Serpentine belt issue
#1
Serpentine belt issue
Ok need some help guys. My serpentine belt keeps derailing and I'm clueless as to why. I've replaced the tensioner and water pump. And all the other pullies move freely like they should and nothing is leaking on the belt to cause it to slip... what else could it be?
#2
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 754
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
While the eng. is running, look at Crankshaft Pulley from a side view and see if it wobbles.
Contrary to popular belief, pulleys are not supposed to free-wheel when spun manually. There is supposed to be resistance w/o noise. Remove the belt and spin the idler pulley by hand. If it free-wheels, with or without noise, replace it.
#4
Super Member
Joined: Sep 2015
Posts: 639
Likes: 36
From: Cleveland OHIO
01 ML55AMG 04 ML500 03 ML350 08 ML63AMG
What if you replace the belt, maybe belt is stretched out??? Check if your all ur bolts if they are tight , on steering pump alternator tensioner idler.
#6
Super Member
Joined: Sep 2015
Posts: 639
Likes: 36
From: Cleveland OHIO
01 ML55AMG 04 ML500 03 ML350 08 ML63AMG
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#8
Super Member
Joined: Sep 2015
Posts: 639
Likes: 36
From: Cleveland OHIO
01 ML55AMG 04 ML500 03 ML350 08 ML63AMG
#9
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 754
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Fully remove the belt and re- check every component.