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Replacing fuel hardlines - any pointers?

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Old 03-15-2024, 06:12 AM
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Car: 92 Camaro RS
Engine: V6 3.1
Transmission: 5 speed
Replacing fuel hardlines - any pointers?

I am preparing to replace the long fuel hardlines that go from the fuel filter/tank to the engine bay. I do have the replacements and they are one piece (both supply and return). Under the car I already undid all the fasteners that hold the lines but I don't think feeding a new lines is going to be an easy task. There is a crossmember (or whatever it is called) that goes under transmission and lines go between the body and the crossmember. I am assuming I will have to remove it, correct? Also, how do I feed the lines into the engine bay? So far, I am just scratching my head on how to approach this project and the only solution I came up with is to cut the hardlines in half or in three pieces and feed the smaller parts as this would be easier. any pointers or ideas would be appreciated. This is for a V6 engine so at least I do not have to go over the transmission. It is just driver side back (fuel pump) to driver side engine bay.
Old 03-15-2024, 11:46 AM
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Re: Replacing fuel hardlines - any pointers?

If the lines are in one piece, I would leave them that way. Are you doing this on a lift or jack stands? A lift makes it dramatically easier as you can maneuver the lines a hell of a lot easier. Yes, you'll have to remove the trans cross member, which isn't difficult.
Old 03-15-2024, 11:48 AM
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Re: Replacing fuel hardlines - any pointers?

Unfortunately, I only have the jack stands. Actually, I lifted the driver side of the car and put the wheels on a ramps. I can slide under but yes, the space is tight.
Old 03-15-2024, 08:15 PM
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Re: Replacing fuel hardlines - any pointers?

That's going to definitely make it interesting. I removed mine in the air and it was relatively simple. I have no decent advice for the ground. Sorry.
Old 03-16-2024, 05:13 PM
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Re: Replacing fuel hardlines - any pointers?

I spent most of the day today pulling the old lines and installing new ones. I replaced total of 3 hard lines under the car: fuel supply, fuel return and rear brake line. This plus the small partially flexible line that goes between the fuel pump and fuel filter. Pulling old lines is easy as you don't really need to worry about them. The brake line actually snapped in half so was super easy. :-) I only have the driver side of the car on the ramps so the space was tight. I didn't remove the transmission crossmember. Just undid the two bolts on the driver side and loosen the passenger side. This allowed the crossmember to drop about an inch or so so I could remove the lines. The transmission was supported of course. As to the installation, the fuel supply line went first. I pulled it from the engine bay down under the car. This was easier as the line is shorter of the two. The fuel return line had to go from the bottom but since it is thinner, it was easier to flex when needed. It may be possible to route it from the engine bay but the car was parked too close to the garage that I couldn't navigate the long line without hitting the garage wall. The brake line also went from the engine bay down under the car. This was due to the relief spiral thingy at the master cylinder end. My son helped with line routing so one person was pulling when the other one was pushing. All is connected, nothing is leaking but I still have few fasteners to attach to the frame. I am just not sure it is going to be possible to neatly tie the lines together as it was done from the factory. The aftermarket line bends are not perfect so I will have to come up with some solution for that in a couple of places. Otherwise it wasn't a terrible project but would definitely be a lot easier if the car was on the lift.
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