Car companies often won't fix a problem that they know exists unless they are forced to do so by the Feds even if it is a saftey issue.
Go find any Ford Taurus with the 3.0 liter V6 pushrod motor built from about 95 to 2000 or 2001. If the motor has more then 12,000 miles on it the coolant will have begun to turn brown and sludge like. By the time the motor has 20,000 miles on it the coolant will look like chewing tobacco that has been spit out in a dip cup.
Ford knows abou this problem and will not fix it. Some people have gotten new motors under warranty claims but many people don't know about the problem. Ford won't do a recall and will only handle these cases on an individual warranty basis.
1989 LE Bonne 122,000 miles
Custom Open Element filter system, Strut Tower Brace from 2nd gen bonne
Light Up Pontiac symbol in grill, 16 wheels from newer Bonne/G, performance tires, performance ignition system, Upgraded brakes.