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Showing results for tags 'engine temperature'.
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I know alot of folks have temp fluctuation but I think it usually swings low instead of high. I had this trouble a few months ago and fixed it with a new water pump but its back again. I just had the radiator cleaned and rodded but it hardly had anything in it. Its got another new water pump and I have ran two different radiator caps. I have 3 different t-stats and they all fluctuate the same, two are 190 from napa and one is a cummins 180. I generally see swings from 190-203 or so, usually cruising it stays around 190-194 but will jump up to 197-199 for a second then back down. That doesent bother me as im reading those temps from the ultra-gauge and I think those are fine but when im getting on the interstate or accelerating it gets up to 203 or so and stays there for a few seconds on both the ultra-gauge and the dash gauge. I took it to the radiator guy yesterday and he put some kind of tester on it that is supposed to change colors if there is carbon dioxide present and it didnt change so im hoping its not the headgasket. When I come to a stop or so it goes back to 190 and pretty much stays there or gets cooler so i dont think its the fan clutch. Also after it idles for 10 minutes or so and I turn it off the fan clutch will spin for a few seconds after I turn the engine off but if I get off the highway and let the egts cool to 300 then turn the engine off the fan will stop just about as fast as the motor. I dont think I could put any kind of loaded trailer on this truck or it would probably overheat. Im lost here and just shy of pulling the head.:banghead:
