I know its an old cherry,but its getting REALY annoying!!I like to think I've hidden the noisey tappet,are they ever cured?? \:D cut a 5 thou groove as per thread from langdons,took the car for a drive fine no noise.noticed a slight chuffing,with a slight 5 1/2 cylinder feel at idle,so did a pressure check,3 & 4 cylinders down to 110psi rest 140 ish \:\( ,found out that inlet lifters have locked up and holding the valves open,back off the adjusters and the rattle returns.any one got any ides.Its a 235 in a 58 sedan and it eats dizzy's but thats another thread..