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International Automotive Technicians Network
Re: Truck won't warm up
Posted to Technical Discussion Forum on 3/22/2023

My next step, as others suggest, would be to measure the radiator-inlet temp with a thermometer or, preferably, a thermocouple.

After the temp stabilizes and the engine is as warm as it is going to get, increase the rpm to, say, 2500 and monitor the temp.

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