Can hydraulic lifters knock?
Can hydraulic lifters knock? A car lifter refers to your car's hydraulic valve lifter. It's a small cylinder attached to your car's hydraulic valve by a rod called a rocker arm. The system works well, except when it doesn't. A phenomenon can occur called lifter tick, where the lifter itself makes an irritating ticking or tapping noise. How does a hydraulic lifter work on an engine? The pushrods actuate the rocker arms, which open the valves. Hydraulic lifters allow the valve lift to increase with engine rpm by filling up with oil as the oil pressure rises. The oil inside...