I agree with Tony (although he may exaggerate just a wee bit for effect sometimes), the damper pulley on the 228 had been loose for a while and I thought the noise was from a bad water pump. Well I changed the water pump. The noise seemed to go away (probably from tightening the fan belt) and the very next weekend, drove across state to pick up a motor. Thats when the damper pulley parted company with the crankshaft and took out the radiator. Autopsy revealed that the pulley and damper were still in one piece, it had been flopping around and chewed up the keyway in the crank to the point where the key finally broke, and the pulley just worked its way off the end. A retaining bolt would have prevented this from ever happening.
My 302 engines are very prone to damper pulleys going loose. I guess the crank harmonics are more of a factor with the bigger motors. The factory recognized this and all 302 cranks are drilled & tapped for a BIG retaining bolt and washer. I have learned to recognize the sound, it's a subtle knock like a rod bearing going out. The bolt still seems tight, but a few more ft/lbs with a cheater bar pulls it down enough to stop the death rattle.
I am convinced that this (and flywheel bolts coming loose) are a message from above that these motors were rated at 3300 RPM and you exceed that at your peril.
