Okay. So, I took it out today on a 5-mile run in city, country and fwy driving. The temperature stayed right at 190 (normal). It wasn’t until I got back home that it began to overheat (in the driveway, idling. On that 5-mile trip I drove it like I stole it).
The AC worked; the heat worked. The top and bottom radiator hoses were hot and firm.
Neither fan turned on until the temp gauge reached 2 lines past normal, then they both turned on high but couldn’t cool the engine down. I revved the engine to 35k RPMs which brought the temperature down to almost normal. While idling afterwards the temp gauge went back up in short time.
I’ve read these fans should kick on before it overheats and stay on afterwards (when the ignition is off to help cool the engine - this didn’t happen). I’m about to replace the fan control module, the radiator fan switch and the coolant temperature switch (all of which I’ve done before, which didn’t make a difference, using parts I’ve bought from Amazon at a fraction of the cost of OEM parts). The OEM parts are about $450 together, but I’m at my wits end. Am I being crazy? Replacing parts I already have? But, maybe I need to do OEM and it will solve all my problems? I’m stumped.
Wednesday, May 31st, 2023 AT 5:56 PM