shimming hydraulic roller lifters solid

360duster said

so remove the springs to bottom out the plunger in the lifter body? and remove the spring in the internal check valve also?

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Just removing the springs and disc I don't believe will keep it from pumping up. You'll have to do like @Bewy suggested and grind a slot down the side of the plunger, or else it will try to pump up. It might not be enough to interfere with valve adjustment, but I don't like might. lol