I think its time to pull the head and either have a machine shop fix it or just replace it they are faily inexpensive, oversize plug wont work and if it did it would be unsafe, if you fix it right it wont give you any more problems, also try anti seize on the plug threads of the plug when replacing them next time it will let the plugs come out easier
thansk
jim
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Sunday, February 18th, 2007 AT 9:28 PM