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Discussion Starter · #1 ·
I just tried to change spark plugs in my 2003, 4.7 Dakota. All came out just fine except for No.2. It loosened about 1/4 turn and then froze up. I can work it back and forth for the 1/4 turn and have soaked it with penetrating oil, but no good. It just hits a wall when trying to turn. I guess the threads are galled in the aluminum head. All was done with a cold engine. Any help if I try it hot? Anybody have thoughts?
Thanks
 
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