i don't know what a 1" extension is...never seen or heard of it. you need like a 3"-5" exension for a 3/8" drive socket wrench..and a 3/8" socket wrench (doh!) and a Spark Plug Socket. there are basically two main sizes of spark plug sockets...i forget the exact size but you want the smaller one.
You might need two hands to twist the wire boot loose and to pull it off the spark plug.
Start the spark plug in by hand. Put the plug in the socket (with extension) and visually line up the plug to the threads in the heads. gently screw it in STRAIGHT. when it is as tight as you can get it by hand then switch to using the socket wrench. Get it SNUG. You don't need to REEF on it super hard...just sorta tight and snug.
You might need two hands to twist the wire boot loose and to pull it off the spark plug.
Start the spark plug in by hand. Put the plug in the socket (with extension) and visually line up the plug to the threads in the heads. gently screw it in STRAIGHT. when it is as tight as you can get it by hand then switch to using the socket wrench. Get it SNUG. You don't need to REEF on it super hard...just sorta tight and snug.
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