C220 Belt Tensioning Pulley Removal

[Okiebenz]

Anyone with access to a manual for a 1994 C220 (111 Engine)? Need to know if a special tool is necessary to remove the belt tensioning pulley for access to replace the belt damper. I don't have visual access to the vehicle at this writing, but I recall that it appears that the External Torx on the center shaft could be held with a socket while removing the retaining nut with a box end wrench. Anyone done this one?

[TMAllison]

I'm guesing it will be a 8mm hex on the tensioner.

Here is a detail http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=202022&M=111%2E961&GA=722%2E423&GM=717%2E417&CT=M&cat=19K&SID=20&SGR=045&SGN=03

[xvvvz]

You need an external (E10 I believe) torx socket to hold the stud while you loosen the collar bolt that is under the plastic cover. A closed end wrench (10 mm?) that has an angled head (so that it reaches inside the cavity) may be necessary. I have only tightened the collar nut, so I cannot tell you if there is something more difficult to get the pulley fully off.

I bought a set of E torx sockets at Pep Boys for $20. Nicer than the ones sold on Ebay at about the same price once shipping was factored in plus I didn't have to wait. You will want a good set of these for future repairs.

Please post your experiences taking this off. I will be interested to know if you were able to get the plastic cap back on that goes in the center of the pulley.

[Okiebenz]

Thanks for the feedback. The tensioner shaft takes a #10 external torx and I have used that in the past just to move the tensioner in order to replace the belt. Looks like the retaining nut indeed may take a box end with significant offset. I don't recall seeing the plastic cover -- perhaps this one is missing? May be a while before I get to this one. Will report when I do.