The old one leaked, and the rubber o-ring thing was flattened. I replaced with new ACDelco, the rubber o-ring was nice and round. Still get intermittent weeping. I shot these after driving into town and returning. I barely smelled coolant when I got out of the car and shot these pics.
I did read somewhere a guy had multiple new caps, and they all leaked, and he doubled up on the rubber gasket/o-ring I think, and that stopped it.
Is it possible to over tighten by hand? It's a very strange cap, maybe all modern ones are like it. I'm used to the old school, where there's a stopping point... I guess those old school are metal caps and metal tops.
I did read somewhere a guy had multiple new caps, and they all leaked, and he doubled up on the rubber gasket/o-ring I think, and that stopped it.
Is it possible to over tighten by hand? It's a very strange cap, maybe all modern ones are like it. I'm used to the old school, where there's a stopping point... I guess those old school are metal caps and metal tops.