Just bought the car 3 days ago. Ran seafoam in it and about 5 minutes later the lifters started ticking like crazy and was really loud. Drove the car half a mile and changed the oil, still crazy loud. Try a bottle of valve medic for $1.99 and 20 minutes later the noise is almost gone. Ordered 16 new lifters anyway. Lifter noise went away 95% after 2 days. Today, day 3, installed new lifters along with a new timing belt, front main seal, cam shaft seals, spark plugs and wires, valve cover gasket, timing belt tensioner and idler pulley, water pump, surpentine belt and its tentioner pulley. Car starts up fine but has a lifter ticking noise. I can't hear it while driving at all even with the windows down and I can't hear its at a stop light in traffic. I can't hear it inside the car if the windows are up. But I can hear it when standing next to the car and it speeds up with the engine. Have only driven the car 15 miles with the new lifters, I let it idle for 25 minutes before driving it the first time with the new lifters. How long should this last? Kind of annoying since the old ones were quieter than these right before I changed them.