Looking for a thermo time switch for fast idle solenoid

Stevehose

Stevehose

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I'd like to be able to engage my a/c idle solenoid mod with a thermo switch, effectively turning it into a cold engine fast idle device also. Is there a thermo switch that will be on when engine temp is cold, but switch off when it is warm?

If so, is there one that fits into the existing temp sensor location (dual use-switch for this and sender for gauge), or a separate one that fits into the radiator drain plug, and what is the thread size/pitch for this plug?

Any ideas appreciated.
 
Last edited:
Just use a relay with an 87a and 87 configuration. Connected when cold by default.
 
Connect the single pole - double throw relay to the power wire that feeds the AC compressor Pin 85 to AC wire, 86 to ground and 87a to valve (will be on with no power to AC). When AC kicks on it will switch to 87 turning power off to valve.
 
For cars that use two radiator fan switches to control the auxiliary cooling fan. The low temperature switch turns on the fan at low speed. The high temperature switch turns on the fan at high speed. The car came from the factory with a 91-degree Celsius low temperature switch and a 99-degree Celsius high temperature switch.
Bavarian Autosport offers a special low temperature switch that will turn the fan on at 82 degree's Celsius. We recommend using the 82 degree switch for the low speed and the 91 degree switch for the high speed (instead of the 91 deg. & 99 deg.). This will allow the fan to start at a lower coolant temperature, which will help prevent over temperature conditions in hot weather.

Minor modifications are required - The female spade terminals on the wiring harness for the high temp. switch are smaller than the male terminals on the 91 degree switch. Just clip off the smaller terminals and crimp on two standard female spade terminals. Please note: - modifications required

Part Number Description Price Qty.
61 31 1 364 271
Radiator Fan Switch - 82 degree Celsius

$ 17.95
 
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