Driver's side engine knocking noise

2003 FORD F-150
131,960 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
Avatar
BILBO_MCFAGGINS
  • MEMBER
  • 1 POST
Knocking sound coming from valve cover driver side used my stethoscope to locate it. crisp burning smell. oil turns to black pretty quick. thins out but no coolant and oil mixing! freaking out! changed the spark plugs did an oil change and did not help. Oil pressure has lowered from wheres it is usually at. Which is 3/4 of the way up now it is down to 1/2 or a little below one problem no dipstick. my engine size is a 4.2l 256ci.
Aug 27, 2017 at 9:27 PM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
It sounds like you have spun a rod bearing which would cause all of the symptoms you have described above.

Can you make a video and send us a link so we can confirm the problem?

Please let us know what happens.

Cheers, Ken
Aug 30, 2017 at 11:05 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.