How do you change a serpentine belt on a Mercury Sable - Ford Taurus?

(This answer Covers the Ford Motor Company Ford Taurus and Mercury Sable with the 3.0L OHV "Vulcan" Engine and the 3.0L DOHC "Duratec" engines.)

Installation notes:

Replace the belt by fitting it around the pulleys and lastly loosening the tension with the tensioner/idler pulley to allow the belt to fit over the last pulley.
  1. Attach a 15mm socket or wrench to the bolt in the middle of the tensioner pulley.
  2. On all 3.0L (OHV) engines, rotate the drive belt tensioner clockwise to relieve belt tension and slide the belt off the pulleys.
  3. On 3.0L (DOHC) engines, rotate the tensioner counter-clockwise to relieve belt tension and slide the belt off the pulleys.

Replace the belt by fitting it around the pulleys and lastly loosening the tension with the tensioner/idler pulley to allow the belt to fit over the last pulley.

Answer

Put a wrench on the (spring loaded) tensioner/ider pulley and take out the tension. You can then remove the belt. Replace the belt by fitting it around the pulleys and lastly loosening the tension with the tensioner/idler pulley to allow the belt to fit over the last pulley.