Seals on valve cover. Replace cover gasket and four plug seals.
Wednesday, April 1st, 2009 AT 2:32 PM
To add to what Doc said.
They are called tube seals, they seal the spark plug tube from oil in the valve cover.
Remove the valve cover place on a concrete surface, face up, and drive old seals out. Turn cover over and use socket to drive new seals in. Also replace the grommets on outside of valve cover.