well it could be.

sometimes when your car gets hot it will boil loose a lot of junk that is clinging to the inside of your motor and float it around. this stuff then gets lodged in the rad. and after fixing the reason for the hotness you still have hotness cause of the plugged cores.

did you check the fluid level? could just have a big air pocket, too.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.