harveyf

Porsche 944 Oiling System Explained is one of the most visited articles on my website. Based on my recent experience with the oil pressure relief valve on my 944 track car, I have added new content. It's at the end of the article or just open the article and search on Relief Valve. Enjoy!

https://newhillgarage.com/2013/06/25...tem-explained/

951and944S

To the best of my memory, the first type 1 piece had problems with corrosion which is why it was discontinued.
Changes between 1 piece V1.0 and V2.0 are obvious though, most notably, the green oring groove that lessens the likelyhood of the oring seal falling off the end...

Had to be a year ago when a lot of us were talking about the topic, I pointed out (with pics) that the oil that overcomes the seated valve, ends up back into the pump suction stream, which is even more detrimental due to the small orifice in the face of the valve that is intended to remove compressible entrained air's effect on regulating.
This allows air directly back into the oil pump.

T

Rob-O

curtisr

Canon. Rated.