Originally Posted by jonnyb
Got the NAPA filter, replaced the filter and o-rings, topped it off with Mobil 1 0W-40, started it up and there were no leaks. So then I washed it all down and cleaned all the oil up and all seems well.
The top o-ring was in the correct place, but it was squished and completely flat. I really don't understand how that happened. If the seal was too small and flat from the start, how did it seal for a thousand miles?
Jon
This is most commonly the cause of the catastrophic oil leak, and is due to some dope over-tightening the oil filter body when reassembling. The body should be hand-tightened, only, so as not to overly compress the top O-ring.
After a time or two of changing the oil yourself you will be able to 'feel' the 'just-right' degree of resistance necessary to properly seal the filter assembly without crushing the rubber O-ring..
Good luck.