I have a 90 teg and just had that replaced because mine was leaking also. To do this you have to take off the valve cover and also take off the first cam bearing. Then this seal comes and and can be replaced. You would need the cam seal and a new valve cover gasket. Not very expensive and easily done yourself if you have the tools and a little know how. I do have a different year car but don't think they are different in this way. Sorry for long post and good luck.
Don't pound it back in will just come out again.