986 Forum - The Community for Porsche Boxster & Cayman Owners

- Boxster General Discussions (http://986forum.com/forums/boxster-general-discussions/)

- - Changing the coolant breather valve (http://986forum.com/forums/boxster-general-discussions/27782-changing-coolant-breather-valve.html)

It is very difficult to get all of the air out of the system after opening it. My guess is you still need to purge the system. Use the search function and or Pelican Parts for some DIY guidance.

O rings underneath

You must pry (carefully) the top off, you only have half of it off right now....the O rings are under. Take notice to the orientation as it is asymmetrical. I just did this job on my car and my O rings looked fine, but after replacing my O rings with new ones it stopped leaking. Make sure you get the exact O rings and don't just come close with these.

look at this diagram, you can see the two different size O rings under the part you still have in;

http://cdn6.pelicanparts.com/catalog...9610629706.jpg

Dwight