That No. 1 rusty plug….I have had rusty plugs like most but have never seen one that bad. What surprises me is the rust all along the threads as well! Makes me wonder if it was ever screwed down properly in the first place?
I agree, it certainly doesn't look as though it was installed properly. I've put in a set of new NGK plugs now.
Roadster 3.7 Plus 4 110 Anniversary Plus 4 Fiat TC
