2003 Other Mercury Models Engine Knocking

2003 MERCURY
68,000 MILES • V8 • 2WD • AUTOMATIC
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TJONES32
  • MEMBER
  • 1 POST
When the car is started it makes a knocking sound.
Aug 15, 2008 at 1:11 PM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
Usually it's a sign that the engine has a bad wrist pin at the top of a piston, or a worn bearing insert at the crank journal.
Aug 15, 2008 at 2:40 PM
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