well gave this a crack today, Number 1 and 2 gave me no problems, but the rest of the coils would NOT come out, after trying for 5min with coil 3 the top of the coil came off with the spring from inside still attached, and the body was still down the shaft attached to the spark plug, scared me, so threw it back in, and only got to change 2 of the 6. Not sure why the top broke off, but I think I'll leave it for my next upcoming service. I don't want something to happen.