I previously asked a question about detecting an.

I previously asked a question about detecting an oil leak, and I received an answer. I narrowed down the problem: the leak occurs only immediately after or while warming engine. I looked around the valve cover and the timing belt cover, but I didn't see any wetness. I checked behind the oil pan ( Laying down in the front of car), and felt wetness at the seam where the valve cover is bolted to the block. So I suspect that it required a new pan gasket. But I need your professional input. Thank you.