Olds 455 overheating and water in oil.

[lukedukem]

Is there a shop in the area that could Magnaflux your heads to look for a small crack since you have them off?

Since you said you had water in the bilge, have you looked at the freeze plugs to see if any pushed out. That might point to a freezing situation and explain the water in the bilge.

There is a shop near by I can take them to.
I believe the water in the bilge to be from the water pump weep hole. That’s why it overheated first time week ago, but no water in the oil at that run. . All freeze plugs are there.

 

[lukedukem]

Can you take temp readings on the block to determine "hotspots," if an area in the cylinder water jacket is plugged?

Engine is on stand and disassembled. But when in the boat , yes I can take temp readings.