So under my oil filter I find this. Here is the big question though. Is the feed to the filter from the center where the filter screws on, or does it feed from the outside in? Because it was in the outside part of the pedistol. I don't know if it dropped in or if the oil ring in the front cover squeesed out. The stock oil pressure gauge shows 5psi at 900 idle 45 at cruise and just over 60 at throttle. Its a s5 engine so it had the teflon ring around the rubber one, so I must assume it fell under the filter last oil change. GAWD I hope so... There weren't any copper shavings in the oil so it should be okay, right... i don't know though it almost seems to be too big to be the oil ring. here's another pic. and oil pressure seems okay i mean it's low, but that's the stock gauge I'm going by here. I seem to remember the oil ring to be smaller.

http://www.mazdatrix.com/faq/oring.htm



Also there was no copper in the oil and I's expect that if there was low oil pressure.

it almost looks like one of the oil rings that sit around the dowel pins.

It looks like the o-ring on the front cover. The teflon ring, if it has one, is probably what kept the engine from locking up.



Oil flows from outside in.

Maybe someone played a prank?



I have a hard time believing that an O-ring got sucked into a pressurized oil passage, then passed through the oil cooler. I say got sucked into the passage because if it had been blown out of the passage and fell into the oil pan, it would have to get through the oil pickup screen and the oil pump. Not bloody likely on both counts.



It does look like a dowel pin O-ring, as extremely unlikely as it is. The O-ring at the front cover is smaller, as are the oil pedestal O-rings.



A thought: What brand of filter are you using? Could the O-ring possibly have come from a valve inside the filter?

Somebody at Mazdatrix once said that it is possible for the front cover o-ring to end up in the filter pedestal. I'm more inclined to believe him now.

If that's the front cover o-ring, and I suspect it is, if it's sheared from bad assembly it will drop into the oil pan. I've seen this a few times. Been there, done it on mine on accident once. https://www.nopistons.com/forums/pub...IR#>/smile.gif



B

I hear stuff like that happens quite often at dealerships.





I would take the engine apart if I were you.

it wasn't in the oil pan though. it was on th filter pedistol. Does anyonw know the size if the rubber o ring inside the teflon ring so I can measure it for sure and know.

I don't know the size, but I do know it's smaller than the oil filter pedestal o-rings. Yours isn't leaking, is it?

Good point jeff it is a little bit, but nothing more than any other rx I've had I guess I could check that first.