairs to corroded areas are properly carried out. Only welding is acceptable for repairs to 'prescribed areas'.
Suitable materials of appropriate gauge and thickness should be used for repairs so that
- Any plating or welding extends to a sound part of a load bearing component, and
- The repair must be virtually as strong as the original structure
So only a continuous seam weld is acceptable for patch repairs, (even if the patch extends beyond the prescribed area) although spot welded joints are acceptable where they originally existed. (provied the original defective panel flange has been removed)
Stitch or plug welding is acceptable as an alternative to spot welding in these cases.
Welded repairs to highly stressed components such as steering/suspension arms, rods, levers etc are not normally acceptable.