Will a "Heli-Coil" come out if I replace the spark plugs?
I drive a 2003 Mustang GT and about 2 years ago spit a spark plug. I brought it back to the dealer under warranty where they did a heli coil. (Looking back at it, I wish they replaced the heads instead). But my question is; if I go to do a tune up on the car, is there a huge chance that the heli coil will come out when I take the spark plug out?