Reusing lifters

Well one thing to think about that blows the ‘groove’ theory out of the water. The cam turns on one axis the lifter spins-slide on another, two opposite motions. They’re not like gears that turn precisely with each other, there some sliding which makes a pattern impossible. With a thin film of oil between them. No oil= metal to metal both will wear out FAST. Now a crank turning can make corresponding marks in the bearing and crank, same axis. Pressure forces the oil off of the surfaces so the excess spring pressures could very well be the culprit.