Supahonky Posted 3 hours ago Share Posted 3 hours ago (edited) I’ve got an 89 R model with an e6. In the winter my dumptruck would run cold and now things are warming up it would go up in temp and the I’d get a shutdown light and buzzer. Mainly when I was loaded on a warm day. I figured it was time for a thermostat. I just replaced it and now it warms up quick and holds an even temp however the shut down buzzer and light are on. My question is could a temp sensor to the warning be bad? The temp on the gauge is 155 but im not sure the accuracy of the gauge…. Edited 3 hours ago by Supahonky Quote Link to comment https://www.bigmacktrucks.com/topic/75563-r-model-with-e-6-temp-warning-light-help/ Share on other sites More sharing options...
Adkat Posted 2 hours ago Share Posted 2 hours ago Yep temp switch could be going bad. 155 sounds alright if your just poking about not really working the engine, possibly a little on the low side , would have thought it should be about 175-180ish. Get yourself an infrared temp gun and check the top pipe outlet to check the temp against the gauge Would have thought the temp warning lamp wouldn't come until around 220-230? But can't be sure. Adam Quote Link to comment https://www.bigmacktrucks.com/topic/75563-r-model-with-e-6-temp-warning-light-help/#findComment-576310 Share on other sites More sharing options...
Supahonky Posted 1 hour ago Author Share Posted 1 hour ago Is the temp sensor for the gauge on the radiator. And the one for the warning system on the coolant manifold? Any way to test them besides temp gun Quote Link to comment https://www.bigmacktrucks.com/topic/75563-r-model-with-e-6-temp-warning-light-help/#findComment-576312 Share on other sites More sharing options...
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