fuel supply line is leaking?

1998 CHEVROLET MONTE CARLO
147,000 MILES • 3.8L • 2WD • AUTOMATIC
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JOE1953
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the fuel supply line is leaking at the fuel rail when the engine is running. do i need to replace the fuel line or the o-ring?
Dec 21, 2024 at 3:29 PM
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JACOBANDNICKOLAS
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Hi,

Which is the one leaking? Is it the supply or return? See pic below.

If it is the supply, inspect the connector for cracks or the hose for any damage. If everything appears to be okay, you should be able to simply replace the o-ring.

Let me know.

Joe

See pic below.
Dec 21, 2024 at 9:46 PM
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JOE1953
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the supply, how do I replace the O-ring?
Dec 21, 2024 at 10:07 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
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  • ASE Certified Mechanic
Often times, the connector is replaced. They make replacement parts that get installed onto the existing hose. On the other hand, once the connector is off, you will see the 0-ring inside the connector. To replace it, I always use a pic to remove the old one.

One out, you have to get the same size o-ring for replacement. If it isn't the same as the original, it will leak. There is a good bit of pressure on it.

Once you get the new one, it's nothing more than reinstalling it into the connector. I like to put (don't laugh) a little Vaseline on the new o-ring to help prevent the chance of damage when installing it.

Let me know if that helps.

Joe

PS: Merry Christmas.
Dec 23, 2024 at 8:02 PM
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JOE1953
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how do I replace the connector? Is it better to replace the connector or the o-ring? What kind of pick I need to replace the o-ring? Merry Christmas.
Dec 23, 2024 at 9:27 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
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Hi,

If the connector is still good and the only issue is the o-ring, I would replace that. As far as a pic, I attached a picture below of a mechanic's pick set. If you have a Harbor Freight nearby, they sell a smaller set for under 5 dollars.

Let me know.

Joe

See pic below.
Dec 23, 2024 at 9:31 PM
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JOE1953
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I have the first 3 and the last pick in my toolbox, are those o-ring hard to replace? the leak not bad how would fuel-resistant sealant work on the connector?
Dec 23, 2024 at 10:15 PM
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STRAILER
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Those O-rings are not bad, any of those picks should work.
Dec 25, 2024 at 10:17 AM
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