Careful with the citrus flush...
I have seen much discussion about trying to circumvent cooling system design around the viscous fan clutch. In my case, I put off the purchase of a new unit to replace the worn, noisy clutch on my 201. Once I caved in and ponied up the cash, I do not know why I was so avert to replacing the thing. The difference is like night and day.

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327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...