SCarterMusic

well I just noticed this loud sound seems like it's from the pulley on the left side of motor. it is below freezing outside now, not sure if that's a variable.

what if this pulley, any tips or help on what to do?

Thabks to you all for always being a great forum and helping out here is a link to video clip.

hayseed

iTrader: (2)

take off the outer SC belt and see if it still makes the knocking sound - it only take a minute to remove it ..

latemodel21

To be safe, you should take a close look at the front of your supercharger pulley and see if one of the springs has broken (before you run the engine any more).

happy holidays,
Chris

latemodel21

relative to what to do if it is the front 8-rib idler, the bearing is replaceable (less than $10 last time I bought one) however, sometimes there is play in the bearing housing (that replacing the bearing does not solve completely) so a replacement may be in order.

here is a thread with that covers this pulley
https://mbworld.org/forums/w211-amg/...ng-repair.html


I only mentioned checking your SC pulley springs as the sound in the video sounds more like a slapping sound than a bearing sound to me.

hope that helps,
Chris

bbirdwell

Part numbers here:
http://www.benzworld.org/forums/w211...y-replace.html