another 360/408 over heating

Blinidsquirrel, I dont understand what your looking to do. When I said it doesnt build pressure it meant im not blowing fluid out all over the place. Is the system under pressure, yes. I can tell you that. But im not losing any coolant at all. No visible leaks. Is the system under pressure as it heats up, yea you betcha. I think you are misunderstanding what I was trying to say.
Let me know what you think I am going to see. What are you looking for? Im not a parts hanger, Im trying to get ideas and I respect yours but I think you are not understanding what i said in an earlier post.
Rod