How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike Your Own Question
Mike, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 417
Experience:  19yrs Automotive and Bus experience. Owner/Operator/Tech of Auto repair facility
Type Your Ford Question Here...
Mike is online now
A new question is answered every 9 seconds

what causes a spark plug to blow?

Customer Question

what causes a spark plug to blow?
Submitted: 7 years ago.
Category: Ford
Expert:  Mike replied 7 years ago.
They come loose a little, then start vibrateing in the threads and over a long period of time the threads wear out and the compression of the cylinder forces the plug out, tearing out the threads also.