My 318....Is no more..... :(

Could this be an issue of some water trapped in the block, and boiling before it has a chance to circulate? I can't really tell much from the sound clip. When it is reving up this would create more heat, and the noise is the water trying to get out of where it's trapped. Maybe it is causing a cylinder wall to bulge a little bit. Just a guess, but it really does look like one side of the engine is getting warmer than the other. Also, when my RR spun a bearing it didn't give me near as much time to trouble shoot. About zero. And as an asside, does an engine really need that much oil pressure?