rylee144 Posted June 20, 2019 Share Posted June 20, 2019 I drove an hour on the freeway at 60+ everything went great. I reached my destination but was early. I parked and let it idle to listen to the radio. I sat for about 15-20 mins and looked at my temp gauge. It had never gone over 210 but peaked while at idle. Is this normal? Is there a solution? An electric fan perhaps. Link to comment Share on other sites More sharing options...
87MJTIM Posted June 20, 2019 Share Posted June 20, 2019 Could be e-fan relay. Could be coolant temperature switch. To test the relay, have the key on/engine off ,unplug the fan relay, drivers side fender, using a wire, jump relay connectors - 30/87. If can comes on, then move to the switch. Disconnect the switch at the harness. Jump the harness plug with the same wire. KO/EO. If fan works then switch is bad Link to comment Share on other sites More sharing options...
DesertRat1991 Posted June 20, 2019 Share Posted June 20, 2019 Yes, you may see a temperature excursion if you park it and heat soak the engine. Mine does this sometimes when driving off-road. Do you currently have an e-fan installed? The e-fan should kick on when your temp reaches ~225, then turn off again at 210 after the situation is back under control. If you have an e-fan and want to test it's activation point, you can bring your truck up to temp then block the grill with a piece of cardboard. The needle will start creeping up. If the needle creeps past ~225-230 without the fan kicking on, call off the test -- something is wrong. Link to comment Share on other sites More sharing options...
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