My neighbor has an older Maxima with a V-6 that has a plug that neither he nor the dealer can seem to get out. He is afraid that anything drastic will mean removing the head and a big bill to go along with it.
Has anybody ever had this problem and what did you do about it? The car is starting to run rough and he wants to change that plug to see if that is the issue.
Any thoughts, including any boards that might provide assistance, would be greatly appreciated.