Oil pump cover leak
 

I have a leak at the oil pump cover. I have a new gasket on order. Should I use sealant to prevent future leaks? If so which one?

Not likely the cover. Could be a bolt head though?
In my experience, it is the oil pressure sending unit or the fuel pump "vent".

Had the same issue recently. I used a light coat of RTV after taking a file to the oil pump to remove any high spot.