Idler pulley

[MartynE]

I changed the idler tensioner pulley today on my C63s, what a difference, it was squealing like a stabbed pig for about 10 minutes first thing, but even at temperature it's a lot quieter, pig of a job when you have shovel hands

 

[mioba]

Good job.
It should be silent all the time. Did you check the other pulleys when the serpentine belt was off.

 

[MartynE]

Yes mate all others are silent.....

 

[mioba]

Good stuff. Its a rewarding feeling doing these jobs oneself.