Hey all, I have a question about the sensor on the bottom of the rad on the drivers side. Namely what does it do. Obviously it's a temp sensor...but for what. I checked on a program mechanics use for repair info and it stated it is "a cooling fan temp sensor", this seems odd for a car that has a mechanical fan (85 GS). Anyway, I need to know cause I need to buy one, because I broke the old one off in the rad...got a little over zealous with tightening.

Any help would be great. Thanks

 

i was wondering the same thing and also the one on the top, i broke the line to the one on top and i dont even knwo what it does

 

The one on the top (as far as I know) is a coolant level sensor...when it detects low coolant levels (ie rad not full) it turns that add coolant light on your dash on.

 

haha yea that would actually make sence, i broke mine so i put in a FC one in but only it has the over flow go through it aswell so i gotta block that

 

The water temp switch #2, at the bottom of the radiator, goes to the ecu. What it does from there, I am not exactly sure, but it may relate to the hot-start assist. Water temp switch #3, at the back of the waterpump housing, is for the choke hold and release. The one at the top of the radiator is the low coolant sensor, this one is critical.

 

any idea how much water temp switch # 2 retails for? since I need a new one