87 Cherokee pioneer, 4.0, 4x4
My dash gauge never reads over 160 although IR probing the engine shows normal operating temp. anywhere between 190 and 220 depending on where you probe. Water neck is pretty solid in the 190s. I replaced the factory closed tank with an aluminum version with a 16lb radiator cap on it. It still just randomly pukes for no reason. I suspect the dash gauge doesn't work but the fact taht it's puking makes me think there is more to it. Compression test is good, no water in oil or oil in water. Stock 195 degree thermostat. I haven't been driving it much lately but the last time I did it seemed to boil over pretty frequently for anything other than regular low stress highway driving. Anybody seen this?
My dash gauge never reads over 160 although IR probing the engine shows normal operating temp. anywhere between 190 and 220 depending on where you probe. Water neck is pretty solid in the 190s. I replaced the factory closed tank with an aluminum version with a 16lb radiator cap on it. It still just randomly pukes for no reason. I suspect the dash gauge doesn't work but the fact taht it's puking makes me think there is more to it. Compression test is good, no water in oil or oil in water. Stock 195 degree thermostat. I haven't been driving it much lately but the last time I did it seemed to boil over pretty frequently for anything other than regular low stress highway driving. Anybody seen this?