Magnafluxed, now what the F

Magnafluxed, now what the F

The residual magnetism will likely weaken over time and with hot / cold cycles from running. There may be internal areas that will not de-mag for you.

Scamp Fasty said
...… I read I can wrap the block with the positive lead from an AC arc welder with 5-6 wraps, and then weld on some scrap. The scrap should be clamped on block with ground on opposite side of the scrap. The wraps make a coil and should induce current and a magnetic field. Ground wire should take care of induced current, I think. Anyone ever try this or another method that worked?

I've never seen it but if they can de-mag ships, a block would be small potatoes.

FWIW, Turning coil current off while a part is still in it will tend to induce magnetism from what I recall. Way back when I demagnetized using a fixed coil, the parts needed to be away from the coils influence before shutting it off to meet the Gauss spec.

There are small portable demagnetizers that can be used such as in the link below or wands. Maybe the shop has one you can try.
https://www.magnetics.com/product.asp?ProductID=49

IDK but a cheap picture tube de-Gauss coil may even work.