I've never seen this before but my oil pump locked up. THe previous one also did the same thing and I thought it was just a bad pump but the one I replaced it with did the same thing. Now I know I have a problem somewhere that is causing that to repeat. The oil drive gear that is attacked to the flywheel axil and powers the oil pump shears itself to the bone and the oil pump shaft locks. I pulled it out and can't turn it whatsoever. I assume that I have some really bad oil that is passing through the pump and is leaving something behind that jams it up. Has anyone had this problem before and how did they fix it?