Thanks for all of the tips. My problem is that the fan roars all the time, any time the engine goes past about 2500 RPM and the noise at higher speeds is annoying. My experience with fan clutches that WORK is that when the engine is cool or when you're on the highway the fan slips enough that it will not roar, but only roars when maximum cooling is needed. Also, having the clutch will save some power and gas on the highway as any engine HP going to turn the fan is wasted at 70 MPH.

I can buy it new for under $170 online for the Behr part and that's who makes the OEM part anyway. I also have a spare left in the trunk by the PO that I might try out first and see if it works.

This car's had some major cooling system mods which I think were originally made because of overheating due to a scaled radiator. Rather than fix the condition by recoring or replacing the radiator, they did all sorts of little tricks to try and work around it. One by one I am restoring it to stock...so far every change I have made has improved it.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz