Originally Posted by slick rick
Mine turned out to be the Oil Pressure Relief Valve
That's the oil pump bro!
I'd say its the pump as well.
2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.