Fan clutch Metal vs Plastic?? - Page 2 - PeachParts Mercedes-Benz Forum

qwerty · #16 05-17-2013, 04:19 PM

Quote:

Originally Posted by Shortsguy1

I also wanted to point out that the plastic fans on 240s are designed to always spin at the same speed as the engine...

Is the water pump pulley the same size as the crankshaft pulley?

Shortsguy1 · #17 05-17-2013, 04:40 PM

Sorry, I mis-spoke. The 220D and 240D have the same water pump and water pump pulley diameter. So that didn't change in my alteration. Previously, the clutch was there to de-couple the rotational speed of the fan from the water pump. But now they are coupled rigidly. So I should have said "spin the same relative speed to the engine, as determined by the pulley circumference ratio." Thanks for keeping me honest.

MBeige · #18 05-18-2013, 06:32 PM

When I replaced the clutch on my '83 300D, I replaced the fan as well because it started to show cracks on one of the blades. Reason for changing the clutch was overcooling (clutch was seized).

Here is what I purchased:

000-200-04-22 Fan Clutch (Behr)
110-200-03-23 9-Bladed Plastic Fan

funola · #19 01-20-2015, 11:18 AM

Just removed my fan and viscous clutch from my 85 300D. There's so much more room in there now! I can feel the extra power w/o the drag of the fan and it's quieter! The real reason I removed it is to track down my low mpg. I don't think my fan clutch is releasing and the fan is always engaged. Is it possible to test the clutch on the bench?

I have a manual switch to control the AC aux fan but there was no need to turn it on yesterday (around 39 F ambient) when I was stuck at stop lights in mile long slow moving heavy city traffic.....the temp gauge stayed between 81 to 84 C without the engine cooling fan. I would like to automate the AC electric fan for the warmer months though.

Do you know where I can find a 100 C temp switch that would fit in the T stat housing? I found a post on Benzworld on gasser coolant temp switches Coolant temp sensor - Mercedes-Benz Forum . Do you know if the any of the ones mentioned will fit?