What spark plugs for 07 gt?
10-18-2014, 06:35 PM
#1
4th Gear Member
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Location: Henry County, Georgia
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What spark plugs for 07 gt?
What do you guys recommend for a lightly modded N/A 2007 GT?
American Muscle doesn't have many options so I figured Id see whats popular out there. Should I just go with the motor craft ones again?
Im coming up on 100k and Im about to order new plugs, fuel filter, tranny fluid, diff fluid and whatever else I can think of replacing.
American Muscle doesn't have many options so I figured Id see whats popular out there. Should I just go with the motor craft ones again?
Im coming up on 100k and Im about to order new plugs, fuel filter, tranny fluid, diff fluid and whatever else I can think of replacing.
10-18-2014, 09:36 PM
#2
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If your '07 has the old design 2 piece plugs, I would recommend the one piece Champion plugs. Hopefully you will get the old ones out without any drama.
Are you doing this job yourself? Are they the original plugs? If they are the old design, and they are the original, better read up on the procedure and you might even buy the Lisle removal tool, "just in case". If they are the newer design, just throw a new set of Motorcrafts in and forget it.
Are you doing this job yourself? Are they the original plugs? If they are the old design, and they are the original, better read up on the procedure and you might even buy the Lisle removal tool, "just in case". If they are the newer design, just throw a new set of Motorcrafts in and forget it.
10-18-2014, 09:48 PM
#3
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Don't take this as definitive, since I'm not completely sure.
I think '07 was the year when Ford changed the plug type part way through the production run. If you have brown colored COPs, then you have the earlier plug; if you have black colored COPs, then you have the later plug.
The earlier plug was the notorious two-piece design, which sometimes tends to break when you remove them. That is PZT1F. You could call your dealer's parts department, give them the VIN, and see which plug you should be using. If it is the two-piece, get the compatible Champion, which is a one-piece design.
If you have the later plug, you should be okay with the Motorcraft, which is a one-piece design.
If your car is equipped with the two-piece plug, do NOT replace it with the Motorcraft one-piece plug.
Edit: I started writing this before Goldenpony posted, but his post made it before mine.
I think '07 was the year when Ford changed the plug type part way through the production run. If you have brown colored COPs, then you have the earlier plug; if you have black colored COPs, then you have the later plug.
The earlier plug was the notorious two-piece design, which sometimes tends to break when you remove them. That is PZT1F. You could call your dealer's parts department, give them the VIN, and see which plug you should be using. If it is the two-piece, get the compatible Champion, which is a one-piece design.
If you have the later plug, you should be okay with the Motorcraft, which is a one-piece design.
If your car is equipped with the two-piece plug, do NOT replace it with the Motorcraft one-piece plug.
Edit: I started writing this before Goldenpony posted, but his post made it before mine.
Last edited by Art161; 10-18-2014 at 09:56 PM. Reason: Explanation
10-19-2014, 09:25 PM
#5
2nd Gear Member
Join Date: Apr 2014
Location: AR
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If you have an 07 then your COPs are black and you have two piece plugs. The switch over talked about above occurred in 08.
For one piece plugs go with champs or brisk. I also heard MSD has a one piece plug now. I used brisk in my supercharged f150 and was happy, but I think they are mostly for FI applications.
If the OEMs got you 100k then a second set will likely get you the same. Likely it would be the last set you put in really so take that into account. Not sure you'll get 100k out of those other one piece options.
If you are doing it yourself with 100k on them buy the broken plug tool and follow the TSB. If you don't end up needing the tool return it. If you did use it then resale it or keep for the tool collection.
For one piece plugs go with champs or brisk. I also heard MSD has a one piece plug now. I used brisk in my supercharged f150 and was happy, but I think they are mostly for FI applications.
If the OEMs got you 100k then a second set will likely get you the same. Likely it would be the last set you put in really so take that into account. Not sure you'll get 100k out of those other one piece options.
If you are doing it yourself with 100k on them buy the broken plug tool and follow the TSB. If you don't end up needing the tool return it. If you did use it then resale it or keep for the tool collection.
Last edited by BlindGUYnAR; 10-20-2014 at 06:09 PM.
10-20-2014, 02:11 PM
#6
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Join Date: Feb 2005
Location: AZ
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Ford changed the heads for the Mustang for the '08 model forward (Build dates start around Oct-Nov 2007).
I have an '08 with a build date the first wk of Oct 2007 and I still got the two piece design.
I've used the Champion 1-pc (PN 7989) since around 10K miles and I now have 65K on them. Zero problems and I've randomly checked them since I first installed them.
I think Autolite also makes some but only a heat range colder for FI or Nitrous setups...
Oh, and if you waited the recommended 100k...good luck. There is a TSB for spark plug removal on the 4.6L Mustang. Find it, use it. Even then you may still break a plug or two. Look for the Lisle spark plug tool or see if your local Autozone has one to borrow BEFORE you get started.
If you think you want to take it to the dealer, don't waste your time. They do not cover broken plugs, even if they break them. I don't think any shop will. You will be stuck with their labor chargers for removing the broken plugs in addition to the labor for replacing them with new ones.
I have an '08 with a build date the first wk of Oct 2007 and I still got the two piece design.
I've used the Champion 1-pc (PN 7989) since around 10K miles and I now have 65K on them. Zero problems and I've randomly checked them since I first installed them.
I think Autolite also makes some but only a heat range colder for FI or Nitrous setups...
Oh, and if you waited the recommended 100k...good luck. There is a TSB for spark plug removal on the 4.6L Mustang. Find it, use it. Even then you may still break a plug or two. Look for the Lisle spark plug tool or see if your local Autozone has one to borrow BEFORE you get started.
If you think you want to take it to the dealer, don't waste your time. They do not cover broken plugs, even if they break them. I don't think any shop will. You will be stuck with their labor chargers for removing the broken plugs in addition to the labor for replacing them with new ones.
10-20-2014, 11:02 PM
#7
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Thanks guys.
Im fully aware of the potential headache Ive got ahead of me and have been dreading it for many, many miles.
Sounds like the one piece, Champion plugs are probably the way to go?
Im fully aware of the potential headache Ive got ahead of me and have been dreading it for many, many miles.
Sounds like the one piece, Champion plugs are probably the way to go?
10-21-2014, 02:22 AM
#8
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Join Date: Oct 2004
Location: Arizona
Posts: 887
Are your coil packs brown or black? Black means 2 piece. Google and YouTube advice on getting these out. If you break them your rushing it plain and simple. Wait till you have a day off and crack them a quarter turn then soak them overnight in solvent (carb cleaner or something) the next morning come back and take your time forward and back forward and back (they will scream and squeak the whole time) I took 5-6 min on each one! Just be patient. Anyone who has broken them is just rushing it. Go on YouTube and check out the specific procedure, there are many many vids on it. When you replace them I would go with the oem motocraft one piece design.
10-21-2014, 01:25 PM
#9
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
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Drew, it's an 07. Coil color is irrelevant because they will be two piece plugs (black). Even early 08's like mine still had the 2-piece.
http://www.ngksparkplugs.com/pdf/TB2....4Land4.6L.pdf
http://www.ngksparkplugs.com/pdf/TB2....4Land4.6L.pdf
Last edited by Derf00; 10-21-2014 at 01:27 PM.
10-21-2014, 02:01 PM
#10
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Join Date: Apr 2014
Location: AR
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Drew I was under the impression FORD didn't offer an oem one piece plug for the 05-early 08 head design. I'm only aware of aftermarket one piece designs.
The new one piece plug I'm aware of from FORD is for the new heads and has a 12mm thread and the older two piece plugs have a 16mm thread so they wouldn't fit.
If FORD does make a one piece plug for the old head design can you provide a part number?
I'm about to buy a set as my early 08 (build Oct 07 + black boots) has 42k on it and I'm going to go ahead and get them out of there.