500 Radiator Temperature Switch
A radiator temperature switch is needed to control when the electric fan switches on and off.
One switch commonly used in 500 electric fan conversions is a bi-metallic
temperature switch like one shown in this photo. At the time of this writing,
this switch is readily available on eBay; a search for the term "80C
temperature switch" should return several hits. Sometimes the switch may
be referred to as a KSD301 switch. The important features are that it have
normally-open (NO) contacts and an operating temperature of 80C.
Ideally, the switch should be mounted on the bottom radiator tank. The
mounting tabs and terminals can be carefully bent if needed.
J-B Weld worked well
for securing the temperature switch to the radiator.
Amp
42640-2
Faston 0.250 receptacle terminals with dimples and matching plastic
receptacle
sheaths from Eastern Beaver were used to connect to the temperature switch.
The wires were routed in
corrugated
wire loom for support and protection.
CX/GL Forum member
MGR1 came up with a very nice way to mount the temperature sensor. He
fabricated a brass plug with M12 x 1.25mm threads and a shallow hole cut in the
top of it.
Next the sensor was glued into the plug, and then the assembly was installed
in place of the standard radiator drain plug.
Electric Fan Conversion Justification 500
only
Tachometer Cable Screw Replacement 500 and 650
Electric Fan Selection and Mounting 500 only
Camshaft Clearance Considerations 500 only
Fan Power Relay 500 and 650
500 Radiator Temperature Switch 500 only
650 Radiator Temperature Switch 650 only
Fan Always-On Modification 500 and 650