Me and my friend Bryan just changed the spark plugs in his 2004 5.4L at 119k miles. To clear things up, He does not know the history of his truck as it is a part time tow rigg and was bought from a small local used car lot at 89k miles in 2011. For the previous 6 months, he has been running 89 octane, and techron cleaner every other tank. Yesterday when he brought it over he put a full techron bottle ( 20gal treatment ) into about 5 gallons of 89 octane, and drove it over. He bought the SP515s, the 9/16th spark plug tool, and the Lisle 65600 so we were ready and tore into it while it was still hot.

After breaking each plug loose 1/8th a turn with my torque wrench at 33ft lbs, we filled the plug holes with carb cleaner each plug we broke loose. He removed the plugs with the tool and my 3/8ths socket. The second cylinder to the front of the block is the only one that squeaked on the way out, everything else was relatively quiet and ALL came out unbroken. We were excited for a no broken plug job, but then I got too curious and looked up the part number on the plugs we pulled. It was part # PZT14F. Within my research ( mostly on here ), it seems I am finding that this is the redesigned version of an SP507, or at least, better at handling 1k/2k degrees. This posting by Bluejay is what made me realize we probably did not remove original 2004 spark plugs from this truck...
https://www.f150online.com/forums/3465303-post19.html

So this plug was not even installed in the 04/08 body F-150 5.4L when the last 2008s were rolling out. So basically we replaced non original plugs. So is that the sad truth? We really didn't replace 2004 plugs did we? What was the original 2004 part #?

My truck, which is a 2007, is our next tackle, but I have a full maintenance history prior to my purchase of it in May 2011, and a spark plug job is not in there... So I am back to feeling the nervous pressure of the plug job.

 

I *THINK* the OEM plugs were PZT2F.

 

Just for what it's worth. Put it in perspective. You were well prepared for the job, and didn't need to be. Which is FAR better than being unprepared and needing to be right?

I can only hope and pray mine go that well. I am doing the Techron treatment now, have the Lisle extractor tool being shipped, and need to get the plug socket for this thing... Such fun to look forward to!

 

https://www.f150online.com/forums/20...rt-number.html

 

Found that too, pretty much sums it up.

No doubt prepared, guess the real fun will be mine in a few weeks .

I guess on a positive note, I can say the PZT14Fs will come out in one piece when removed according to TSB, and we only needed to remove the battery, the tri-connection computer harness, and the bracket to that harness, to access the plugs.

 

I'd say cause for celebration. Wish I knew what my replacement plugs are, didn't ask . . .

 

Darren, I see you mentioned a special 9/16th spark plug tool aside from the Lisle tool. What is that, is it a special plug socket for these trucks? I see several different varieties of these plug sockets, and I am curious how they differ from a standard plug socket. Any clues?

 

Its not that bad Darren, I just recently did mine about 2 months ago at 82k. I had 3 break and one of those was the passenger rear. Had the lisle tool ready and got them all out.

 

Its just an extension with a 9/16th deep well on it, it has more bite on the plug so it doesn't fall out of the average socket while coming out of the head. IT worked great. This is the exact one.