Why not just replace the damaged rubber? Easy to do, I have done it many times. Also, why not clean all crud out of spark plug recesses before removing old plugs? All the crap just falls into the combustion chambers if you dont, a quick suck with a workshop vacuum would have sufficed. Anyway, watching this video confirms that I am better doing these jobs myself. Job will be done properly, and no waste of money on parts not required.
