Cobradad Have you changed the
oil lately? Different brand or different weight?The other thing is doing a lash check on the rockers for clearance. You also want to keep a GOOD eye on this noise. It could be the begining of the camshaft ot lifters going bad. Driving the car at speeds is great for lubing all the parts. At idle you are not getting the same spray in the motor. If the motor has a windage tray you are getting even less. I will see Bill at the cobra meeting today at washingtons crossing in PA. Come on down if you have the time. Rick L.