agreed. i've got my fingers crossed its a loose pulley, or even better that it was my imagination when watching it idle... maybe just the bad tensioner causing the belt to slap around excessively.

i would think that busted front main bearings would have all sort of other symtoms like terrible noises, leaking oil, etc...

does the pulley hold the oil seals in place on these trucks? if so, i should probably pull the pulley and inspect everythign behind it rather than just re-tightening.

i had a late 90's subaru that the main pulley actually fell off - had some work done at a shop and i think they forgot to tighten it. or didnt torque it correctly. once the pulley fell off, the oil seal followed immediately, and shot all the oil right out the front of the motor. ...just as i was pulling out of the tolls on the Atlantic City Expressway. i fogged the expressway for about a half mile behind me before i wondered what the haze on my rear window was.