Do you do alot of idle time?
When you idle diesels they tend to start slobering. That's when oil starts coming out of seals like the valve cover. It's best not to let your truck idle for more then 10min. Any more you can wash a cylinder and you're "wasting" fuel.If idle can't be avoided then have the pto high idle enabled so the fuel and charging system don't get taxed as much.mine is leaking in the exact same spot. and i o a pretty good amount of idling since its cold as here. but i was curious what that leak would have to do with idling?