Originally Posted by
PMK
As you likely know from reading your owners guide, the 2018 per the manual, the belt is not allowed to touch either front flange. Not sure where the 2mm you mention came from.
On the 2014 RT series, the owners guide allowed the belt to contact one pulley flange, but required a bit of math and measuring to validate the belt tracking position. With little effort, I was able to get our 2014 belt to track essentially on the center of the front pulley and have no belt rub on the rear pulley flange.
Either your shop is not accomplishing the task correctly, possibly your engine is not aligned properly, or if you installed a tensione, maybe the tensior is guiding the belt into poor alignment.
If it matters, no tensioning device on our 2014 and runs the lower belt tension per the TSB to avoid vibrations.