Stick with your Technican
Brother of The Benz, David
Listen to what your Technican said, the front timing chain cover is a leak area, and the oil pressure regulator seal too.
When the cover gasket is replaced you will get the camshaft and thw crankshaft seals renewed also.
Sounds as if you will have a dry engine up front.
Always coming to my mind is that the crankcase is at minus atmospheric pressure resulting from the controlled orific crankcase ventilator. Could we have the orific restricted, not maintaining the low pressure that is required to keep external leaking at a minimum?
Happy Trails Beep Beep from The Spiderman in Houston!!!