leaky heads gaskets, I'm losing it!

and the unspoken truth is, if some do and some don’t. It’s close, maybe close enough that a little core shift/rust/casting flaw allows water to enter the hole. I have seen video of a guy chasing a rear main seal leak. The video is of the crank pilot hole in an aftermarket crank. Spin the oil pump with a drill and oil comes out of the pilot hole!!!!! Doh!!