1992 Saturn SL1 oil to top of engine problem!

I have a 1992 saturn sl1, and[u:a6957298b0] I have replaced the oil pump [/u:a6957298b0]and checked the oil pressure relieve valve =(I used a pry bar to pop it out), and the valve is good. I checked the 'o'-rings and they look good. And I put it all back together and it still ticks.
I took it to a saturn dealer! And they said it was not getting a oil pressure reading. And that they would charge me $550.00 to check it out more. By dropping the oil pan and removeing the front cover.
after what I told them what I replaced and checked. So is it likely a pluged oil passage? Or would it be a 'o'-ring problem. Or would it be the
crank shaft seal. I also took it out, used a srcew=driver to remove it, it looked a little worn.[/B]