Hi Stuart and thanks for the reply. Changed the oil and filter as I though that it might be a lifter problem. Didn't help though. The noise seems to me to be up high and not down by the side plate, when I check it with the mechanics stethescope. It's a metallic clicking noise as if the rocker is "smacking" the valve. No missing, so I don't think it's a bent valve. I am out of ideas, unless the rocker arm is not adjusted properly. Shep