After running my 1950 235 a couple of times now, I can't figure out where the terrible rattling sound is coming from. It sounded like it was coming from under the valve cover, but nothing looked abnormal, and all the tappets seemed pretty close on adjustment. I still need to set them but the random rattle sounds like something else. Poked all around with a stethoscope, but could not locate where the noise was coming from. Get's louder off idle. This video was it's first start in many years, and other than the noise it runs great. My 4100 has 2300 original miles.

Last edited by 4100 Fire Truck; 03/12/2018 12:19 PM.