All parts are not created equal sometimes, apparently you just got a defective tensioner, it should still be under warranty.
Worn belt or belt that has stretched to the point the tensioner cannot keep the proper tension. The tensioner can also be defective. Replace the belt and the tensioner.
Either the belt is worn out or the tensioner is defective.
This vehcile uses a serpentine belt. The belt tension is set automatically by the tensioner. If the tensioner is stuck and will not apply tension to the belt then it is defective and needs replacing.
You do not tighten a serpentine belt. It has a tensioner that keeps it at the correct tension. If it is loose, either the belt is worn and needs replacing or the tensioner is defective.
Either the belt is worn out, incorrect belt, drive gears are worn, or the tensioner is defective.
If it has a serpentine belt should be done by tensioner unless it is defective
If the belt is loose or squealing then either the belt is worn out and stretched beyond the ability of the tensioner to keep it tight or the tensioner is defective. Replace the belt and check the tensioner for tension and free turning without noise or side play.
how do replace the belt tensioner on a 2006 toyota tundra. please tell me step by step
Loose power steering belt/worn power steering belt/defective belt tensioner.
There is no adjustment. If it will not keep the belt tight then either the belt has stretched to the point it needs replacing or the tensioner is defective and needs replacing.
More than likely the tensioner is defective and needs replacing.
Should have an automatic belt tensioner -perhaps it is defective I don't think there is a belt tensioner. Belt tension is adjusted at the power steering pump bracket and idler pulley assembly.