Rear Main Seal

[DVSRICK]

Double check your fins on the radiator and make sure they are open. Also if you think you have an air pocket in the motor get a pressure release cap and after you drive it for a good distance when you park pop the hood and release the pressure but make sure your overflow bottle is full and should only take a few times.

[SloSVO]

you sure the fan is good... with the engine running and at operating temp.. try and stop the fan with a piece of carboard.. if you can stop it .. you need a new fan clutch..