Join Date: Jul 2010
Location: lincoln Ontario Canada
How steady are your hands? There is a method to re - tap your plug hole while still in the engine bay. Make sure the piston is at bottom of stroke,and coat your heli tap with heavy duty bearing grease. If you have steady hands you can re tap at the right angle for the first 3 turns. After that half a turn then remove,wipe off the grease and replace with fresh grease to make sure no cuttings get inside the combustion chamber and the oil rings.So ,1/2 turn ,clean and re-pack until you have enough threads for your heli-coil.put in your insert,replace the plug and wire ....your good to go!