2003 Other Mercury Models Engine Knocking

2003 MERCURY
68,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
TJONES32
  • MEMBER
  • 1 POST
When the car is started it makes a knocking sound.
Aug 15, 2008 at 6:11 AM
Advertisement
Avatar
MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
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 7:40 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.