Had a friend change the oil on my 1915cc vw engine. Was a VS from Kirk built in 2005. The engine had an oil pan/plate without a plug. When he took the 6 bolts out he had trouble getting the plate/screen off, he said it was like it had be attached with silicone. He replaced it with a plate/screen that had a plug in it, and a new gasket. This is the first time the engine ever had an oil leak. He told me to tighten all the bolts crosswise about a quarter tune. I did this a couple times and all but one bolt tightened up. The one bolt seems to be stripped , so it never gets totally tight, and this seems to be where it is leaking oil.
1. Do I try a new bolt, if its the bolt threads, and not the hole threads?
2. Should I take the plate off and try to re-tap the hole to a larger size?
3. Can I just take the bolt out and re-tap it through the plate, since that hole will probably not fit a larger bolt?
4. If I re-tap the hole, does it still have to be metric since its going to be different than the other holes? Should all the holes be re-tapped, so they are all the same size?
I'm very much a novice here, so don't go all technical on me, please. I will probable borrow a tap and die set from a friend, so I hope it does metric.
Thanks ahead of time, have had the car a year and half now, so this is the first real issue.