Decided to change the auxilary tension pulley, which I thought was noisy. Well my interpretation with a large screwdriver on the pulley nut & on my ear. Their is something noisy up the front on start up cold.
The pulley I had got, whilst the correct dimensions did not fit. The chamfer on the edge causing it to jam when fitted to the tensioner. Anyway fitted a new belt & replaced the old pulley, which seemed ok. No noise on finger spin & not over running.
So I would still like to try a new one. The OEM one fitted is from Poland. [Linked Image]

Anyone know where I might find one. I have tried all usual outlets but it would seem the fitting to our sigma engines is odd.

Last edited by IcePack; 07/02/23 06:25 PM.
4/4 Ivory 4.1:1 axle, Mercedes A200 AMG