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Old 08-14-2008, 10:24 AM   #1
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Lightbulb Fuel tank filler neck grommet replacement tech w/ step by step pics

As many may know (and many may not), the fuel tank filler neck grommet located at the passenger side of the Mustang fuel tank is KNOWN for rotting out on the 94/95's. I have read and searched many threads on here, as I too do have to order the necessary grommet and replace the original on my Cobra. In searching many threads on this site and reading many replies - many have said that the gas tank has to be dropped in order to replace this grommet.

After googling some more, I came across an excellent tech thread from another Mustang Forum that shows how to replace this grommet WITHOUT having to drop the entire gas tank! This tech thread is excellent and has clear step by step pictures depicting the entire process needed for this procedure, making the entire R&R process much easier than having to drop a fuel tank!

Courtesy and credit goes out to Stangnet Member "davis3", who posted the original tech on Stangnet back in 2006:

REPLACEMENT TECH: http://forums.stangnet.com/748604-ho...sket-pics.html


The grommet that needs to be replaced:



The above mentioned grommet is the same from 79-97, the 98's used a different grommet. This grommet can purchased from 50resto.com or Mustang Unlimited.com.

50resto 79-97 grommet:
http://www.latemodelrestoration.com/...tank&b=&page=2

Mustangs Unlimited 79-97 grommet:
http://www.mustangsunlimited.com/ite...sp?T1=F4141+01




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Old 08-14-2008, 10:34 AM   #2
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good link. i am pulling tank soon, might as well do this.
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Old 08-14-2008, 10:50 AM   #3
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I found out the hard way and dumped 3 gallons of gas all over my foot at the pump.
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Old 08-14-2008, 02:53 PM   #4
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I might have to try this next time.......i've replaced two of these on my 95 Cobra and one on my 95 v6. I'm just waiting to have to replace it on my 96 Mystic.
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Old 08-14-2008, 04:43 PM   #5
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I tried for a long time to get my filler neck out of my tank when I was taking my 95 apart. Seems like there is a lot of opportunity to potentially damage the new filler neck grommet with the tank left in place. Hopefully, I won't have to do this again for another 10 years anyway.
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Old 08-15-2008, 08:30 AM   #6
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These grommets only tend to last about 50,000 miles.
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Old 08-15-2008, 08:59 AM   #7
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Ford stealerships also have them for around $22. That was about what I paid a few years ago when mine went out. They parts guy said they used to be $3, then they changed the material so it wouldnt rot out like the originals, so now they are $22.

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Old 08-15-2008, 09:17 AM   #8
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Good info.
Any time the tank is removed, that grommet should be replaced, imo
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Old 08-15-2008, 10:04 AM   #9
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Quote:
Originally Posted by RED95GTCOUPE View Post
Ford stealerships also have them for around $22. That was about what I paid a few years ago when mine went out. They parts guy said they used to be $3, then they changed the material so it wouldnt rot out like the originals, so now they are $22.

Brian
You're exactly right. About 6 yrs ago I had to replace one in my previous 95 Gt and that's all I paid...3 bucks. 2 yrs ago(roughly 21k miles) I replaced the grommet in my current GT and it was $22. Last weekend I put a 255lph pump in my tank and the grommet still looks new. When I did put it in there I didn't have to drop the tank although it might have been a little easier if I had. There was a good 12 gallons in there at the time and I didn't want to be wearing it.
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Old 11-01-2011, 10:29 AM   #10
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Thanks for the step by step instructions. I'm about to do the same to my car. I've owned my 94 GT since 97 and I'm the second owner.
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Old 11-01-2011, 10:42 AM   #11
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Gaaahhhh!
I tried for half an hour to wiggle the neck out of the tank and it wouldn't come. Must be something unique to my car, good for you guys who can do it.

One added tip: Be extremely careful when pulling the old grommet out of the tank since it could rip in half and the inside part of it could fall into the tank.
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Old 11-01-2011, 11:03 AM   #12
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I just called the steelership and they want $28 plus tax for it!! For a little rubber donut. Ripoff artists...


P63, yeah I will watch out for that, thanks for the heads up. I'll report back after get it installed.. With time my constraints, it could be a few days or weeks until I get around to doing it.

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Old 11-01-2011, 04:00 PM   #13
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Wow,I wrote that in 06?
Seems like just yesterday.

I've updated that guide,as some have not been able to maneuver the filer neck out.
If its difficult to remove, place your Jack under the tank and loosen the tank straps.
Lower just enough to remove the filler neck.
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Old 11-03-2011, 02:23 PM   #14
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One thing that I find interesting:

Petroleum products eat rubber products. (Evap hoses? PVC hoses? All get destroyed over time.) Yet, I notice that companies and members on the various forums say to put a little oil on the grommet for ease of installation? And on a parts web site, they show a guy spraying WD40 on the filler neck and grommet?

I know that it would be partly submerged in gas at times, but on the outside of the grommet, where it would otherwise remain dry, that applied oil or WD40 still cant be good for it. Not to mention that gasoline eventually evaporates while oil and WD40 do not.

When I did mine, I just wiped everything clean and installed it. No issues.
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Last edited by kbernal1016; 11-03-2011 at 02:36 PM.
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Old 11-10-2011, 11:59 AM   #15
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I didn't see the recommendation to lube the grommet. I just installed it... no problems either.
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Old 06-14-2012, 06:05 PM   #16
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Thumbs up Thanks for the Writeup!

I'll be doing this in a couple weeks on my 98 Cobra. It has just over 80,000 miles on the original gas tank grommet.

I wonder why the 98's have a unique part number for the grommet?
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