I have found that the original 914-4 caps are been superseded by the equivalent 911 cap in the Porsche parts list. Problem is the 911 reservoir it originally belonged on has a breather pipe on it. The 914-4 reservoir does not ,and relies on a breather hole in the cap itself with a small baffle structure on the inside.
See picture below of a 914 cap Part No.91435590500 (not mine!)
Can anyone help ?
I really don't want to have to go to the hassle of changing the reservoir as well given I've just refilled the system with new expensive racing fluid ! but I will need to if I can't find a 914 cap soon.
HELP ?
