Last Tuesday a problem arose with my truck. I had a meeting across town at one of our sister companies about eleven and got there with no problems. However, on the way back to work a loud clanging knock suddenly reared its ugly head out of my engine compartment. My heart sunk as thoughts of a failing engine filled my brain. I immediately pulled over and attempted to ascertain the exact location and cause of the knock. Without seeing anything obvious and knowing that it was internal anyway and thus I wouldn't be able to "see" anything, I braved the short trip home since I was only a few blocks away. It got home just fine, but made that horrible...