front or rear of the lim. the ends need silicon where the gaskets meet. the leak may be coming from the V of the engine.
Is it driver or passenger side?
If not my guess is valve cover.
Well a few weeks ago I took some cleaner and hose to my engine bay (engine had not been turned on for 15+ hours).
I cleaned a bunch of areas which has large amounts of gunk/oil builed up. It would greatly help if I have pictures though.
On the passenger side, the tip of the V appears to be alright.
One thing that I have always noticed is near the valve covers, there are oil pools on the S/C. They have always been there and I wasnt able to get them out with the hose.
I have not looked closely at the driver side. But for the most part I think the pools on the bottom of the S/C could be the culprit.