2002 Ford Explorer Q&A
2002 Ford Explorer Question: hole in right bank valve cover?
Are you missing your oil filler cap? - hemicuda
Is it clean hole or do you mean the cover is cracked/broken? If it looks like the hole is meant to be there, look for a dangling vacuum hose or PCV valve. Is there a grommet on the hole still? Were there any extra noises when it was running? - Andy Y