2015 Touareg Park Brake Shoe Grinding?

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vwtreg

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Backstory: I had a failed rear left Electronic Park Brake actuator which I had replaced. Thanks to some old threads in this forum I was able correctly diagnose it despite two mechanics pursuing the control module or wiring instead of the actuator due to the misleading error. I had a mechanic install it and perform the air gap calibration. They then had some errors but I decided to pick up the vehicle to resolve myself. The errors included the no basic settings error (I suspect they didn't put a battery charger on when performing the settings) so I purchased a HEX-NET and was able to correct all the errors by following the processes mentioned on this forum.

https://forums.ross-tech.com/index.php?threads/30399/page-3

All seemed well. In fact, I still have no errors. However, I noticed a faint grinding sound driving the car which became louder. It looks like it may be the park brake shoes grinding on the rotor. Here is a video of it. There is a particular point in the rotation where it is a bit sticky and obviously grinding somewhere. The rest of the rotation is OK.


It's not the brake pads and I couldn't see any where the dust cover was rubbing. This combined with the fact that the mechanic had to take the shoes on and off, leads me to believe it is the park brake shoes. Has anyone experienced it or can offer any advice before I attack it? Should I perform the grinding in procedure? The old shoes were reused when the actuator was changed so the grinding in procedure wasn't done. I guess the most obvious is to take the rotor off and have a look. I plan to do that once I get the triple square to remove the callipers, but I was just curious for any advice in the meantime. Thanks!
 
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stefdds

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Check the runout on that rotor ("disk") ; I think it may be warped. You can purchase a cheap dial indicator with hardware and vise-grip clamp on Amazon for 60-80 USD.
 
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