Originally Posted by
CL_MotoTech
I hit it with my automatic center punch and the entire slab fell right off. I should have grabbed a photo.
I used the face mill to basically rough off the backside of the water pump cover. Obviously I didn't get the S&F's right. I faced the cover too, but with a much lighter cut, so somewhere in the roughing phase I am guessing is when the melty bit happened as the finished surface is pretty nice. Occasionally I turn the coolant off to get a look at what is happening, maybe I caused it then? Who knows?