I made it 200 miles before something happened to the engine. Has a odd, squeaky, rattly buzzy sort of sound. Almost like a loose metal cover rattling. Makes the whole car vibrate bad at idle. Sounds better with high rpms. It is getting louder little by little. Seems the idle was getting more labored, as it was struggling. So I made it home, ran a little slower- but not by much. Me thinks it is coming from the lower case area(crank bearings ready to blow..) First thing I checked was to un hook the Alternator, and fan- sound still there! Took off the metal shrouds, still the same. Each time I started it , it got worse.... Started to investigate further, popped off #2. The base nuts were loose, but not #1? The piston, bearing, pin looks fine. The crank spins normally by hand. I can't really feel any problems on the bottom of the rod end. Any ideas? I have another engine, that I may very well have to reseal, and use the top half from this one.