Edit: your* Just finished the first valve adjust on the new to me 64 dart with a 225. Before I did the adjustment the engine was nearly silent when running with a slight tick when hot. I warmed up the engine by driving it around and getting it to operating temperature. Remove valve cover and set to doing the valves by turning the engine over with a starter switch and aligning it to the marks that I've made on the balancer. Marks were made by dividing the balancer circumference and measuring. Now the engine is considerably louder and sounds like a sewing machine. Not clacky just tappy. It doesn't sound bad and drives great it's just much noisier than what it was. When I was doing the valves they were set extremely tight under .010 on all valves. Previous owner said that the engine had a top end done within the last few years, everything under the valve cover looks clean and new. video is taken with the engine at operating temperature.