Hi everyone, Im a newbie to the site, from Toledo Ohio. Ive been a long time Toyota (and Chrysler) owner, and wanted to see if any of you have experienced this problem. Ive got an 88 Toyota 4x4 pickup, which has ran strong with little trouble for 204,000 miles, but in the last year has developed a rattle in the engine when cold. Im a Chrysler mechanic by trade, and have never had a reason to tear my 22re apart. I have changed the oil every 5,000 and adjusted the valves, etc, since new. Especially in the winter, when I take off out of the driveway and go to shift gears at higher RPMs, I get a loud rapping sound. It goes away after she gets warm, and it runs perfect, as always. Its came to the point I let it warm up for 25 minutes everyday before leaving. By opening the hood when cold, and revving the engine, I can hear it in the top end. I replaced the valve cover gasket this summer, took a quick look at the timing chain, and it looked good. I am considering a new engine for her next year, but if someone here has had this problem and its not too much of a fix, I will do it and get a few more thousand miles out of it. Thanks for your help.