Weird sound at warm idle...wth is this?
Any light you guys can shed on this is appreciated!
Like i said -- it comes and goes.. i hadnt heard it before...so weird
Last edited by doncmleon; Sep 18, 2020 at 01:07 PM.
My 2012 has JUST under 60k miles, so I know it's time to replace all of them along with the belt.
Thank you a thousand man!
Trending Topics




My hearing is shot so it's difficult to tell where the noise is coming from, I hope it's not a camshaft adjuster or lifters, but I won't know until I check. I really don't feel like pulling off the valve cover, but I probably should.
The Best of Mercedes & AMG
I don't hear lifter tap...normal big V8 music is what im hearing in your video....
edit - at the VERY end I hear something, but i cant make it out..
My hearing is shot so it's difficult to tell where the noise is coming from, I hope it's not a camshaft adjuster or lifters, but I won't know until I check. I really don't feel like pulling off the valve cover, but I probably should.
https://www.youtube.com/watch?v=DJhoLdF8Xss








Might be worth looking into further
https://www.fcpeuro.com/Mercedes~Ben...eywords=517654
Having my shop install it tmrw morning. They said its about a 3 hr job.
Just replaced all pullies and belt tensioner. Torqued to spec 20Nm and 30Nm respectively.
It’s a whirring sound which seems like a bearing but everything is new. Odds I got a bad new pulley? These are from FCP Euro so I’ll replace for free if have too.
https://www.fcpeuro.com/Mercedes~Ben...eywords=517654
Having my shop install it tmrw morning. They said its about a 3 hr job.







