Thats what I plan to do next, change O ring, But I wonder WHY? The car did not leak about 4 weeks ago. It was standing still for about 4 weeks while I was changing the timing belt. (yeah I'm newbie takes me that long to change timing belt
) My theory is that "Engine Restorer" stuff which I put in might have hardened and clogged the oil filter...? and now there is too much pressure and the old valve leaks.
cirrusblau: The oil drops excatly from where I circled in the picture, from pressure relief valve.