Quote:
Originally Posted by GB SISSON
At one point I was doing some searching here on threads about adjustable lifters. In one search attempt wording I came up with 124 threads on Fordbarn on the sublect. Average number of posts on those 124 threads was 17. The majority were about the lifters not keeping their adjustment, followed by wear on the bottoms. Most of the problems involved new offshore products, but even the old hollow Johnsons will lose the interference fit of their screw thread with too many adjustments on them. I bought 2 sets of used Johnsons at swap meets and have been experimenting with jamb nuts and other cures.
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Simple cure for loose adjusters on original Johnsons is to screw the adjuster all the way in and place the lifter in a vise horizontally and give them a light squeeze and check. If still loose, a little harder squeeze. That should fix it.
I've never heard of original Johnson's having insufficient or incorrect hardness, but never assume never I guess.
There was a run of import lifters that were pure junk unfortunately.