96 4.6L - I just replaced my valve cover gaskets (and grommets) and there appears to be exhaust leaking into my passenger side. Driver's side looks fine. I assumed this was a sign of bad valve seals. However I realized tonight that I have been hearing an exhaust leak on that side and assumed it was the manifold gaskets. So...would that sound be the exhaust leak from bad valves seals or do I potentially have coincidental issues?