To stop a serpentine belt from squealing, check the belt for wear, and replace it if it is damaged. If the damage is minimal, spray the inside of the belt with belt dressing while the engine is running.Continue Reading
Inspect the appearance of the belt, and look for signs of severe tearing. Insert the narrow end of a belt wear tool between the grooves of the belt. Replace the belt if the tool is flush with or below the grooves.
Locate the assembly diagram for the serpentine belt underneath the hood. If your vehicle does not have one, look for it in your repair manual or draw one by hand.
Determine which parts need to be removed to gain access to the serpentine belt, and remove them.
Place the serpentine belt removal tool on the tensioner bolt. Rotate the bolt slightly, and remove the parts of the belt that rest on smooth pulleys.
Turn the bolt again, and remove the rest of the belt.
Use your diagram to install the new belt loosely, and turn the tensioner bolt simultaneously.
Tighten the belt around the crankshaft pulley, followed by the grooved pulleys and ending with the smooth pulleys. Tighten the tensioner to the recommended spec.
Return all removed parts.