Working on my 40 year old Huskey Bolens garden tractor I found a few broken bolts in the front end and mounting the engine, they were all grade 5 bolts, no idea if they had even been out before.
I drilled and removed the studs without too much problem, the one in a big cast steel piece took a few minutes with a MAPP torch.
So should I replace them with grade 8, hoping they wont break again? Or do I still use grade 5 so I am able to drill them again if they do break?