Drill a hole into Fuel Filler Neck?

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mario03srt

mario03srt

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All,

Does it sound safe to drill a 3/8th or so hole into my fuel filler neck inside the trunk to place a vent tube? This is with it still connected to the tank. It's safer I'm sure to pull it but I'm looking for some experience here.

Thanks,
Marion
 
One spark from the drill bit and you might have a problem!! Even if you could safely get a hole in there you'd still need to solder or weld the vent tube to the fuel filler neck....high heat and gas fumes are not compatible>
Maybe someone else has a better idea.
Treblig
 
Take the screws out of the filler neck on the quarter panel, and wiggle it out of the gasket. Don't try and drill it still attached to the car....
 
IF you decide to go against the previous wisdom presented, please do make a video of the process with you drinking a beer, and start with the line "Hey guys, Mario here, watch this" so that we all may learn how well it works.......Or not.
Thank you


EDIT; For maximum entertainment value and guaranteed internet longevity, perform the procedure using a plasma cutter/torch.


Disclaimer: FABO nor its members endorse this post. FABO, its members, nor poster shall be held accountable for complications arising from performing said actions.
 
Last edited:
RogerRamRod said:
IF you decide to go against the previous wisdom presented, please do make a video of the process with you drinking a beer, and start with the line "Hey guys, Mario here, watch this" so that we all may learn how well it works.......Or not.
Thank you
Click to expand...
That's pretty GOOD!!:rofl:

I also forgot to mention that the metal shavings will also end up in your tank!! Too many negatives and no positives!

treblig
 
yea - even IF you get away with drilling the hole and IF you find some way of installing a vent tube without soldering or welding - I'm thinking that shrapnel that finds it's way down the tube and into the tank isn't going to work out well for you in the long run..
 
In the immortal words of Lyle Alzado

don't do it@!@
 
One hot piece of metal shavings from the drill bit when it finally goes through the pipe could fall into the tank. If that happens you will vent the gas tank along with yourself and the immediate area around where your doing the drilling. Um.....like was already said, DON'T DO IT!
 
Why do you need a vent in the filler neck?
What year/model of car?
Are you running a stock tank?
 
Its super easy to remove the filler neck, why temp fate? The only way I would do it hot is if I had a nitrogen purge on it. Even then you will end up with metal shavings in the tank.
 
all this explosion talk reminds me of the jackass several years ago at a paint shop in Springfield Mass who used a lighter to check to see how full the barrel of paint thinner (or prep-sol) was... --- yea.
 
Even "when" people use a torch to cut the top off a barrel that has contained flammable liquid, they should fill the tank with water to purge fumes.
As you can tell, what you are suggesting is a very bad idea.
 
ScampMike said:
all this explosion talk reminds me of the jackass several years ago at a paint shop in Springfield Mass who used a lighter to check to see how full the barrel of paint thinner (or prep-sol) was... --- yea.
Click to expand...
Reminds me of the guy locally several years ago who got the bright idea to try to turn a used propane tank into a BBQ grille.... without first checking to make sure it had been fully emptied..... they never did find all of him
 
Yes, make sure the tank is almost empty so there is lots of vapour in the tank. Also considering smoking a cigarette while drilling the hole.

This thread is a joke, right?
 
No need for me to comment, all you guys already got this!!

...............And then...........there's the vacuum cleaner method...........
 
kiss said:
Why do you need a vent in the filler neck?
What year/model of car?
Are you running a stock tank?
Click to expand...

I'm also curious if your car originally had some kind of venting. I'm only familiar with my 1967 Barracuda with the vent attached to filler tube and then vented below the trunk. It sounds like you want to do something like that.

My filler tube looked good from the trunk, but when I pulled it, it was badly rusted where the tube was submerged in the tank, and I just replaced it. Cost was about $70 from 521 Restorations. Consider you how much your time is worth. BTW, the new tubes are temporarily not available from 521.
 
All,

The car is a 73 Dart, that has a charcoal canister and a vent tube that runs to the tank. The canister has been removed. I want to use the 1/4 vent line for my FiTech Fuel Command Center as it requires a vent. The FCC "vent" actually may have some small fuel content in it. I am looking into running the 1/4" line into the filler neck or just get a new fuel sending unit that has a vent built in. So I'm trying to get a feel of all that is involved before I decide the direction that I'm going. The filler neck gaskets and tank grommet look ok but could crap out though. One great thing about FABO is all of the info and work-arounds, so I ask the dumb question and accept the feedback from everyone. ;) I will most likely tear out the tank and the neck and replace with new gaskets and grommets. This way the vent line will go in lower that the fuel filler tube and perform better.

Thanks,
Marion
 
73Swinger18 said:
Drill a small hole in your cap instead.
Click to expand...

Just don't go too deep and drill into your head.... :poke:

(Since he doesn't want to remove the filler tube, I assume he will just drill the cap on his head and over shoot....) :D
 
mario03srt said:
This way the vent line will go in lower that the fuel filler tube and perform better. Thanks,
Marion
Click to expand...

Not sure what you mean, here. I would NOT put it in "lower" and don't confuse "vent" with "return." Hooking your FI tech vent fitting (or is it a return??) to the 1/4" existing line will not vent anything, and will THEN PLUG the only vent for the fuel tank

If you put a fitting (maybe two) into the fuel neck, I would put it up high, refer to how the original "up through" 69 model cars are done..........a fitting up high, and the vent bends clear up to the top of the rear fender, then back down along the back of the filler tube, down through the trunk seal gasket, and ends in the frame rail. THIS IS TO PREVENT siphoning out of a full tank

ALSO if your FItech has a return to the tank (not a vent a RETURN) you want something LARGER than 1/4"........I would use at least 5/16 and consider 3/8. The return fuel should NOT be restricted as this screws up the pressure regulation.

242yckm.jpg
 
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