Some 2010 Ford Fusions and Lincoln MKZs with 3.5-liter engines may emit a grunt-type sound from the power steering system when turning the steering wheel left or right at slow speeds or at a standstill.
Ford reports that the noise typically affects vehicles built from Aug. 1, 2009, through April 28, 2010, and is caused by manufacturing defects in the pressure line between the power steering pump and steering gear.
Replacing the line with an upgraded design, part No. AH6Z-3A719-B, should eliminate the noise immediately.
The new line comes with new copper sealing washers.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].