Rick's Free Auto Repair Advice

Posts Tagged: spark plug failure

Spark plug failure — common causes

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 their eventual failure. … Read More


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