[Steeveedee]

I sort of got into a loop like that. I ended up replacing the thermostat with a high-flow model after I noticed low flow in the radiator. Overheating at idle is poor air flow, overheating on the road is poor coolant flow. Mine was overheating in both regimes! I switched to a severe duty fan clutch and made my own fan shroud because the fan is too close to the radiator and wasn't coupling with the shroud. After all that is when I noticed the poor flow when hot with the cap off.