What is the best way to prep new lifters?

[Rusty Scout]

I seem to be having trouble pumping up my new epwi ha855 lifters. I am doing it by hand with a pushrod submerged in a cup of oil. First I tried using 5w20 oil that I had on hand. After 5 minutes of pumping no bubbles and bottoming out. I tried another one and same result. I tried another one and it gave a steady stream of bubbles on the first stroke. Another steady stream on the second stroke and beginning to pump up. Fully pumped up on the third stroke.

 

[RobertC]

Seems ok to me -- though I have never personally performed the task.

For the "problematic" lifter(s), you might want to check the hole in the side of the lifter to see if it is "obstructed".

I do not know the diameter of the hole...

 

[Rusty Scout]

Nevermind, I finally found a technique for pumping up lifters on the bench that won't pump up easily in a cup of oil. I found that laying them on their sides for a soak in mineral spirits that they would begin to release bubbles on their own. Then I would shake them one at a time and soak them again on their sides and more bubbles came out. I repeated these steps a few times. Then I would very slowly apply even pressure with a pushrod and hold. Some of them would release a nice steady stream of bubbles after just a few slowww plunges. Some took a little longer and I just repeated the earlier steps a few more times. All lifters on the bench that I thought would not pump up did.