Well,I believe you should put a new thermostat in without any holes in it.The coolant has to be regulated thru the radiator:with the holes in your thermostat,it is circulating too fast,and the coolant is not in the radiator long enough to give up the heat it absorbed in the block.I would look at air flow thru the radiator.See if the fan can pull a rag up to it when running at various rpms.See if the fins are clean,and not bent up.Also use an infra red thermometer to check against your guage-it may read a few degrees cooler than what you are seeing on your gauge,but if it is 30* or more,I would doubt the gauge.Lastly you may need to do the up grade-many engines are built with minimal cooling capacity by the chasis oem,and not what the engine oem recomennded.Mark
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Today's Featured Article - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father
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