SamPamm

Hey! 2017 GLE 350. It's time to replace the belt tensioner as the belt was tracking to the front edge of the pulley. I ordered an OEM Gates part from a reputable source often recommended on this forum and there seems to be a wobble in the pulley when running, so I took it off and with some finesse you can feel a wee bit of a wobble when moving the pulley laterally. I tried a second Gates tensioner, and there is similar movement. I have not yet installed it. I put the old one back on and there is a slight wobble as well, but the part is 8 years old. Is this normal for Gates, normal for tensioners in general, or are these two new samples just bad parts?

John Ha

You could try contacting Gates directly. Their site has a "contact us" page