[drcoffee]

I don't believe in "torqueing" spark plugs ever! I palm the wratchet and squeeze them in place on aluminum heads. Usually its about 6-8#s. You just need to seat the plug and crush the gasket, nothing more.

As for your situation I had purchased a 1996 Explorer a few years back with 60,000 miles on the clock. It was obvious the plugs were original so I made the change. The #2 plug would not come out for 3 days. I just sprayed it with liquid wrench 5 times a day and rapped it with very short bursts from the electric impact wrench. If I had to say how long a burst is, I'd say it is equal to 3 impacts and then off, repeat 5 times. Any more than that and you may shear off the plug. The impact wrench helps the liquid wrench penetrate. And once it does the plug usually comes out. But it took 3 days before the plug came out of the iron head truck of mine. Just have patience and take your time.