Rick's Free Auto Repair Advice

Posts Tagged: spark plug failure

4 common causes of spark plug failure

What are the 4 most common causes of spark plug failure? Improper torque is the #1 cause of spark plug failure NGK reports that over 90% of all early spark plug failures can be traced to improper spark plug torque during installation. I bet you’ve never used a torque wrench to install spark plugs. Even in the days before aluminum cylinder heads DIYers and professional technicians never used a torque wrench when installing spark plugs. But just because they installed and fired up doesn’t mean it wasn’t the cause of … Read More


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