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Mike, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 417
Experience:  19yrs Automotive and Bus experience. Owner/Operator/Tech of Auto repair facility
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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.

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