Clackity-clack on cold start-up
 

2000 4.4 with 125k. Sometimes, not all the time, on a cold start-up I get a lot of clackity-clack lifter noise for about a second. My indy says don't worry, it's just the oil pick-up delay. My Hungarian mechanic friend says its because the indy put in a non-OEM oil filter the last change which does not have the little gizmo that prevents all of the oil from draining all back into the lower pan. Any opinions on who is correct?

OEM parts every time.

I have the same issue, but I have always used BMW filters and still do. That said it is certainly an issue with getting the oil to a specific location rapidly on startup. I may have my dealership check into this, but if anyone else has some info that would be great.