Forum Discussion
427435
Jun 21, 2013Explorer
While someone not being careful and taking the time to let a penetrant to soak can cause problems when changing a plug, I've also had issues with leaving plugs in for 80,000+ miles (and many years). Galvanic corrosion will freeze the plug to the head (especially with a steel plug in an aluminum head) The threads in the aluminum head will be stripped out when the necessary force is applied to unscrew the plug.
If you do wait, be prepared to find a patient mechanic that will let the penetrant work for a long time and to use a torque wrench when REMOVING the plugs. If the plug doesn't break loose at a reasonable torque, let the penetrant soak longer.
If you do wait, be prepared to find a patient mechanic that will let the penetrant work for a long time and to use a torque wrench when REMOVING the plugs. If the plug doesn't break loose at a reasonable torque, let the penetrant soak longer.
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