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i was just coming to ask about a bosch plug.
i went to advance auto for plugs asking for W9DC the person said bosch replaced them with WR8DP. they are different they have the ceramic cone all the way up the center electrode. the electrode is very small in diameter.
now after reading the above i'm guessing this is a thin wire plug. are these ok to use in the 4.2 420sel???
if they are ok what would the proper gap be. it actually looks like it is already set because if you would try to open up the gap the point arm will be pulled away from the center cone.
help should i use these or should i go back and try for a different type?
1972 350sl Red/Blk 117k
1988 420sel charcoal/Blk 140k
1987 420sel gold/tan 128k
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