Charger Too
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Which is the correct sending unit for a 1968 Dodge Charger 318 Automatic, A or B? Thanks
1968 Dodge Charger Fuel Sending Unit
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BeepBeepRR
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"A" looks right to me. 5/16 tube single line to engine. Bob Horman
70 sublime
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Not B
Charger Too
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How do I determine which one I need? The filler tube has a small tube at the top for a small hose. Is this the return line, or does a return line go back to the engine? I also need to purchase the correct fuel tank. The car was purchased new in Illinois, so I assume I need a tank without emissions. Unfortunately, I don't have any of the original parts to make comparisons. Thanks!
Here’s what a NOS B-body 5/16” sender looks like, and no, it’s not for sale.
70 sublime
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The small tube on the filler neck ( the filler neck that mounts up inside the 1/4 panel ) is the gas tank vent line It will usually have a metal line clipped tot he side that follows the neck down to the trunk floor then goes through it's own hole to vent inside the rear frame rail
BeepBeepRR
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You might want to purchase if you do not have one a fuel line ground strap that way the sender gets grounded and the fuel gauge should work correctly.
they sell 2 lengths long and short.
they sell 2 lengths long and short.
1969superbee451
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I have three factory Chrysler 5/16 sending units removed from 68-69 Chargers in good working order if you're in need of one. All tested and in working condition.
Triplegreen500
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Run it below 1/4 tank and pull your existing unit. It won't make a mess. You can do it with the rear of the car on frame jackstands, with the axle drooping. I replaced the one in my '70 last year this way - no mess, no drips, plenty of space. All you need is a large flathead screwdriver and a hammer to remove the retaining ring, and either a normal flathead screwdriver or a 5/16" screwdriver to undo the hose clamp from the unit.
FWIW my '70 was a 5/16", no-return setup. Look at your sender and you can see if you have a return or not - count the hoses. One hose = no return. Two hoses = yes return. This is hoses inside the sending unit retaining ring - as noted above, the smaller hose on the filler neck is the VENT hose, not a fuel pressure return hose.
FWIW my '70 was a 5/16", no-return setup. Look at your sender and you can see if you have a return or not - count the hoses. One hose = no return. Two hoses = yes return. This is hoses inside the sending unit retaining ring - as noted above, the smaller hose on the filler neck is the VENT hose, not a fuel pressure return hose.
Charger Too
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Excellent explanation, but unfortunately most of my parts were stolen so I don't have anything to look at. I need to purchase a new tank. I think the sender marked A (top photo) is the correct one. The filler tube has a place for a small vent line. I assume that goes to the tank. Most tanks I find for sale have two vents. Where does the other vent line go? Is that what I need?
Triplegreen500
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The line(s) going to the sending unit will be 5/16".
Vent tube is more like 3/4".
Look under your car. Are there one, or two, "fuel hoses" going to where the sending unit would be (center vehicle, in front of the rear axle)? That will tell you if you need one for, or without, a return line.
Vent tube is more like 3/4".
Look under your car. Are there one, or two, "fuel hoses" going to where the sending unit would be (center vehicle, in front of the rear axle)? That will tell you if you need one for, or without, a return line.
Charger Too
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Charger Too
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New trunk and floor pans have been installed so no hoses are present.
Triplegreen500
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Hard lines should still be there. One small hard line running to the engine = no return. Two hard lines = yes return. They look like brake lines.
The vent line doesn't go to chassis at all, only from the filler neck to the tank.
The vent line doesn't go to chassis at all, only from the filler neck to the tank.
He's got an original 318 car = single 5/16" fuel line.
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