at 101k miles either your a lucky man or most likely the chain has been already replaced earlier.the chains and 4 upper rails are in need of replacement usually at 6ok,like clockwork.Recommend removal of both valve covers for inspection.what happens is the chain stretches and then slaps the chain rails.this can happen at start-up and while driving.rather be safe than sorry,have it checked.rec replace chain tensioner too

[This message has been edited by Webmaster (edited 03-20-2000).]