Hi everyone, my son and I just finished replacing timing belt, water pump, oil pump O Ring seal, cam and crank seals on his 1996 Subaru Legacy 2.2. We took the oil pump apart and reassembled. We started it up this afternoon and it ran like a champ. However, there appears to be no oil pressure. The idiot light is on and when I took the oil filter off, it's dry. We ran it for about 3 minutes. Can someone tell me how long it takes for the oil pressure to come up?? Thanks! Jack