Reply to "Radiator thermostats"

Larry,

I'm not familiar with how your cooling system is plumbed as far as which tank is the inlet tank and which tank is the outlet tank. I'm going to assume it is plumbed the way the OEM tank was plumbed.

Hot coolant from the motor enters the "lower" tank. The high temp thermal switch is installed in the lower tank. The oem switch was set at 85 degrees C (185 degrees F). The hex shaped replacement switch sold by the vendors is set at 77 degrees C (170 degrees F).

Cooled coolant exits the upper tank. The low temp thermal switch is installed in the upper tank. The oem switch was set at 70 degrees C (158 degrees F). The hex shaped replacement switch sold by the vendors is set at 60 degrees C (140 degrees F).

Most owners report with a 180 degree thermostat installed in the motor, that once the motor stabilizes at operating temperature, both fans will run continuously.

If you want to find a switch with an alternative setting, perhaps one of the vendors will reveal where they purchase the hex shaped replacement switches at, or perhaps you can browse the internet and locate a source. My guess would be it is a generic part available in many settings.

Spal sells a couple of switches, rated higher than 170 degrees (185 & 195 degrees F), but the threads are 3/8" NPT. Spal also sells an electronic fan control that is adjustable, the sensor for the controller also has 3/8" NPT threads.

Here's a link to Jeg's page for cooling system accessories: Jeg's Electric Fan Wiring Kits & Senders

This is interesting: Adjustable Temperature Switch

cowboy from hell