Quote:
Originally Posted by crysalis_01
Yeah, the 2v's had 4 plug engagement threads, so plugs would shoot out of the heads from time to time. Had to helicoil a head for my brother's 99GT.
This covers the 3v's craptastic 2-piece plugs that were over torqued into the heads from the factory. They had a tendency to snap in half upon removal. Happened so often Ford had a tool specifically designed to remove the broken plug halfs from the head.
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They weren't over torqued, carbon deposits would get on the long tip of the plug and cause it to stick in the head. Fords tool was a joke and half the time it didn't work. Lisle makes a tool that works but it breaks the porcelain off into the cylinder.
The trick to getting the plugs out is to get the engine hot and use a 3/8 impact gun and they'll come right out. De carbonizing the engine with a can of sea foam also helps.