[Reddy Head]

It turns out the PO replaced a hose connected to the reservoir tank and NEVER INSTALLED CLAMPS!

I found this out by doing diagnostic work myself - which was relatively easy... This begs the question "What did the mechanic I took my car to even do?!" Had they pressurized the system properly it would have been easily apparent, so in other words they completely lied to me, and essentially charged me $250 for a new $25 Coolant Reservoir Cap. Unbelievable.

Well to say I'm pissed off is an understatement, but I'm extremely happy there was no crack in the tank itself. From now on, I am doing 90% of the maintenance and repairs on this vehicle myself.

Thank you for trying to help, I really appreciate it. Happy Boxstering!

UPDATE
03/14/2020

I am here to publicly call my younger self an idiot (I had been off the forum and forgot to update this many many years ago) it did end up being a faulty coolant reservoir and the hose I had "fixed" actually turned out supposed to be as I found it from the factory and required no "fixing". I have no idea how or why but after performing my non-fix - there was no leakage for awhile which lead me to believe I had solved the problem. I do still still feel the mechanics did not do their job because they should have pressure tested the system and would have easily seen the reservoir was faulty.

Over the years I've been very fortunate, the coolant reservoir has literally been the only issue with the car that was not caused by myself (maybe I'll tell that story another time hahaha).