[Laneco]

Ford will generally want to pull the heads on the 5.4 to do even one plug per bank, so it's a virtual guarantee that they will take them both off for this job, even before we get to the fact that bits are in the cylinder... Some dealerships even want to sell you a new head(s).Definitely do the thread repair on EVERY one of them, even if the stub of the spark plug comes out good. At this point - do them all, make them all the same.

We have a buddy here in town who will do these with the head on (though probably not for 8 of 8 broken). He does them FOR the Ford dealership. They just send the vehicle over to him. Definitely a trick to it.

Also when removing plugs on these, his advice is roughly as follows..."Get the motor hotter than a drunk prom date, squirt around the plugs with your favorite break-free product. Let it sit over night and remove them when they're ice cold."

Obviously a bit late for that advice now.

angela