Engine build date 1-23-03 updated heads (sp blowout)?

[dave91gt]

Getting ready to do a plug change at 110,000 miles. Just wanted to know if anyone knows if I am OK as far as thread count goes for the plugs.

[Antelope V-10]

I cant give you a definite answer, but my 11-15-02 build date had 4 threads. Let us know what you find and we will be able to get a better cut off date for more threads.

[dave91gt]

Will do. I keep putting off the plug change until I figure out my driveline vibration. I have already sunk some$$ into fixing it, but haven't found the problem yet. If I can't figure it out, I do not see myself keeping it as it drives me absolutely crazy to have driveline vibes with nothing more than F350 blocks. Heck, it had vibes stock. I am getting ready to replace the transfer case. If that takes care of the vibes, my next job will be the plugs. Funny, I would rather change a transfer case than do plugs on a modular.

[Antelope V-10]

I have never looked under an excursion but does it have a 2 piece drive shaft with a carrier bearing? I had to shim mine down stock to get rid of a vibration then even more down when I put the 350 blocks in.

[Krewat]

here:

December 1996 - 4.6L 4V alignment feature added
February 1997 - 4.6L 2V head alignment feature added
September 2000 - WEP (Windsor Engine Plant) 2V head alignment feature modified (4.6/5.4/6.8)
November 2002 - WEP introduced long thread heads on 2V (all)
May 2003 - REP (Romeo Engine Plant) introduced long-thread heads on 4V 4.6 and 5.4
November 2003 - REP introduced long-thread heads on 2V and modified alignment feature

In 1999, and 2001, an interim fix was done for a cross-threading issue.
Original process:

Step 1 - Zero torque spark plug (air tool)
Step 2 - Torque to 16-20Nm final torque (DC Run down), monitor at 6-12Nm, and final torque must be reached within 0-360 degrees.

New process (addressed the possibility of applying installation torque for more than 25 degrees of rotation)
Step 1 - Zero torque spark plug (air tool)
Step 2 - Torque to 16-20Nm final torque (DC Run down) start monitor at 6-12Nm, and final torque must be reached within 3-25 degrees.

Another action to address cross-threading was the addition of an alignment feature to lead the plug into the hole.

[dave91gt]

That my friend is perfect.

[dave91gt]

My drivers side valve cover says Ford Windsor so with my build date, I should be good.

[Krewat]

All V10's are produced in the Windsor plant

I think, but not sure, that all 5.4's are also produced there, with the exception being the 4-valve 5.4's that are produced at the Romeo plant.