Ok guys, this bugger has cost me a lot of work and money. had bad lifter ticking, fixed that. Then oil pressure went to crap. Previous owner told me after i fixed lifters that he had oil pressure issues and changed the filter and they stopped. I doubt that. He was doing autocross in this car, didn't tell me that when i got it. Heres what i have done. New lifters new plugs, wires, intake all done, fuel rail rebuilt. New oil pump new oil pressure switch, new water pump, new timing chain cover since the oil pressure restritcore was scored up. Here is what has happened. Fixed lifters, car rand fine with the exception that the oil pressure dropped to zero when warmed up. changed Oil pressure switch but did not fix the pressure Installed new timing chain cover with oil pump and water pump and Oil pressure restrictor. PRIMED the oil pump with vasoline since it melts fast and lubricates til the oil gets into the pump. New oil. new filter Started it up and damn thing started a loud knocking sound. It sounds like rod, but it wasn't knocking to begin with before i changed oil pump. Is there anything else i would be missing on the knocking. I've already spent 600 on fixing it, and if it is going to be a witch i'm just going to pull it and buy the full gaseket set, rings, cambearings and crank kit.