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Does the M45 s/c on a M111Evo 20 have a clutch at all?
I have a 2002 W203 c200K 203k on the clock. The VIN engine designation is M111.955, but also M111EVO E20. Problem: s/c never disengages, and the bypass valve stays open. But, the following article confuses me as to whether the s/c has a clutch at all: Engine Mercedes-Benz M111 E20
I quote:
"M111 Evolution - the next generation of the M111 engine. More than 150 changes were made to the design, it was produced from 2000 to 2002. The engine received the designation М111Evo. Since the Roots compressor was used in the M111 Evo engine, the compressor shaft rotated constantly, only the boost pressure control system underwent complication, which became the source of a large number of failures later. The reasons were both in the wiring and in some nodes (for example, a pressure control valve, a throttle valve)."
the M62 supercharger was replaced by an Eaton M45 with permanent drive (without electromagnetic clutch).
A frienly bump... more of a little nudge Any information that can help, please, even if it is to call me a noob playing with stuff he does not understand. But my next step will be to get the supercharger off and start looking for that clutch, because IF it exists, it is broken. So, a little help, please?
I can add: with the belt off, I can turn the whole s/c with my hands, and no strange grinding noises is apparent. But I cannot turn the snout of the supercharger on its own; it turns with the whole shebang or it does not turn at all. Thus my conclusion that if there IS a clutch, it is screwed.
Thanks
Have you tried posting the question in the W203 section of the forum? This site does not have a lot of cross-section viewership, unfortunately. Platform people seem to stick with their platforms.
I did some searching and didn't come up with anything definitive. Looks like no clutch to me.
If it does, it's on the external pulley and fairly obvious. If it looks like a fixed idler pulley, no clutch. If it looks like an a/c compressor pulley, has a plug coming out of it, there's a clutch. There is nothing internal in the blower.
Thank you, guys. This is the closest image I find to my sc pulley: (obviously without the porting, etc.)
chassis, I did post on W203 thread under "2002 c200k S/c and bypass flap error. Plse confirm parts via VIN."
I confirmed the VIN info: Engine is indeed 111955, but also has a M111 E20 EVO designation and production 2002-05-27, which probably makes that article relevant to this car.
Is that your pulley? Can you take 4-6 close up, clearly focused and well-lit photos of your pulley from multiple angles? The photo you posted looks like no clutch. How long have you owned this vehicle?
Hey, chassis, I am sorry I did not see your post. I have not removed the serpentine belt yet, so I cannot get a very clear picture of the pulley, I will get there eventually, but for now: that seems to be exactly the same pulley from what I can see - the connection that holds the pulley is a bit elongated, like in the pic.
But in the meantime I have discovered that my car was overfilled with engine oil - every pipe, valve, MAF, throttle body seemed to have some oil in it. So, I spent the whole night cleaning what I could. I had MAF cleaner, throttle body cleaner, contact cleaner at hand, so I followed different online instructions carefully, removing each part, cleaning as per example... but after putting everything back, I have a car that will barely idle with very strong smell of gasoline out of the exhaust. So now I first have to solve that problem. Yeah, I am throwing a bit of a tantrum, Please excuse me, and thank you for your interest and reply.
03-24-2021, 12:45 PM
Any information that can help, please, even if it is to call me a noob playing with stuff he does not understand. But my next step will be to get the supercharger off and start looking for that clutch, because IF it exists, it is broken. So, a little help, please?
