This car had some 156000 miles on it, could see some oil stain around valve cover and engine block area.
Removed the spark plugs, the connected rubber tube, and the PCV valve, unscrewed 5 bolts which hold down the cover, since it had never been opened, so it was hard to come off, used a flat screw driver to carefully pry along the seam until it loosened up, took it off. Then used the tabs to pull out the gasket
Used a very thin and small flat screw driver to shim in tube seal and the valve cover, pried it off the tube, then used a pair of pliers to pull it out, repeated for all four seals. Wiped clean the walls of tubes for new ones to be put in.
Used a big enough socket to hammer new seals into places, then replaced items back in order, when tightening up those 5 bolts, it took a little time to fit, just be patient.
Always get parts from dealer, this way you save a lot of trouble down the road.