Doubt that lifters break in, if it is noisy it has air in it and needs to be relieved by grooving the pusher as per Dave's depiction. Hydraulic lifters seldom cause any problem and usually never need replacing unless they have been damaged by improper preload.


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration