The problem with these plugs is the design. The threads go past the threaded part of the head and allow combustion byproducts to build up and interfere with removal. They are also of a poor design that is prone to breakage. Best advice if you are going to try them yourself is do not force anything. If one starts to bind, turn it back in and work it back and forth a few times until it loosens up. Once you break one, you will probably be going to the dealer anyways.
Personally, I ALWAYS use a thread lubricant on spark plugs that go into an aluminum head. You have two different metals in contact with each other, and the plug is prone to binding or galling in the aluminum threads. I have on occasion seen the threads come out with the plug. Better safe than sorry.
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Today's Featured Article - Farmall 460: That's My Girl - by LeAnn R. Ralph. How many sounds can you think of that are as familiar to you as your own breathing? What about the hum of your refrigerator? Or the thump of your clothes dryer? Maybe the engine of your car? You hear those sounds every day, and you don't think much about them, do you. I can think of a few common, ordinary sounds in my daily life, too.
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