I'll get a photo today. I looked and the assembly is all in one piece sitting in there between the radiator and water pump. The fan, clutch, and the pulley are all still in one unit. AND there is no water leaking from the car despite the fan coming off the water pump. Weird

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red

Chris, any damage to the radiator??

Interesting enough I just took of the fan clutch and added viscous fluid yesterday. It sounds as if the bolt came loose and then fell out, it is amazing if there is no damage, definetly check the rad. it must have taken a hit.

I didn't put locktight on that bolt, all I had was the red stuff which I think may to strong for that, this story has definetly made me think about getting the blue stuff and locking that bolt in there.

Good Luck.

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1994 Toyotal Landcruiser 220k (Sold)

1987 300TDT 278K My Addiction (Going Going Gon...)

2001 Volvo V70 (New Ride)

Ok, so you were all thinking like I was, radiator must have taken a hit, but I have checked several times now, thinking I just missed the spot, and nope, it is alright. WOW! What luck and a relief!
I finally got the think figured out also. The 190E 2.6 L engine does not mount the fan and clutch on the water pump as I assumed. It is mounted on what is called the fan clutch bearing bracket or fan cluch flange bracket. Not the water pump you say, well, I was all ready to order it when I checked the radiator again in teh daylight and say the light as it were. Not the water pump, just a bearing bracket and a shaft with a flange for the clutch. SO, I looked again for the bracket, gave up and ordered the rebuilt one from MB dealer for $135. Then about 6 hours later, after it was too late, I found one online for $110. Oh well, better than the MB new part at $240 I guess. AND, no water to leak out or refill when I do the job next week, the bracket replacement does not involve coolant or oil, or gaskets, etc. Just install and repalice fan belt. Which I might add was also not damaged in the bearing failure, very very weird. That fan had to be spinning like crazy when it let go.

ANY ONE know how to determine if the fan cluch is good or bad?

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red

It is hard to take a picture of this area of the engine, but it should work for explaination purposes.

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red

Yesterday, following this good article, I changed the fan clutch on my 1998 W210 E300. Also, I took a few pics of the inside. Here is how it's made:

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W126 1985 300SD TurboDiesel
W164 2009 ML320 BlueTEC (Sold)
W123 1983 240D Stick (Sold)
W210 1998 E300D TurboDiesel (sold)
W124 1993 300D 2.5 Turbo (sold)
2012 GMC 2500 Duramax PickUp
2015 Ram 1500 EcoDiesel PickUp

I left some bolt inside my radiator,I overhauled my radiator by cleaning each tube,I removed the plastic cover on top,when I am to put it back again I used a bolt to prevent the middle of the cover to bent closer to each other,when I finally put selicone and tested for leak the bolt wont come of now after running the car for months I can't find the bolt,is there any danger to the engine?will the bolt go to the pump and distroy it?my car is a 1979 240d please advice me what to do.

How large was the bolt

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1998 W210 diesel (wiped out by a texter)
Baum spring compressor "for rent"

Can someone comment if the center 8mm fan clutch bolt is reverse threaded?
I used the method as described below, locked an allen key into the pulley hold of the water pump, then rotated the 8mm fan clutch bolt using an allen wrench with an extension on the end for torque and no luck. Actually a small piece of the water pump which the allen key was locking against broke off... Water pump is still intact, however I'll be replacing that as well since I'm in it this far with the fan clutch job.

Thanks!

In an earlier post a member answered the question if the fan clutch bolt is reverse threaded... It is not reverse threaded but regular threaded. I successfully removed the bolt by turning the bolt counter clockwise.

Excellent write up and great pictures! Thank you very much.

But will this work on an OM603?

I replaced the serpentine belt & tensioner on my '99 e300d today, thanks to this very helpful thread.

I thought I'd post the pics of the tools I made, just in case it helps someone else later on:

For the 8mm Allen bolt for the cooling fan, I cut a bit off the end of an 8mm Allen key, and welded it to the flattened end of a 2 foot length of steel tube:



To keep the water pump pulley from turning, hacked up some square tube, a couple minutes with the welder:


In use:


Neither one are pretty, but they only took 15 minutes to whip up and made the job a BREEZE.

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Jake
1999 e300d PlantDrive WVO/SVO conversion
**note to self: oil changed at 268k kms**
1990 Toyota 4Runner FrankenDiesel swap

This is exactly the bit of information that I was looking for. I will be replacing my clutch as soon as it arrives. Thanks.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

Just replaced my Serpentine belt and the tension shock. I gotta say Thanks a Bunch you guys. I think I could have done it cold , but I would not have done it so quick and with so little pain and cussing.
Thank you and Thank you.