If the belt is too loose or too tight, the problem likely lies with one of the following:
* Failed Tensioner: The most common cause of belt issues is a failing tensioner. The tensioner pulley may be seized, worn, or the spring inside is broken. This requires replacing the tensioner.
* Worn Belt: A worn or glazed belt will slip, even with proper tension. Replace the belt if it's cracked, frayed, or shows significant glazing.
* Pulley Problems: Worn or damaged pulleys on the alternator, power steering pump, or air conditioning compressor will cause the belt to slip or squeak. Inspect all pulleys for damage.
* Incorrect Routing: Ensure the belt is routed correctly over all the pulleys. Consult your owner's manual or a repair manual for the proper routing diagram.
To address a loose or tight serpentine belt on your 1998 Ford Taurus 3.0L V6:
1. Inspect the belt: Look for cracks, fraying, or glazing. Replace it if damaged.
2. Inspect the tensioner: Check the tensioner pulley for free movement. If it's stiff, seized, or makes unusual noises, it needs replacement.
3. Inspect the pulleys: Carefully inspect all the pulleys the belt contacts for damage, wear, or binding.
4. Verify belt routing: Confirm the belt is correctly routed.
5. Replace parts as needed: If any of the above inspections reveal problems, replace the faulty component(s) – belt, tensioner, or pulleys. This usually requires specialized tools and some mechanical knowledge.
If you're not comfortable performing these tasks yourself, it's best to take your Taurus to a qualified mechanic. Attempting repairs without the proper knowledge and tools can lead to further damage.
