question....need an answer..

[daweasel]

Replace the serp belt, was a little noisey. also replace the dead man pulley and the self adjuster, as was a little loosy, goosy.
now has a squeak when starts up, but dies off when heated up.
What's up with that?
I was told it could be the harmonic balancer, but how to tell, that is not an easy job.

 

[Squirrelmaster]

So you replaced the idler pulley as well as the tensioner and tensioner pulley? If the engine makes noise while idling, try starting it with the hood up and see if you can identify a region where the noise is coming from. Keep in mind it could also be the belt itself, as not all are made equal, and some brands just seem to make noise. Try tossing the old belt back on and see if the noise persists; if so move on to the next item, if not, replace the belt with a different brand of belt. Just go step by step eliminating one thing at a time. Best of luck .

Tom