Hi Ori. clean the lifter outsides and the bores w brake Kleen, blow em dry and lube the bores/outsides lightly w WD40, install them & raise the lifters off of the lobe w your finger then release and see if the lifter falls down onto it's lobe w a resounding "thunk". If not they weren't spinning. Did you take out the inner spring for breakin? (if applicable) What spring pressures.