Porsche Repair Questions? Ask a Mechanic for Answers ASAP
I want to help you but it sounds like you have this under control for the most part except the noise is still there. If you have gone to the trouble of using a borescope I know it must be driving you crazy. Have you taken the door panel off? Can you maybe take a high res video and upload it to youtube so I can hear this noise? I would normally ask for the obvious items like has the door check been inspected and eliminated as the culprit. Sometimes those fasteners can get loose. Or have you loosened the fasteners and retorqued them for the door check?
Congratulations on finding it. I do know what it feels like to get beat up
I have to close this request so congrats and so long. I am a longtime dealer tech so if you ever need future help feel free to request me