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I tried to pull one spark plug on my 1999 explorer 4.0 sohc it has 95,000 miles just taking a look but the are extremely tight.Is their any way to get them loose???
PB blaster works well. The plugs tend to corrode into the head because the heads are alluminum. Be sure to take an air compressor and blow the crap away from the plugs before taking them out. That way you don't get stuff in the cylinder head.