Ok, so I've changed my opti more than I care to talk about, and everytime the same thing happens, the o rings rip. Does anyone know the point of the o rings, do they keep oil in? I had the motor rebuilt, when I bought it it had a spun rod bearing. Is there something inside the cam that causes these to tear or what? I've tried everything knowing they're going to tear, I expect a snug fit but damn lol. At times I wish I had the spline style opti. So basically, do the o rings stop oil from leaking, or is that only the actual seal on timing cover?