5.3 Tick/Knock?

[JPVortex]

What you are seeing is probably within realm of what is normal for a high mileage engine. By no means an example engine, but the bottom end is usually nasty and sludge does end up there, so do metal shavings.

If your oil pressure returns to where it needs to be, you are probably fine.

But I'd want more inputs from the folks here on what color O-ring is used. If i am not mistaken the original O-ring was either a Red or a Blue..... you seeing a green means someone has been in it already (??)

Ok well that’s good to hear, I don’t think the previous owner did many oil changes lol.

And maybe the oring isn’t quite green. Kind of a turquoise color. Definitely hasn’t been opened, pan still had factory rivets.