[white944cup]

When I did mine, I had good oil pressure at first, but when I started it the next day, the oil light came on and the gage showed no oil pressure. After verifying the pressure sender connections, I removed the 3 piece OPRV and found some minor lateral scoring in the "in-out" direction on the outside surface of the plug which suggested that the plug might be binding in the bore. I noticed that the plug also had a pretty sharp edge (no radius) on the outside corners. I polished the OD of the plug by chucking it in a drill motor and polishing with progressively finer sandpaper and scotchbrite until I had removed all the score marks and obtained a mirror finish. Then I put a nice full radius on the corners with a file and polished those too. I greased it well, reassembled, and re-verified the alignment with the special tool. Started it up and the oil pressure was once again great. Good luck.