C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Fuel line question.

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Old Jan 2, 2008 | 09:37 PM
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Default Fuel line question.

Has anyone ever removed the fuel inlet line from the front of the rail on an L98? If it can be done, can it also be replaced?
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Old Jan 2, 2008 | 10:31 PM
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Are you talking about replacing the line or just unscrewing it from the rail? Both can be done. You need two wrenches to do this correctly. From memory the fittings are US Standard not metric. You have to be careful when replacing to be sure that you don't cross thread the fitting.

Be careful to relieve fuel pressure before doing this and be ready to attach a hose or some form of plug into or onto the line.....it will still leak fuel.
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Old Jan 2, 2008 | 11:24 PM
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I believe we are talking about removing just the fuel feed line from the fuel rail? If so, yes. IIRC, the fittings are 16mm and maybe one other size (14mm?). It's bee a year since I disconnected it.

From the fuel rail fittings, the lines go down under the A/C compressor and make a U-shape and go along the right frame and connect at the fuel filter.

The lines can be replaced. I purchased a good looking used set from a 86. I believe a hydraulic shop can put new rubber lines in place if needed. These line/fitting sizes changed throughout the years.
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Old Jan 2, 2008 | 11:43 PM
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Actually I want to remove the steel line that goes directly into the aluminum rail. I imagine it's something that is put together at the factory and is not meant to come apart. I want to get mine chromed but the chemical used to prep the aluminum will damage the steel and vice-versa.

Last edited by Midnight 85; Jan 3, 2008 at 12:07 AM.
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Old Jan 3, 2008 | 12:02 AM
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Yea, just remove it, had mine power coated... easy... and yes its meant to come apart...
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Old Jan 3, 2008 | 12:10 AM
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Originally Posted by Midnight 85
Actually I want to remove the steel line that goes directly into the aluminum rail. I imagine it's something that is put together at the factory and is not meant to come apart. I want to get mine chromed but the chemical used to prep the aluminum will damage the steel and vice-versa.
I worded this a little different, I'm failing to get across what I mean, my fault, no one else's. I'm going looking for a picture of a fuel rail to see if that will clarify things.
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Old Jan 3, 2008 | 12:18 AM
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[IMG][/IMG]

Okay, look at the fuel rail on the left. The steel line that is attached to the rail right in front is what I want to know about. Can it be removed and if so can it be put back in.
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Old Jan 3, 2008 | 12:45 AM
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I'm pretty sure those lines are machined in the fuel rail. I had my fuel rail apart to polish it and I could not remove the fuel lines from the rail.
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Old Jan 3, 2008 | 12:47 AM
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A GUESS on my part....I would think that this is pressed in at the factory and is not supposed to be pulled apart. Remember that you have 30-45 pounds of fuel pressure (depends on year of car).
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Old Jan 3, 2008 | 01:18 AM
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No, I don't think you can.
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Old Jan 4, 2008 | 09:24 AM
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Maybe you coud remove it, tap the rail and switch to braided lines ??
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Old Jan 4, 2008 | 10:03 AM
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Originally Posted by AGENT 86
Maybe you coud remove it, tap the rail and switch to braided lines ??
Exactly what I did, but with this exception: I tapped the rail. but plugged it, and ran my braided lines to the rear of the fuel rail, as opposed to the front. Made for a much cleaner install, and really cleaned up the front. Also made it much easier to get to the fuel lines, if I ever needed to....

Cheers,
Michael
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Old Jan 4, 2008 | 11:22 AM
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Originally Posted by AGENT 86
Maybe you coud remove it, tap the rail and switch to braided lines ??
We must think pretty much alike on this subject, I was considering just that but I'm afraid I'll mess up the rail getting the line out. How about it
mk842766, how did you get yours out?
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Old Jan 4, 2008 | 02:37 PM
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Old Jan 4, 2008 | 04:37 PM
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Originally Posted by mk842766
Exactly what I did, but with this exception: I tapped the rail. but plugged it, and ran my braided lines to the rear of the fuel rail, as opposed to the front. Made for a much cleaner install, and really cleaned up the front. Also made it much easier to get to the fuel lines, if I ever needed to....

Cheers,
Michael

Do you have a picture?
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Old Jan 17, 2008 | 04:09 AM
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i would like to know this aswell!! im lookin to run braided lines from the rail to the frame and i need to know what size fittings i need to hook -6an line to them!! how much work and money is needed to move to the rear of the rails and is it wroth the time/money?
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Old Jan 17, 2008 | 07:07 AM
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Originally Posted by 355tpipickup
i would like to know this aswell!! im lookin to run braided lines from the rail to the frame and i need to know what size fittings i need to hook -6an line to them!! how much work and money is needed to move to the rear of the rails and is it wroth the time/money?
I'll see if I can get some decent pics...everything is kinda hard to see back there with all the spark plug wires, dist., wiring, etc. Here's what I did....cut the hard line as close as I could in the front, then tapped the fitting, and threaded a bolt in the hole. JB Welded it, and smoothed it out, to look good. I have an 85, so I had the fitting for the cold-start injector coming out the rear of the driver's side rail. Since I've upgraded my ECM, I didn't need the CSV anymore, so rather than just plug it, I got a fitting for some -6AN braided line, and replaced the original fitting. I ran braided line from my fuel hard line at approx. where it starts to come around the frame near the door. This allowed me to also replace the original fuel filter with a smaller inline filter, that would connect with some -6AN fittings also. Further to that, I also took the opportunity to re-plumb the return line. I replaced the fitting in the regulator with a 180 degree -6AN fitting, and ran braided line to the same location as the fuel line. This really helped clean up the front of the motor, as well as getting rid of the original hard tube-rubber-hard tube configuration, which had started to leak. It also makes changing the fuel filter much easier, since it is basically right on the rail now. I don't even have to jack up the car to do it anymore. All the braided line fits behind the fuel rail, and doesn't interfear with anything, so I am quite pleased with it....before you ask....I got all the fittings I needed for the fuel rail and the regulator from Street and Performance...give them a call, and they'll set you right up...

Cheers,
Michael
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Old Jan 17, 2008 | 09:52 AM
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Fantastic, I've been wanting to do this, glad to know that it works and how to get it together!
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Old Jan 17, 2008 | 10:18 AM
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Originally Posted by mk842766
Here's what I did....cut the hard line as close as I could in the front, then tapped the fitting,

Cheers,
Michael
Thanks for the response, I'm going to wait and see how the chroming turns out. If I don't like it then I now know what else I can do.
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