Ed,
Thanks. I tapped it out and man was there some gunk in there. I flushed it out with a hose and ran my finger around it trying to pull out as much debris as I could. Do all those plugs give access to the coolant chamber, or water jacket? (I don't even know what it's called.) I could not find a diagram that showed the cooling system beyond the water pump.
When installing the new plugs do I just set them in and tap them in with a hammer? Is there a gasket with it?
I learned something today! Thanks Ed.
Sam