Coolant Temp Sensor

I have a '95 SL2 with two coolant temp sensors.

One is mounted to the engine block (I assume this is the one for the gauge)

The other is mounted in the coolant reservoir tank. ( I assume this is the one for the aux. fan to turn on)

Am I correct? If not what is the function of the one mounted in the coolant reservoir tank?

Jerry

Reply to
JJ
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And for the computer.

Nope. That's your coolant level detector.

Reply to
Kirk Kohnen

I wondered about that. Can you explain how that thing works? Seems to be a glass enclosed microswitch. No contact with the coolant, just sits in a chamber which extends into the reservoir. I really don't understand how it works. Not really having problems with it, removed the tank to clean it out real good and saw it and when I removed it the rubber "o" ring fell apart. Doesn't seem to be a water seal as most of it was already missing. When I reinstalled it I used some Teflon tape to seal it. I assume the "o" ring seal is for dust & dirt. No leak as far as I can tell.

Jerry

And for the computer.

Nope. That's your coolant level detector.

Reply to
JJ

I think I've got it. the sensor is a magnetic reed switch and there is a float with a magnet on it so that when the coolant gets too low the magnet activates the switch. I think I'm correct.

Jerry

Jerry

And for the computer.

Nope. That's your coolant level detector.

Reply to
JJ

Both coolant temp sensors are located in the cylinder head. The one with 2 wires is the one for the computer and the one with a single wire is the one for the gauge.

Reply to
BANDIT2941

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