Which technician is correct regarding power steering pump drive belts?

The statement made by Technician B is correct because a loose power steering pump drive belt can indeed cause excessive noise. When a belt is not tightened properly, it may slip on the pulley, leading to a screeching or squealing sound, especially under load when the steering system is engaged. This noise is a clear indicator of a problem with the belt tension and can also lead to inadequate performance of the power steering system, resulting in steering that feels heavy and less responsive.

On the other hand, the assertion that the belts should be tightened as much as possible, as stated by Technician A, is not accurate. Belts should be adjusted to the manufacturer's specifications, as over-tightening can lead to increased wear on both the belt and the components it drives, causing premature failure or damage to the power steering pump or crankshaft. Thus, it's essential to follow proper tensioning guidelines to maintain optimal function and longevity of the belt and the system it operates.