I took my Box in for spring maintenance and to inspect a small drip. Tech says it's the valve cover gasket. He said it's not a huge deal and from what i read it's common. It can be done engine in (anyone DIY?) but he recommended to pull it and also do other seals, gaskets, etc... while it's out. '99 2.5 with 6o,ooo miles (96,000km).
What do you think?