Hey, need some harley gurus input. First, i have a 78 shovelhead, with solid lifters, and non-adjustable pushrods. The front exhaust lifter, after setting zero lash, now has a pressurized oil leak. It its confusing me because the last time i adjusted them, there was no problem w/ oil leaks. I understand they originally had hydraulic lifters, buy why is there all the sudden a problem?