those bolts are in the head, not the lifter valley. (coolant flows through the heads, not oil) they will leak both over time. my end lim bolt by the egr, leaks coolant, it looks like its crying when the cars hot. no oil just coolant. the other bolts will leak out a black thin watered down mess into the bolt valleys. like you see in that video.

if you failed to clean the old bolts of their old sealant you may be ok.