Fuel lines. - Impala Tech
Troubleshooting Diagnosing problems

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post #1 of 4 (permalink) Old 06-28-2020, 04:39 PM Thread Starter
 
 
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Fuel lines.

Have a 68 impala and I have been trying to remove the fuel line connecting to the carburetor. It will not budge and all attempts to loosen it have failed. Any advice?
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post #2 of 4 (permalink) Old 06-28-2020, 05:08 PM
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Welcome to the Team!

Both the steel double flared compression fitting on the tube and the carburetor inlet are made of steel. You use a one inch open end wrench to hold the inlet and a tubing wrench to loosen the nut. A tubing wrench looks like this:

https://www.lowes.com/pd/Crescent-3-...E&gclsrc=aw.ds

Because the steel inlet and the pot metal carburetor are made of very dissimilar metals they will seize (chemically weld themselves together) If you attempt to remove thaqt steel inlet it will rip the threads out of the carburetor body. If you do destroy the carb body you can find a repair pieceto attempt to save the carb (though in my experience they frequently still leak):

https://quadrajetparts.com/short-inl...spm9906d0ia1h6

Big Dave
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post #3 of 4 (permalink) Old 06-29-2020, 09:48 AM Thread Starter
 
 
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Originally Posted by Big Dave View Post
Welcome to the Team!

Both the steel double flared compression fitting on the tube and the carburetor inlet are made of steel. You use a one inch open end wrench to hold the inlet and a tubing wrench to loosen the nut. A tubing wrench looks like this:

https://www.lowes.com/pd/Crescent-3-...E&gclsrc=aw.ds

Because the steel inlet and the pot metal carburetor are made of very dissimilar metals they will seize (chemically weld themselves together) If you attempt to remove thaqt steel inlet it will rip the threads out of the carburetor body. If you do destroy the carb body you can find a repair pieceto attempt to save the carb (though in my experience they frequently still leak):

https://quadrajetparts.com/short-inl...spm9906d0ia1h6

Big Dave


Thanks for the info but I already have the tubing wrench and that still didn't work. I fear I may have to break the fuel line and completely replace it. It is stuck on there pretty good and I'm afraid the strip it. I may just replace carb as well but I haven't fully decided on that.
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post #4 of 4 (permalink) Old 06-29-2020, 11:11 AM
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If you haven't rounded the flair nut it might just need some more pressure. Granted the fuel line is cheap compared to the carb, but if your carb is the original it probably needs to be rebuilt anyway. If you round the flair nut the next tool is a pair of vise grips, but by the time you get to this point the fuel line is hosed anyway.
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