I think you might have to go to a garage to get the pressure tested, you may be able to buy something, have to have a look around. However if you haven't got a splash sheild in your cam cover(i'm sure 16v hasn't), leave the car overnight, take the oil cap off, start the car and see how quick the oil flows at the top of the cylinder head. It should come up very quickly. Another thing to try is to take off your oil cooler and clean it out, it may be clogged up.