Boot PullerEngine heat glues the boot to the spark plug, and when you yank on the plug wire to remove it, the connector is ripped out of the core and leaves the terminal hanging on the tip of the plug. Solve this and third-degree burns with a plug boot puller. This one is from Theaton Tools using PN 334 or just ask the Snap-on guy. He sold us this one many years ago. We also like to add a little MSD Spark Guard dielectric grease to the inside of the plug boot.