OMG!!! I took out my fan clutch and took it back to the parts dealer that I bought it from to exchange out under warranty. When the newer clutch was a different model number, I questioned why. The counter person checked the book and told me I was sold a "diesel" fan clutch and the gas fan clutch was $60.00 more!!! When I compared them, they physically looked the same but the associate told me that a diesel fan clutch will not engage at the same temps and it is designed to turn and function in a counter-clockwise direction. I put the new one in and as soon as the temp started to rise, I could hear it kick in and the gauge immediately started to drop. I am furious!!! What recourse do I have because I smoked an engine because of this and went through 3 fan blades.

Always double check part numbers and fitment yourself, never trust a "guy" at the parts counter.

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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg
1991 300E - 212K and rising fast...

Is there a way to modify the fan clutch so that it spins with the pulley?

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1990 190E 3.0L

You mean spinning at engine speed? You don't wanna go there. Even when operating correctly the fan spins slower than pulley (engine) speed.

As someone here pointed out the plastic fan and coupling are not designed for sustained high speed. Surprising how much damage a disintegrating plastic fan can do.

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1990 300TE

"24 hours in the day. 24 beers in a case. Coincidence? I don't think so."

damage? what do you mean? I was asking because my fan clutch went out too and I'm in 115° weather in the desert. and would like to do it temporarily until I change my clutch

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1990 190E 3.0L

The VFC disengages at high revs. It's there for high traffic situations.

You are better off putting a temporary over ride switch in which will operate the auxiliary fans when things get hot.

I meant potential for damage. As Ivanerrol says the viscous fan is for low speed cooling and you would be better off installing a earlier cut-in switch for the electric fans. We have very hot summers here and when my vfc was inoperative the thermo fans managed the cooling well with the factory switching point of 107 deg.

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1990 300TE

"24 hours in the day. 24 beers in a case. Coincidence? I don't think so."

I think my aux fans cut in at 105°, but is there a way to install a mechanical fan that spins with the engine instead of a viscous fan? My brother in law has a '72 blazer with a mechanical fan. Is there any adverse reactions with using one?

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1990 190E 3.0L

Your viscous fan cuts in at 105°c & your aux fan at 120°c, that's where the problem lies I believe. So a lower dual temp switch that turns the fans on sooner would be the solution.

A mechanical fan that spins with engine does not make sense to me. Fan spins at high engine rpm when cruising on the freeway, but you don't need it. But when idling or in stop & go traffic when you need it the most, the fan spins at low rpm.

Also you'll loose some power & gas mileage.

These are the switching points in the cooling system. The viscous fan fires at 97 and the aux fan at 107 not 120.

http://w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/103/20-0020.pdf

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1990 300TE

"24 hours in the day. 24 beers in a case. Coincidence? I don't think so."

I know this is a W124 thread, but he has a W201 1990 2.6 & it uses this (0065456124) 105/120 temp fan switch.

http://www.**********.com/search/product.aspx?sid=o4dvkezuyqwrj5riwfwrgy55&makeid=800016@Mercedes&modelid=1192687@190E&year=1990&cid=16@Cooling%20System&gid=4768@Radiator/Auxiliary%20Fan%20Switch

I know. The correct 201 factory switching points are in the last column. 105/100. 105/120 does not sound right even for a MB part number. If this is the one in the car then you're right, turf it and get the 105/100.

Imagine how hard and long the fan is working to drag it down from 120 to 105.

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1990 300TE

"24 hours in the day. 24 beers in a case. Coincidence? I don't think so."

Hmm, I can't confirm that. But I just did a quick check in the W201 service manual, the wiring diagram for a 1988 2.6 shows a 105/115 switch is used. But for a 1990 2.6, I can't seem to locate any temp switch on the wiring diagram.

That is MB part number, ********A* uses MB Part# in their catalog. When I need a MB part#, I go to their site to get it. Because I don't live in the USA, so can't sign up for the free EPC.

Where are you anyway? I do the same with ********. I'm sure someone will come in with the info but 120 or even 115 seems high for this application...

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1990 300TE

"24 hours in the day. 24 beers in a case. Coincidence? I don't think so."

I updated my info.

I don't want to sideline this thread.

Agreed, even with my dual 100-95°c (clutch fan) & 107-97°c (aux fan) temp/fan switch I think is too high. On a hot summer day with A/C on & stop/go traffic, I find the electro magnetic clutch fan comes on too late & is not effective to bring down the coolant temp at this point, before you know it..the temp on the gauge climbs to 110-115+°c. I don't like it.

With the NEW dual 91-86°c (clutch fan) & 99-94°c (aux fan) temp/fan switch I just installed, with car idling & A/C on...my temp gauge shows 85-95°c (never when above 100°c, bc my aux fan never came on, only my clutch fan was on).

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85' 190E w/collector plates