N52 Exhaust cam ledge/box issue

[80stech]

I'm starting to think a little more about trying to solve the lifter tick on my N52. By the way it's acting I am pretty sure it's a problem with loss of oiling due to the cam/ledge wear. There is some Chinesium replacement parts at a fraction of the price that look like they might even be an option if needed. If they are up there on quality with the metal valve covers then could be a good deal. Anyone have any experience either way with the cam ledge/box seal ring wear issue ??