Changing the plugs (5.4)
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Changing the plugs (5.4)
I have 107,000+ miles on the 2000 F150. I was thinkin' on changin' the plugs but my mechanic told me of a problem. The plugs, when in the head drop below the bottom surface of the head and collect a carbon build up which could cause problems when trying to remove the plugs like damaging the head. Thoughts?
Tuned
Joined: Oct 2003
Posts: 463
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From: COLORADO, USA
Here this will help:
How To Change Spark Plugs on 4.6 & 5.4 Liter F-150s .: Articles
I did my 2000 when it had 90K I believe. My 2001 has 115K and I am getting ready do change them soon.
How To Change Spark Plugs on 4.6 & 5.4 Liter F-150s .: Articles
I did my 2000 when it had 90K I believe. My 2001 has 115K and I am getting ready do change them soon.
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Thanks
Posting Guru
Joined: Oct 2005
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From: Louisville, Kentucky
Just be careful taking the plugs out, loosen it a bit, then turn it back in some. Repeat this process until the plug is out. That should take care of the possible problem that the mechanic mentioned.
This is a excellent thread on changing plugs. Good luck!
https://www.ford-trucks.com/forums/104027-how-to-replace-your-4-6l-and-5-4l-spark-plugs.html
This is a excellent thread on changing plugs. Good luck!
https://www.ford-trucks.com/forums/104027-how-to-replace-your-4-6l-and-5-4l-spark-plugs.html
Laughing Gas
Joined: Oct 2003
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From: DC
It sounds to me as like your mechanic is describing an issue that sometimes happens on the 2004-2007 5.4. They have a "long reach" 2 piece plug that can break off in the hole if carbon builds up. I think you're OK to cahnge yours, but I recommend you read the plug changing thread first.
Tuned
Joined: Oct 2003
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From: COLORADO, USA
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Postmaster
Joined: Nov 2006
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From: SE Wyoming
Neither have I, the problem with the 2V's is the number of threads in the heads and people not changing them enough as well as not torquing them correctly. The additional threaded plugs work with the revised heads in '03 previous years they will not make a difference one way or the other.
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Now you have me convinced I can change my plugs as well on my 2000 with 5.4. I have a quick question maybe you can answer or I'll go to the other forum but I also have a 98 expedition with 5.4 and half the engine is under the firewall. I let the dealer do it the last time its about due again. Is there any other secret other than using the right wratchets with swivel heads, different extensions, and another swivel and does the fuel rail have to come off of that one? Thanks.
Junior User
Joined: Jun 2009
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Thanks John, the engine is the same. However the back half of the engine on the Expedition is recessed in under the dash about like a van. I assume the ford mechanics have some special tools they use to reach back in there but maybe they just use flex wratches, etc. I check over on the exp site.
Posting Guru
Joined: Oct 2005
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From: Louisville, Kentucky
That sounds just like what I found under the hood of my truck. The rear plugs are particularly difficult to reach because the rear of the engine is back under the cowling. I had a 1978 AMC Pacer that was just like that too. Good luck!
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