Replacing Temperature Sensor
 

Forum Experts:

When replacing the fan temperature sensor (for the main fan) on my 1986 190E 2.3-16V, should I use an anti-seize material on the threads of the temperature sensor?? As you know, this sensor/switch is threaded into the head near the thermostat housing.

I have conflicting concerns about dissimilar materials (brass and aluminum) as well as heat transfer. Manuals do not cover this level of detail.

Thanks for any advice!

Tom Elerding

Use of Anti-Seize
 

I went ahead and removed the old Temp switch and replaced it with the new one. No sign of prior coating on the threads, so I guess that answers my question.

I had suspected the sensor was bad--the main fan did not go on until about 110-115 degrees.

It now goes on at 100 degrees like it should. This should get rid of that nasty overheating at idle/in traffic problem.

Best regards

Tom Elerding