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C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort (What the heck, it gets 38 mpg!)
Idler pulley
My girl just got her 06 ML back from the shop for power steering pump and the Idler pulley seized!
The pulley that was installed was 2722021019.
Turns out thats the wrong one, if it's before 7/2007.
It's supposed to be, ML 350 Idler Pulley- 0002020919 Bolt for above- 1129900012 Cover- 00019885735
the inside diameter is different, the bolt has a lip that supports the bearing, and the bearing also fits over a protrusion one the water pump, thats not there on later models.
The 2722021019 has a plastic piece that supports the pulley (lame!)
but when you bolt it in to an early ML it pushes the plastic piece to the center of the bearing and nothing supports the bearing.
Looks like this.
when it gets bolted onto the older version water pump, it pushes the back plastic sleeve the the center, and eventually locks it.
So, just an FYI. The shop says they see a lot like that.
They can't figure out why that is.
Last edited by C230 Sport Coup; 10-27-2014 at 04:38 PM.
10-27-2014, 03:03 PM
