You bet it's a dictatorship, if that's what you want to call it . - If you contadict someone and your incorrect, what do you expect ? Joy ?

Well, don't let the door hit yuh in the a$$ - You don't warm the engine - If you try to remove while the engines warm you increase your chances of thread damage . That's just common sense and it's even in the manual which info comes from engineers. I don't know more than the Ford Engineers in this field and don't pretend to. I have read from Ford Engineers/Techs that carbon buildup in plug threads will damage a warm head with ONLY 4 threads upon removal when the head is not fully contracted- YOU are confusing the two valve with the 3 valve TSB. That's a fact and not an opinion. In order to benefit from these forums, you can never be affraid to learn something from what goes on out in the field.

Yes anti - seize is common practice , but it's been tested on two valves with 4 thread heads to have adverse effects in the past when minor damage has occurred. Minor damage cannot be prevented in some cases. Specially in cases where the plugs have been left in the motor beyond yield life. Seen it myself. This forum is to help people, not go against. Once info is posted, it's a good idea to make sure yours is correct before you contradict someone else's. Otherwise you may get flamed.

So long

 

Geeze, a little rough there "Fidel 'jbrew' Castro," don't ya think?

 

slc10844 and jbrew. Thank you both for your post. You both have an opinion and I thank you both for each of them. I am an engineer and I have worked for both Ford and Chevy in the pass. I am here to see what everyone has experience in the field. I welcome both sides. It's up to me to choose which is the best for me. I have run aluminum heads on races cars long before they showed up on production cars and trucks. I have changed the plugs on those heads while cold and hot. I'm on a contract job in California and I don't have all my tools with me. From the advise you have both given me, I have decided it's best for me to wait till I'm back at my shop in Alabama.

Thank you both again for your advice.

 

Was I ? Well, your prolly right - my bad :o

 

It's has nothing to do with the heads being aluminum . It's that they only have four threads in the pockets. That in-tern leaves a large portion of the plug exposed in the cylinders which over time can build up a significant amount of carbon deposits. If removed while the heads are warm and still somewhat expanded, it's very easy to damage the thread chamber. Whether it be cross threading or just increasing the thread cut.

It's hard to get away from doing a little harm to the threads over time. Anti seize does not last on the ends exposed in the cylinders where you want it to. However, if the least amount of damage is done to the thread chamber, Anti seize can and has helped with the loosening up the spark plugs.

It's the opposite in the three valves lol - but that's another story.

 

jbrew. Thanks again for the expanded information. Four threads doesn't give you much to work with. I'm sure I'm going to wait till I'm back at my shop to do the change. Have a great weekend trucking.

 

No Problem - Have a good one yourself. I'm trying to get the dang Power Washer to fire up. First time the Honda won't start I bet a damn bug used the carb jet holes for a sh^ter over the winter

Oh well -Latuh

 

Use Motorcraft or Denso Iridium plugs in the motor. Just be damn careful and take your time. It really isn't *that* hard to do. Figure 3 hours total.

 

I have used ngk plugs in my 99 expo 5.4 with good success. But I'm doing the new 01 5.4 150 today and I bought some motorcraft platinum plugs. I also have some ngk tr55ix iridium plugs available.What is the best plug of these do you guys think??

1.Motorcraft platinum
2.ngk platinum
3.ngk tr55ix iridium

ps. Just taking out the missfiring lame champions I put in 3k ago!

 

I like the Motorcraft "Fine wire" plugs myself. Denso's are nice as well. NGK's will work fine. Those are the only three brands I would trust.