How do hydraulic flat tappet lifters fail?

pishta said
Sure. It's for the web search that finds this....I can show you a set of slant lifters that were concave, and the thing ran great! :D

A slant size will run the the apocalypse... that's not a good example.. Ha, some good info here like always, until some chucklehead confuses right/left (me) and muddies the water. Doh!