hello, i have a problem with my ram overheating, ive just had the engine rebuilt and its still overheating, it had a cracked head, ive replaced the following, radiator,cap,hoses,fan clutch,thermostate,waterpump,along with the new engine what am i missing has anyone out there had this problem with their ram truck its a 318 engine

 

could you have an air pocket in the engine? Try running it without a t-stat and see if it still overheats.