Hey guys,
I found some fine particle inside my carburetor.
So i decided to check my gaz tank.
After removing the fuel i found some kind of "rust dust" and it seems that it comes from my fuel neck filler which is really rusty!!
I have to change my fuel neck filler, but i see VENTED and NON VENTED...
What model should i order for my challenger 73?
Extra question, i'm thinking in changing my fuel filter for a ten micron filter. Any suggestion? Can i mount it just before the fuel pump?
Thank you!
Your tank looks good. And appears you have the expansion tank! I don't think the reproduction come with that.
The "vented" vs "non vented" is the emission thing. My experience is mostly with 1970's, but I would think on a 1973 it would be an emission car, right?
One of them vents through the gas cap and a small nipple on top of the filler tube that goes to a hard (small, maybe 1/4") fuel line that runs down to the frame rail. The other vents through the tank and back up (through a long 1/4" fuel line) to the engine plus a large tube inside the trunk. Your tank looks to be a N95 emission tank because it has all the extra fuel fittings. But them someone capped them off to use it as a non emission tank.
typically only 70 was vented all years after that would be non vented
The tank is actually a 70 California or a 71 California & Federal tank... 73 should have the nipples up front above the axle.... Those four nipples that are looped to one another are supposed to go to a vapor separator.... They are how the tank is vented, originally the fill pipe would be un-vented..... However if your using that tank with the four nipples looped you need a vent somewhere & the fill pipe works well.... However the vented fill pipe is a 70 only federal only deal, you'll need the right fuel cap & the vent line kit......
Or you could add the vapor separator, hook up the four vent lines, add a vent line to the front (or not) and use the un-vented fill pipe...
Either way you need a way for air to get into the tank or the fuel won't be able to leave... Well, it depends, I've seen fuel tanks sucked flat, initially I thought the car had bottomed out & the tank was dented..... Then I realized the tank was under vacuum & when I removed the fuel cap the dent popped slightly..... I actually used compressed air & popped a good portion of the dent out...
possible 72 but 73-74 would have the 4 vents on the front that would go to a separator mounted to the shock cross member. then that vents out to the purge vapor can by the radiator. filler neck would be non vented. 55.00 + ups
correct tank for 73-74
Well thanks a lot for all the informations. :twothumbsup:
On my tank 3 nipples were looped and the last one with the longest hose go to a metal line through the car until the front (picture 1).... i suppose something is missing at this point (picture 2)
So my tank is vented...not correctly but still. And i need a non vented Fuel neck filler.
Thanks!
Ok, so the late design vapor separator is still in the car... Cool... Early tank, late separator... It'll work... Rather then looping the vent lines you should hook up each of the four lines from the tank to the four lines on the separator then the single line goes to the front...... Originally it when to a charcoal canister with a purge line but even if you just leave it open the tank will be properly vented...
Thank you very much. :bigthumb:
I will hook them up!
Quote from: 1 Wild R/T on May 02, 2017, 11:17:57 AM
Ok, so the late design vapor separator is still in the car... Cool... Early tank, late separator... It'll work... Rather then looping the vent lines you should hook up each of the four lines from the tank to the four lines on the separator then the single line goes to the front...... Originally it when to a charcoal canister with a purge line but even if you just leave it open the tank will be properly vented...
Forgive me if this is considered hijacking this thread. I have the same issue. I have a line that runs in tandem with my fuel line. I have a 73 Cuda. I dont want to run it a canister.
Quote from: 1 Wild R/T on May 02, 2017, 11:17:57 AM
Ok, so the late design vapor separator is still in the car... Cool... Early tank, late separator... It'll work... Rather then looping the vent lines you should hook up each of the four lines from the tank to the four lines on the separator then the single line goes to the front...... Originally it when to a charcoal canister with a purge line but even if you just leave it open the tank will be properly vented...
Question, where can I direct this vent line and how long does it have to be? Do I have to run it to the fire wall or can I just run it 3 feet or so from the tank and cut the line? I hope that made sense? I want to minimize clutter in my engine bay/NOT BUY MORE PARTS.
Thanks
Husk Challenger. I have some pics of the second line if you want me to post them. Thanks
You could jut not connect anything to the fifth line, just leave it open....
That would work fine....
Hey guys,
I received my new neck filler and i installed it after a refresh of the tank. I have also reconnected the vent lines.
So i went to the gas station and i filled the tank and here's the drama! I had a big leak of gas at the neck filler grommet... :headbang:
The grommet did look good when i put it back in place...but it seems i did wrong!
Did i miss something at the mounting??
I am waiting your advice before order a new one...
Thanks
Quote from: Husk Challenger on June 04, 2017, 06:02:04 AM
Hey guys,
I received my new neck filler and i installed it after a refresh of the tank. I have also reconnected the vent lines.
So i went to the gas station and i filled the tank and here's the drama! I had a big leak of gas at the neck filler grommet... :headbang:
The grommet did look good when i put it back in place...but it seems i did wrong!
Did i miss something at the mounting??
I am waiting your advice before order a new one...
Thanks
The rounded side goes inside the tank. You have to make sure to install it all of the way so the groove is in the lip of the tank.
:iagree: It has to be something easy like that. They should not leak. Maybe the grommet wasn't seated right?
I was helping a buddy with his 71 Cuda and same issue, turns out there is more than one size of filler neck grommet . They look the same but was too loose. Might have been packaged wrong ? For another car? Second one fit great with no leaks, had to use Vaseline to get it in. ( no honeymoon jokes please) :P
Yes, it should be a tight fit.
Well i understand now why there is a leak... my fuel neck grommet doesn t have the rounded part!
It is flat on the both sides.... so it's probably not the good one... :notsure:
I don t have pick but i will show you while i will change it.
Thank you for the fast answers :bigthumb:
Quote from: cuda dad on June 04, 2017, 08:51:27 AM
Quote from: Husk Challenger on June 04, 2017, 06:02:04 AM
Hey guys,
I received my new neck filler and i installed it after a refresh of the tank. I have also reconnected the vent lines.
So i went to the gas station and i filled the tank and here's the drama! I had a big leak of gas at the neck filler grommet... :headbang:
The grommet did look good when i put it back in place...but it seems i did wrong!
Did i miss something at the mounting??
I am waiting your advice before order a new one...
Thanks
The rounded side goes inside the tank. You have to make sure to install it all of the way so the groove is in the lip of the tank.
By the way...when installing it, do you put it first on the neck filler or on the tank?
Quote from: Husk Challenger on June 04, 2017, 12:07:02 PM
By the way...when installing it, do you put it first on the neck filler or on the tank?
In the tank first
Quote from: Brads70 on June 04, 2017, 10:36:01 AM
I was helping a buddy with his 71 Cuda and same issue, turns out there is more than one size of filler neck grommet . They look the same but was too loose. Might have been packaged wrong ? For another car? Second one fit great with no leaks, had to use Vaseline to get it in. ( no honeymoon jokes please) :P
We got our Challenger with a ripped grommet. So had to replace it.
If the neighbors only heard my wife and I in the garage trying to seat the neck into the tank: are you pushing! Wait - it's not in the hole. Push harder! Did you put enough Vaseline on it !? Damn. Why doesn't it fit. ***k!!!
Thank you, i was right...
Quote from: Brads70 on June 04, 2017, 12:09:43 PM
Quote from: Husk Challenger on June 04, 2017, 12:07:02 PM
By the way...when installing it, do you put it first on the neck filler or on the tank?
In the tank first
I can imagine that!! :rofl: :rofl:
Quote from: Marc70challenger on June 04, 2017, 12:10:04 PM
Quote from: Brads70 on June 04, 2017, 10:36:01 AM
I was helping a buddy with his 71 Cuda and same issue, turns out there is more than one size of filler neck grommet . They look the same but was too loose. Might have been packaged wrong ? For another car? Second one fit great with no leaks, had to use Vaseline to get it in. ( no honeymoon jokes please) :P
We got our Challenger with a ripped grommet. So had to replace it.
If the neighbors only heard my wife and I in the garage trying to seat the neck into the tank: are you pushing! Wait - it's not in the hole. Push harder! Did you put enough Vaseline on it !? Damn. Why doesn't it fit. ***k!!!
Maybe a small welding tip inline?
Sent from my SGH-M919 using Tapatalk
Hi Guys,
I have just dismounted my gaz tank in order to change the sending unit seal and the neck filler grommet.
As you can see the old one is really different from the new one... The inner diamter is wider on the old one.
It seems it's going to be pretty tight to put the new one on the tank. I guess lubs will be necessary.
I have another question.
When i installed the tank, i added the 4 vents line to the vapor separator.
But today when i disconnected the vent lines, there was some gaz in!
I thought these lines were for vent the tank..... Is it normal?? Or what may be the problem??
Thanks in advance.
Cedric