2007 Ford F-150. 5.4L, 2wd, 143k miles. Only ran hot once in it's life, about 4 years ago when I had a cracked radiator. Took it in yesterday to have the #2 plug and ignition coil changed because it was reporting a misfire. Plug and coil is changed, still misfiring. They check again and feel like it's a leaking head gasket. You can put a finger in the plug socket and it comes out wet. Instead of patiently waiting on a call from the shop with a quote, I impatiently ask the internet's small corner of utmost intelligence and expertise, TBOT. If it is indeed the head gasket, what am I looking at? I've seen comments of various F-150 message boards ranging from $1200 to $3500. What say you, Off Topic?