Anything I can look for on the engine which will help prove my case and push them to rebuild the motor?

I know someone mentioned the pvc valve. Would that prove anything?

When I went back they claimed they could not find any coolant leak or oil leak. Yet as I described previously coolant was down ...

I did take the car back and they stated they changed the oil pressure sender unit. They first stated they checked the pressure with a mechanical gage then backed off stating the changed the sender and there is no change to the pressure still reading very low almost zero at warm idle.

when I ...

Have a 98 SSE w hich was in need of upper intake gaskets. Finally caved to have it done and went to local Pep Boys. They insisted it be done with their package which supposedly included complete coolant draining and refill and an oil change.

Well three months later I've got an oil pressure issue ...