69 gas tank filler neck and refueling problems - Team Camaro Tech
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post #1 of 12 (permalink) Old Sep 14th, 13, 01:04 PM Thread Starter
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69 gas tank filler neck and refueling problems

I've searched the forums and this seems to be a common issue, but haven't found a good fix.

I believe the filler neck on my 69 is to high. It is a new OER tank, and I wonder if anyone has dimensions or photos of their installation. It is very difficult to get the nozzle into the filler neck. I have to hold it in place because no matter what angle I try the nozzle tube only goes into the filler neck 2 or 3 inches.

The other issue I am having is actually getting fuel to dispense. I visited a Sunoco station, (tank near empty) and even after trying 2 different pumps could not get any fuel to pump.
The nozzle clicked off immediately even if I tried to fill slowly.

I've seen some posts suggest that different gas stations use different nozzles, and I guess I can drive around to see if one brand works better than others, but this doesn't seem to be a very good approach.

I hope I'm not re-hashing an old issue, but does anyone have a suggestion.
I hope I don't have to resort to filling the tank via a rubber hose, funnel and gas cans.

Ken
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post #2 of 12 (permalink) Old Sep 14th, 13, 01:28 PM
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Re: 69 gas tank filler neck and refueling problems

1) I heard of folks bending the filler neck down(lower) by inserting something made out of hard wood (baseball bat?).

2) With some of the after market tanks, such as mine, the filler tube extends too far into the tank and the new style pumps will not fill to more than 1/2 to 3/4 tank.
So if you're going to the gas station with 1/2 tank or more, it may not pump anything.
I have heard that PUI makes a tank that doesn't have this problem.

Good luck.

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post #3 of 12 (permalink) Old Sep 14th, 13, 02:37 PM
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Re: 69 gas tank filler neck and refueling problems

Pre unleaded fuel pump nozzles were less curved then today's environmental off gas vapor collecting ones are. There are several solutions that have been posted here that run the course of modifications to the filler neck to changing the filler neck location to inside the trunk.

I use a simple length of vinyl tubing that fits the filler neck. Stick the nozzle in and pump. Add a frat funnel to the end and it is perfect for filling with a Jerry Can. Both available under 5 bucks at any large box store. Or confiscate your teenagers frat beer funnel for free.
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post #4 of 12 (permalink) Old Sep 14th, 13, 05:04 PM
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Re: 69 gas tank filler neck and refueling problems

X2 on the nozzles being curved. Keep in mind all the new cars have a small 1" flap and diesel is wide open like these old cars.

I wanted to add that our car has the original tank I have to hold the nozzle BUT I don't have any trouble getting a full tank. Do you have trouble filling gas cans out there in OH too? There is no restriction in the filler neck, or at least I don't think there should be.

You may have to hold the fuel nozzle and aim in in the neck like you would a fuel can.

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Last edited by 69L48Z27; Sep 14th, 13 at 05:06 PM. Reason: Added comment
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post #5 of 12 (permalink) Old Sep 14th, 13, 06:20 PM
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Re: 69 gas tank filler neck and refueling problems

Drop the tank and add the 1/2" hard rubber isolators between the top pf the tak and the truck pan.

Makes a world of difference to drop the filler neck 1/2"

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post #6 of 12 (permalink) Old Sep 15th, 13, 04:47 AM Thread Starter
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Re: 69 gas tank filler neck and refueling problems

Thanks all, I appreciate your suggestions. I'll probably add the spacers under the tank.
I'm just not crazy about carrying around a funnel and tube, although that might be an option I try short term.

I was able to get the nozzle in the filler tube but could not pump any gas at all, the nozzle immediately clicked off. Even holding the nozzle so it was only in the filler neck by an inch or so resulted in the same thing. Maybe there is something about the nozzles used at my local Sunoco station.
Just completed getting the car back together after sitting in my garage since 1970 and I didn't expect a problem like this.
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post #7 of 12 (permalink) Old Sep 15th, 13, 09:02 AM
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Re: 69 gas tank filler neck and refueling problems

LOL I only use the funnel at home with Jerry-Cans The tube rides in the trunk no problems. I think it is 18 inches long but all you need is enough to fit tight in the neck and long enough to insert the nozzle. If you are buying it you can cut any length you want. Mine was recycled from a frat house raid.


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post #8 of 12 (permalink) Old Sep 15th, 13, 09:28 AM
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Re: 69 gas tank filler neck and refueling problems

Well for anyone buying a tank in the FUTURE (I know, doesn't help the op) you can avoid this by buying a Spectra brand tank. I have seen several posts about other aftermarket tanks for 69's that have the neck extending down into the tank, making it virtually impossible to fill at the pump. Upon receiving my Spectra tank, I compared it side by side to my original. Could not find any difference EXCEPT for the date code, which isn't visible once installed. I still hold the nozzle it when filling. It does stay by itself, but it is precarious enough, I hold it just to be sure.

The only way to fix the neck issue on an existing tank would be to pull it, have the neck removed, cut down, and reinstalled. Would probably exceed the cost of buying a new tank, which is $95.79 at Rock Auto.

Some folks still don't realize that OER (or "officially licensed GM reproduction part") absolutely does not mean it is a MATCH to the original equipment part, nor does it guarantee any level of quality control. It only means they cut a deal with GM to call it OER or "officially licensed".

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post #9 of 12 (permalink) Old Sep 15th, 13, 09:40 AM
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Re: 69 gas tank filler neck and refueling problems

I just installed a OER Stainless tank and it is an exact copy of my original 69 GM steel tank inside and out. Don't know about the OER Steel tanks but expect the same process is used for both Steel and Stainless tanks from them.

I think the tanks with the deeper neck issue are made in Canada and sold under a few names.


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post #10 of 12 (permalink) Old Sep 15th, 13, 03:45 PM
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Re: 69 gas tank filler neck and refueling problems

Quote:
Originally Posted by bilodeaulynn View Post
Well for anyone buying a tank in the FUTURE (I know, doesn't help the op) you can avoid this by buying a Spectra brand tank...
Good to know, as I'll be buying a new tank.

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post #11 of 12 (permalink) Old Sep 17th, 13, 03:54 PM Thread Starter
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Re: 69 gas tank filler neck and refueling problems

I appreciate all of the suggestions.

So today I bought a 5 Gal gas can, funnel, and several different sizes of tubing.

I was expecting problems at the pump, but I went to a Circle K (Marathon Gas)
and while a tight fit, the nozzle did go into the filler tube and pumped fuel.

I filled the tank very slowly and it "clicked" off at just over 10 gal.
I then very slowly tried to put more fuel in and at 12 gal, fuel over filled and spilled out of the tank.

Good thing my local station had paper towels to clean up the mess.

So now I'm wondering if my filling problem is related to the location and nozzle used by the gas station.

I'm also questioning the accuracy of my gas gauge. Did the spill result because I already had 4-5 gal in the tank (gas gauge showed empty)

After filling, my gas gauge shows about 1/4 inch past the full mark.

Maybe this is normal, FYI, new Gas Tank, new Tank Sensor.

I'm going to try a few more stations

Just a suggestion, but it would be good to know what stations work by state, and what ones are known not to work.

Consider a new Forum category.

Never thought filling my tank would become a 7 day study ordeal

Ken
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post #12 of 12 (permalink) Old Sep 17th, 13, 06:51 PM
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Re: 69 gas tank filler neck and refueling problems

Ken,
Glad you found a solution that works for you. Sorry I should have posted the diameter of my frat funnel hose. It is 1 and 1/4 and the interior is one inch. It fits snug in the filler neck. The hose is the kind of clear vinyl that has mesh embedded. The length is 26 inches long which is long enough to insert and not loose, and when the funnel is connected, long enough to hold the funnel up to get a good level sink base to pour into.

The bad tanks from the North have the neck terminate deep inside the tank and I think folks have posted they are about 15 gallons max. While the OEM tank is rated at 18.5 gallons capacity.

That said the sender float arm in the empty position is hovering a few inches above the bottom of the tank, where a few gallon of fuel still live. The only way to rally know capacity of your tank is to empty the tank as far as you can with a siphon, then drop it and pour the rest out. Then reinstall and fill with three full 5 gallon Jerry-cans and one that is filled with 3.5 gallons. If you can get it all in you have a proper tank. There should be a little room at the base of the filler neck for expansion.
It is possible you have 5 gallons left when your gauge says empty. I think I have high four when the needle points to empty and I bone the tank empty and stall with about two gallons left in the tank but the fuel level is below the pickup or I parked at the wrong angle for the pick up to reach the puddle left.

If you have 69 dash right hand pod mounted fuel gauge you can reposition the needle to reset the milestones of full and empty. Console and center dash units you have to change the resistor values to correct the gauge, but in theory you had over filled your tank, fuel level should be an inch or so below the base of the filler neck to be Full.


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