[harborman]

Sounds like coolant is not circulating through your system. How is the water pump? What is the maintenance history, any?? When was the water pump changed last? What is the oil temp/pressure when this happens? Just some ideas. I am sure others here will have some good ideas. What ever, I would not keep trying to run it until you find out more. You may cause more damage to it. Does the oil pan look liked it may have a new gasket? Any signs of work done on it? Again, any documented service history. Hope you find out and good luck with it.