3 sensors atop engine
 

can someone please identify the 3 sensors
sticking out on the side of the valve cover,
and what do they do?

i know coolant/temperature sensor located
at the very back towards the fire wall.

what about the two others?

Sensors
 

Which engine do you have?

If the forward most one has two vacuum lines to it, it is a Thermo Vacuum Valve for the fuel evap cannister. It is normally closed and opens at 50 C.

Jeff

thanks jeff, it is a 124 300E '89. i think, my thermo
vacuum valve is broke, the plastic base is broke.
what kind of problems is associated with it, if any?

Symptoms will be associated with a vacuum leak. There are two vacuum nipples sticking out, one straight and one angled. The angled one connects to a tube running from the throttle body, the straight one runs to a vacuum connection on the left fenderwell, the purge valve. Depending on which one is broke, you may have a vacuum leak constantly, or, only when the switch opens at 50 degrees C.

If you have the CD rom set, you can find the diagram under fuel system, 47-200, Funtion of fuel evaporation system.

Fastlane didnt have the part# 001-140-62-60. My local dealership did for $12.65.

My car is a 89 300SE so the parts should be the same.

Good luck
Jeff

thanks for the info, jeff. happy holidays!!