Tackled the Spark Plugs Tonight...

Well, I decided to tackle the dreaded spark plugs on my 2007 GT today. Success!

For those people that do not know, the 3 valve Mustangs, F150’s, or other vehicles have a Ford 3 valve engine in it is prone to having carbon build up on the spark plug shield that sits inside the cylinder head. If too much carbon builds up, it is possible for the two piece plug to separate when removing the plug and leave you in a sticky situation that may potentially cost you some money and a trip to a dealer.

EDIT: Hoboattacker has a good thread started about Late 07 and 08 stangs and their updated plugs!http://forums.stangnet.com/showthread.php?t=745436

Let me first say that some people shy away from doing this because there is a possible risk that there is already too much carbon on the plug and you could break the plug on a perfectly working car.

My GT has 18,365 miles on it and I only had second thoughts about doing this one time. The number one cylinder gave me a little bit of a fight coming out. I only used a 1/4” socket wrench, so I was able to limit the amount of torque I applied. I let it sit with a little bit more of the penetrating fluid and it came out without any issues.

I followed the TSB to the letter: http://www.fcsdchemicalsandlubricants.com/fad/tsb/06152.pdf

I was sure to use a lot of air from my compressor to ensure there was absolutely zero dirt in the spark plug well before I squirted it with penetrating fluid.

Below are some photos of before, during, and after I removed them and cleaned them. I did not take pictures of the application of the nickel anti-seize.


Plugs right after removal and before cleaning:


During cleaning:


After cleaning, before Nickel Anti-Seize and re-installation: