Saw the vid.
OK. Some general stuff...
Stay away from the aftermarket stuff... unless it's OEM (You know... it's the same manufacturer Porsche uses but the parts are ab$ent the ex$pensive Por$che "P").
Next... replace the vent piece with OEM.
Next... replace the vent cap. You already replaced it? Replace it again. OEM. Period.
OK. New vent piece and cap? Next...
Maybe consider a system pressure test... AFTER you replace the two above parts.
OK. Replaced the two parts... had the pressure test done... keep that vent piece closed. Close it.
Fill the reservoir tank and, if you choose to replace that too... go OEM. Quit cheaping out with aftermarket parts.
Report back. Best wishes.
