Good day all!

So, I had to get the cap off in order to see the valves inside... I'm not entirely positive if this is a pressure loop thing or a dedicated oil supply to the oil squirters if the pressure is high enough... I'll explain in a few... I don't have a 16mm allen bit socket, so I had to find something that fit... Oddly, I did... This is what I found that worked... It is an alt belt tensioner arm for my 2001 540i... I got it with the block I pulled from the pull-it-yard... It worked great!! Lots of light taps...







Here are the valves...





And this is the only thing I can see as to why this is even here...



This goes to the small tube and bypasses the filter...



Filter side... flow-in the center, flow-out on the lower left of the picture...



Out...



So, there is the break-down of the oil pump...

Cheers for now... UPS should have my stuff here by this weekend... It will have to wait till Monday...