Originally Posted by thatsmrmastercraft
The ice could expand upwards in your example.
I agree with that, but what about any pits or valleys in the casting.... we know it can't be smooth in there, they used sand for the block casting.
I'm just saying that any water that I'd feel comfortable with
that stays in the block would be treated water.
I've pulled engines and drained the antifreeze beforehand.... got them out of vehicle and more water comes out, while it's on the ground, loading into truck bed, etc.... it's gotta come from somewhere