Im enclined to proceed w/ the stat first as tubs stated. I always buy a heavy duty version w/ a better spring,metal,etc for $2-3 more than avg unit ($4-6).
I also respect the fact that your cooling fan may be getting weak. One of my ford super duties in my fleet was doing just as you described, then i replaced the cooling fan blade because it was not turning fast enough to cool at a standstill. So im w/ tubs and/or sixwheeler on this repair. Im a thermostat nut-case anyways and would reccomend putting a super stat in anyways just to be safe. Good luck, BC
I also respect the fact that your cooling fan may be getting weak. One of my ford super duties in my fleet was doing just as you described, then i replaced the cooling fan blade because it was not turning fast enough to cool at a standstill. So im w/ tubs and/or sixwheeler on this repair. Im a thermostat nut-case anyways and would reccomend putting a super stat in anyways just to be safe. Good luck, BC
