Thanks to NOSbeast for input. Have run it with out therostate , no help.I pulled water pump all is good and thight there, no leaks or slop in the shaft. Radiator flow though checked before install. The fan is NOT backwards either can feel the pull on front of radiator.Still need to try (54TOW) idea about small hole in theromstate. Keep up the thinking guys I can't rebuild this is I can't run it.