Victim is a 1991 legacy, 195K on the ej22, automatic transmission that just got replaced.
I resealed the engine while I had it out, except the oil pan since it wasnt leaking.
Plugged everything back in, drivers side HLA's got quiet fast, passenger side stayed loud for a while, oil light flickered and acted weird. Next morning, all lifters were quiet, sounded beautiful, still weird on and off oil pressure light, mostly on at low RPMs. I read that a bad oil filter can produce those symptoms, so I got a nice Bosch unit, changed the oil, installed the nice oil filter, and fired up the engine again.
Now, with the high quality oil filter on, the oil pressure light was on solidly, and the lifters that had been quiet started ticking.
I checked on here, and most people said to check the pickup screen, so I removed the oil pan, and the pickup is perfectly clear.
So now I'm feeling tired and stuck. I'd love to hear your ideas.