VarioSpam

Well, on a positive note, everyone (inc me!) is hearing the whining noise from the PDCC pump, but we don't have a single observation of this leading to a failure do we?

Crozzer

gawd I wish I knew this before paying a shop to “fix” this. Not fixed, just a few K bucks lighter. Then I put a few $2 plastic clips in place, fixed the bracket holding the PDCC expansion line, and it got better (not perfect, but better).

driven991.1

Mounts for??

Crozzer

scroll up to:
https://rennlist.com/forums/cayenne-...l#post18535091

basically, if you make sure you have all the rubber grommets holding the bracket for the pdcc expansion loop, and all the plastic clips routing the lines around the a/c compressor etc., the hum should get a lot better.