16-03-2023, 07:35 AM
If the slots are not too damaged:
Freezing spray and penetrating oil, then, after a while,
heat and penetrating oil - not WD 40 - acetone and Diesel mix is good.
File a screwdriver blade to fit the screws as precisely as you can.
Turn them bacwards and forwards, but without a serious amount of force, for maybe a minute or two each.
Then try hard to see if they turn.
If not, drill just the heads off. This leaves little studs that you may be able to freeze/heat better, and turn with mole grips.
Better with the tank off, but even with the tank off, emptied and washed out, do not use any sort of flame to heat the studs.
Freezing spray and penetrating oil, then, after a while,
heat and penetrating oil - not WD 40 - acetone and Diesel mix is good.
File a screwdriver blade to fit the screws as precisely as you can.
Turn them bacwards and forwards, but without a serious amount of force, for maybe a minute or two each.
Then try hard to see if they turn.
If not, drill just the heads off. This leaves little studs that you may be able to freeze/heat better, and turn with mole grips.
Better with the tank off, but even with the tank off, emptied and washed out, do not use any sort of flame to heat the studs.