Re: Can too much oil pressure cause problems with hydraulic lifters??
yeah, the oil would have to act on the plunger like a hydraulic ram. the area of the plunger is a tiny fraction of a square inch. Also, you're working against the pressure of the valve spring multiplied by the rocker arm ratio.
looks like the area of the end of the plunger might be about .1 sq. in. so if you had a 100 lb valve spring x 1.5 ratio = 150lbs/sq in pressure on the pushrod. you'd be looking at 1500 lbs oil pressure to move the plunger in the lifter body. Doubt if it's going to be a big issue anytime soon.
WARNING: round numbers, estimates, possibly un-warranted assumptions, professional on a closed course, don't try this at home, IMHO, YMMV, all that jazz. but it's at least in the ball park.
Tom Terrific or Terrible Tom, depending on the phase of the moon, passing cosmic rays or other factors not fully understood except by my wife.