Hey that is a great real world example and exactly the kind of thing that we DONT want to happen to us.. When we play musical parts trying to make things "better" for the sake of being different, we sometimes make things worse. Chrysler engineers had thousands of hours, millions of dollars, years of schooling and pretty much had things sorted out. Of course we all accept that the years has seen many improvements in technologies, materials and designs and that in the end is what we are looking for. I have all the specs for the top OD of the valve guides, the specs for the OD of the valve stem and the specs for the desired valve stem seal height, after it is installed to allow for stock and high lift cams. And to your point, if you choose a 'different' seal that was actually intended for another application, and it doesn't have the right spec (too small for the stem) then you get BS problems like them popping off anyway...which was what we were trying to prevent in the first place.Just a quick story. When I first got my TC a couple of years ago the PO had done quite a bit of work, replaced the turbo, head was refurbished, etc. It still smoked after running for a while.
I found that the valve stem seals it had in it were wrong. They were too tight around the valve itself and I swear had a little metal band around them for the boss, but the seal was blue (nitrile?). Anyway, they would stick on the valve and pull up off of the head boss allowing oil under them and into the guide area. I replaced them with standard seals...no problems since.
Thanks so much for sharing and for helping to confirm, that the correct part that gets the job don't is always better than 'bling' for the sake of bling.