[Quazzie]

"the dealer will only sell you the complete tensioner assembly for about $180.00. If you have the dealer do the work, you won't get out of the shop for under $300.00."
"pay somebody using my method to fix it for about $100.00"

Surely the peace of mind of knowing that the work on your car was carried out by a professionaly trained lexus mechanic is worth a mere $20.. ($100 for labour plus $180 for the tensioner)

"Clue: The pulley bearing can be pressed out and a new one pressed in, and the bearing is all that is really worn out. Shop for a double-shielded bearing; easily acquired at any of several on-line firms. A little lock-tite on the bolt that holds the pulley onto the tensioner arm, and you're down the road."

When it comes to the belts on a car is it really a good idea to be advising home made remedies.. ask yourself how much a new block costs if the engine seizes..