Sparkplugs
Senior Member
Joined: Jul 2006
Posts: 168
Likes: 0
From: Woodstock, GA
Originally Posted by Toby2240
I don't mean to sound like an jerk, but if you use the search function and do a little bit of reading you should be able to find your answer. I know I'm a junior member too, but I know some of the guys on here that have been around for awhile get tired of people asking the same questions.
Senior Member
Joined: Sep 2013
Posts: 108
Likes: 0
A word about getting plugs from a dealer is that they can make a mistake too because Ford has superseded some plug numbers.
If they don't look close, you could get the wrong ones.
Some heads have more threads than others.
If you get a plug that has less threads than what's in the heads, damage results to the heads.
This bears some extra thought because it's what the plug hole configutation is.
Either limited threads and there is a counter bore to allow for the unthreaded portion of the plug, or full thread, as referenced to the taper seat seal.
These are half and full threaded plugs that otherwise are the same in function.
Best to look at what you have first or take one with you to compare.
An example is for an 02 4.6L f150, OEM was AGSF32PM. The new designation is AWSF32PM. The difference is the AWSF has full threads all the way to the taper seat area.
That means my heads can take either one but some heads cannot.
Same would apply to after market plugs.
If they don't look close, you could get the wrong ones.
Some heads have more threads than others.
If you get a plug that has less threads than what's in the heads, damage results to the heads.
This bears some extra thought because it's what the plug hole configutation is.
Either limited threads and there is a counter bore to allow for the unthreaded portion of the plug, or full thread, as referenced to the taper seat seal.
These are half and full threaded plugs that otherwise are the same in function.
Best to look at what you have first or take one with you to compare.
An example is for an 02 4.6L f150, OEM was AGSF32PM. The new designation is AWSF32PM. The difference is the AWSF has full threads all the way to the taper seat area.
That means my heads can take either one but some heads cannot.
Same would apply to after market plugs.