'68 Cuda Gas Tank Sending Unit

[MrJLR]

I'm seeing 2 different units while looking to buy a new one....

Some are 5/16" outlet and some are 3/8" outlet.....

Anyone know the correct part I need?

Thanks!
Jeff


:coffee2:

 

[RedFish]

If the sender tube was 3/8.. the entire line coming to the fuel pump would also be 3/8. So, raise the hood and look at right frame rail. Unless you car was a big block build, I expect you'll find 5/16 tube and hose connecting to fuel pump.
And by the way... If you see the factories crimped clamp on that short rubber tube while looking there, you're seeing a rubber hose that is nearly 50 years old. It'll be a good idea to replace that with new.

 

[MrJLR]

If the sender tube was 3/8.. the entire line coming to the fuel pump would also be 3/8. So, raise the hood and look at right frame rail. Unless you car was a big block build, I expect you'll find 5/16 tube and hose connecting to fuel pump.

It was originally a /6....now a 318 - swapped by the P.O....

 

[jdsduster]

5/16,rubber also at the sender that should be addressed

 

[toolmanmike]

And just a word of caution, the newly manufactured senders usually are not accurite. Search around for threads about this if it's a issue.

 

[MrJLR]

And just a word of caution, the newly manufactured senders usually are not accurite. Search around for threads about this if it's a issue.

That's the reason I'm changing it.....full is at 3/4 and empty is at 1/4 !

 

[MrJLR]

So this one should be correct?

1968 Barracuda sending unit

:burnout:

 

[toolmanmike]

Looks like the one.

 

[MrJLR]

Looks like the one.

Thank you everyone!

Ordered!

 

[krazykuda]

most had the 5/16" line stock.

some people like to upgrade to 3/8" for more capacity...

 

[MrJLR]

most had the 5/16" line stock.

some people like to upgrade to 3/8" for more capacity...

That makes sense.....mine's just a 'lil 'ol 318.....!

:burnout:

 

[jdsduster]

be prepaired to tweek on it several times.they are known to be VERY INACCURATE

 

[jdsduster]

That makes sense.....mine's just a 'lil 'ol 318.....!

:burnout:

if your fuel line is 5/16 you will gain nothing going with a 3/8

 

[halifaxhops]

Reuse your old lock ring!

 

[MrJLR]

be prepaired to tweek on it several times.they are known to be VERY INACCURATE

What is the procedure for "tweeking" them?

 

[jdsduster]

you will have to bend the stops or and the float arm.trial and error

 

[jdsduster]

thing about it is you get one end accurate then the other if off.pos.another rocket science **** up.if you have the orig.i would send it off the get rebuilt

 

[MrJLR]

thing about it is you get one end accurate then the other if off.pos.another rocket science **** up.if you have the orig.i would send it off the get rebuilt

Who rebuilds them?

 

[halifaxhops]

Just hook up the new one when it is out and go full/empty with the arm, adjust it then, not rocket science to do.

 

[MrJLR]

Do I have to drop the tank to install?
Doesn't look like it but....????

 

[halifaxhops]

My dart it does not, KrazyKuda will know.

 

[ESP47]

Shouldn't have to. Just jack up the rear, remove one of the wheels. Remove the sending unit wire and fuel line to sender. Use a flat head screwdriver and hammer to tap the lock ring counter clockwise until it turns. Remove sender and install same way.

I'd bet your float is full of fuel. If the car doesn't have to be on the road that same day, you can most likely repair the float by letting the fuel drain out and then soldering up the pin hole in it that allowed fuel to leak in. Then use an ohm meter and check the resistance while you move the float arm up and down. Might as well replace the sock while you're at it. Think they can be had for $6 on rockauto.

 

[jdsduster]

Just hook up the new one when it is out and go full/empty with the arm, adjust it then, not rocket science to do.

the problem is the ohms are ok at empty and full,its in between thats all over the place

 

[halifaxhops]

Slowly move it and see if the gauge corresponds.

 

[krazykuda]

My dart it does not, KrazyKuda will know.

We just replaced the whole tank and sending unit on our 71 Valiant, it's been a while since I tried to do them in the car.

I think I've been able to wrestle them with the tank in, you just have to flip them around to get the different bends of the tube out.