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I have an '05 Boxster, 109K miles, purchased in March this year. The car runs great and is in remarkable shape. I noticed the paint chipping on the welded plate where the decals for the oil and coolant re. Closer, I noticed coolant condensation on the plate. Under the plastic base palet, more condensation. I had initially thought this was the cap but removing it when cold it still had pressure. I suspect the pressure relief valve now. Would opening it possibly clear any obstruction or is that inviting more leaks? Anything to clean here besides the residue? Film on plate
Last edited by ClemCLone; 08-08-2021 at 01:32 PM.
Reason: added pics
I also have a 2005 BS and I discovered that the pressure relief valve was leaking when the cooling system would not hold enough vacuum when I attempted to use a vacuum refill tool to replace the coolant. I recommend using a coolant pressure tester to confirm where the coolant may be leaking.
Thanks, I will try that. I had relieved the pressure when cold, cycled the relief valve, ran the car to hot and for now, it's not leaking. LOL, your leaks looked a lot like mine.