Since I've been reading up on various aftermarket filters, I decided to see what is inside the larger of the two factory oil filters for the 350Z. The bottom came off easily and cleanly with a kitchen can opener. The bypass valve is a spring-loaded diaphram at the top of the filter. Those who know more about filter construction -- please feel free to comment.
Pics Here:

http://www.imagestation.com/picture/...1/fc5e28b3.jpg

http://www.imagestation.com/picture/...f/fc5e2890.jpg


Regards,
Mika

 

mwaller,

This is a very cool post. I thank you for sacrificing your Nissan oil filter for the greater good.





Perhaps we should have a canonical oil filter thread somewhere...

 

Glad you appreciate it. Did you see my other post comparing this filter to the other Nissan filter for the Z (in the general forum)? If not, I suggest you take a look... not only is the other one woefully small, it's also VERY cheaply constructed. If you want to use OEM filters, stick with the larger of the two (pictured above).
Mika

 

small correction: the number of the larger filter is 15208 9E000

 

Oops... sorry.
-Mika