While changing my oil, I found a black small O-ring inside my oil filter housing. it doesn’t appear to have come off of the standpipe or the anti-drain back valve.
Wondering if it may have come up this way from the engine block or it possibly was inside my oil filter when I installed it?
Any input is appreciated because I don’t necessarily want to change the whole cooler assembly.
*Photos of removed cooler are from a second cooler I have laying around.
