Don't suppose you have a picture of the two different boots?

 

Good grief! They are the same, one is black, the other brown. Kind of like different colors of shoes. You know which one you have on when you look at them.

 

Can that new plug be used in our older 5.4's, or was there a new head design in 08?

 

No, completely new head design.

 

Just the way the spark plug holes are machined to accept the traditional spark plug design.....all the other components remain the same....

No more heat shield pocket...threads all the way...

 

Brown boot....

 

Right, but the new plug design will not thread into the old head design. As far as I know, if you had to replace heads, you could use the new head on a 2004-2007 engine.

 

Correct....
The new plug also sits deeper in the plug hole and requires a different smaller size socket....

 

Thanks 88racing...THAT was helpful.

 

He's quite the "brown" noser!

 

 

LOL....btw, does Motorcraft make a solid plug like the Champion?

 

Nope...their cure is nickel anti sieze on the shank...not to bad of a way to keep carbon building up on the heat shield....if you have the lisle tool keep it for just in case...

IMO....use Motorcraft plugs....a lot better results...less headaches...

 

That was very helpful though, I was always curious myself... thanks for that 88

 

88,

What is the recommended Motorcraft plug? SP507,sp515? Is that SP462 plug in your picture above used in the 5.4? It looks like the basket hoop is longer and less of the electrode shield is actually in the combustion chamber.

Bubba