Me Again wrote:
I believe you are wrong about the oil path. Chris
"OPERATION
A gerotor style oil pump draws oil from the crankcase through the suction tube and delivers it through the block where it enters the oil cooler cover and pressure regulator valve. When oil pressure exceeds 517 kPa (75 PSI), the valve opens exposing the dump port, which routes excess oil back to the oil pump.
"
I believe you mis-read your own evidence. How else can the oil get
through the block except via galleys and passages? I've been inside enough engines to know how an oil pump works.
As for the contaminates that are poured in via the valve cover, if you read the article it explains that those are caught on the outside of the filter, as designed.