[Wagnertech]

Last week I began to see fine metal shavings in the oil filter housing while doing the oil change. I used a boroscope to look through the valve cover and didn’t see anything obvious. Friend of mine suggested that the rod bearings may be on their way out. I ordered everything from FCP and just finished putting the bearings in. Cleaning out my oil pan. There was a screw in the bottom of the pan that I’ve never seen before. I’m wondering if any of you guys could identify where this may have come from so that I can address and fix it.

Edit: checked with many other techs and conclusion is either my magnet unknowingly had this on it and I grabbed it without paying attention prior to checking pan or we have a mystery on our hands. Either way, will send oil to black stone to see possible metal shaving culprit. Vehicle runs fine

[sabino56]

I don’t have experience with vanos bolts but think I remember reading that some may break off. I don’t know if that matches look of them but you can probably search for threads on that to compare. Good luck!

[TGTIW]

Vanos bolts aren't button head, so it's not that, realize that doesn't help..

[PhaceN52]

Can you post a picture of the old bearings please?
Btw never seen that bolt in the N52...

[Wagnertech]

Here you go

[Phil325i]

Thanks for posting. How many miles on those old bearings out of interest?

[Wagnertech]

Originally Posted by Phil325i

Thanks for posting. How many miles on those old bearings out of interest?

172k