There’s some pictures for you. The first is 2 orings, they are the same, but one has been compromised from either oil or possibly coolant. I would go for the oil contamination that has swollen the ring to a jelly like substance. The other one is an oring that has started its journey into the water passage of the head , that’s where they end up, at least the passenger side one. This one is starting to swell and bulge like a bad spinal disc. A little more swelling and movement means coolant dumped