Stupid question of the hour ...
 

If I remove the coolant top and hear a hiss (on a cold automobile) does that mean it has to be pressurized/vacuum again? That's all I did. I swear.

Thanks!

It should naturally do that.

is a little condensation normal? It looks like they 'plan' for it by having a rubber seal close around it .... ?

I'd be concerned that you have a snake in your Boxster.

Mine got quite a few and I'm quite happy with it. The top/trunk matting seal revels it is normal and expected (as per design). I know nothing about porsche coolant, just glad 'some' of the pressure can escape somewhere I can trace back and keep an eye on from time to time

Lol!! Yeah. I guy's gotta to draw the line somewhere.
Thanks for the clarification, All:)

First couple weeks of Boxster ownership had condensation in trunk...no issues anymore. Owned about two years now.

Make sure you have the newest PN cap. It stops the condensation.

I have the original cap. Does Pelican sell the replacement?

Yep. Local P dealer should have it too. Cheap part.

If you have condensation, you likely have a bad/crossthreaded cap or vent valve seal issues.

both easy cheap fixes

On other cars I've had, pressure escaping out the cooling system when opened *stone cold* is a sign of a head gasket leak.

Not sure why a water cooled Porsche engine would be any different, but if so, perhaps someone can explain the physics involved.