Back in 2020 my car was supposed to be fixed for the fuel pump leak recall, but the dealership here sucked and denied me even though the fuel smell was bad. Anyway, I purchased a full set of fuel lines in 2021 from rockauto. I just installed it, and i was looking back at grabbing a spare set since its kind of a pain to route and i could see these breaking. I can't find them anywhere! I'm specifically looking for:

1. Line within the driver and passenger tank that goes between the pump and the crossover
2. The crossover line
3. The line from the driver side pump to the frame rail line
4. the line at the engine to the fuel rail.

Does anyone make an aftermarket set??

I figure the vac/pressure lines at the top of the tanks can be easily replaced with a rubber fuel line and some hose clamps so no big deal on those...

 

Good luck on the crossover tube. They are hard to find these days

 

Someone makes a kit with braided lines and AN fittings. If you google it you should find it.

 

LH Tank - Pipe, Fuel Feed and Return Pipe, Pump to Crossover PN 19436042 (2004-2013) - $132.28 @ Van GM Parts Center
RH Tank - Pipe, Fuel Feed and Return Pipe, Pump to Crossover PN 19431776 (2004-2013) - Discontinued, used examples on eBay for $300.00

Hose, Crossover Pipe w/ Fuel Feed and Return Pipe (Inside Crossover) (2003-2013) PN 19436041 - $287.34 @ Van GM Parts Center

Hose - PN 25948212 (2004-2013) - Discontinued, used examples on eBay for $350.00

Hose Assembly, Fuel Feed Front (2005-2013) PN 10324452 - $71.44 @ GM Parts Giant
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The kit.

https://grimesmotorsports.com/contac...-crossover-kit

 

What is the purpose of this kit, if not for replacing the crossover tube? The kit description states: "we do not eliminate the upper OE crossover as it is used for fuel transfer as your filling up the car."

 

Because a lot of times the actual fuel lines inside the crossover tube break upon removal and OEM replacements are getting very hard to find.

 

If those lines break, then how does the fuel transfer work while filling up? I feel like I'm missing something

 

It doesn't transfer during filling. Transferred after the key is on and car running so jet pump function works to equalize tanks.

 

So you're saying that the wording on Grimes' kit is wrong? Even if that's the case, I still don't understand why their kit requires the use of the crossover tube if it's meant to replace the lines inside the tank, which connect to the crossover tube.

 

The large corrugated stainless tube between the 2 tanks IS the fuel fill hose that overflows fuel to the right tank after the left tank has filled. When you are refueling your tank, gas is not going through the tiny 1/2" feed tube....it is going through that large pipe. If your gas gauge reads half empty, the left tank is full and the right tank is empty.

The hard plastic fuel feed lines inside the crossover tube and in each tank are for pressurized fuel delivery to the engine.

When running, the right tank is emptied first, sending fuel through the hard feed line via a venturi siphon pump over to the left tank's electric pump and on to the fuel rail.

 

Thanks, I saw those used ones on ebay. What I was looking for is a new set since my old set isnt broken (yes, I saved them) and its probably as good as any used unit.

I did a LOT of googling after posting this and I have a plan...the two lines in each tank can be replaced with quick connect GM fittings + AN fittings as needed. The fittings run between the pump (quick disconnect) and the crossover (AN). The lines within the tank and crossover tubing will likely have to be a bit longer than normal (need to take care not to trigger float/bind floats) so you have the space necessary to remove. The jet pump has two quick disconnects, the main has one. The main has a line coming over from the jet pump that flows into the pump housing, no connection.

Thinking:
larger line - quick disconnect x2 , 2 pairs of AN fittings
smaller line - quick disconnect x1, 2 pairs of AN fittings.
crossover line in both sizes, use the other side of AN fittings from above.

2x Quick disconnect from the pump to the frame rail line
2x quick disconnect from frame to fuel rail.

This is now my new plan - anyone else who gets this done before me, please post in this thread the results/pics of what was done. I may test it out on the J line from the fuel pump to the frame line because i did not buy that one previously and mine looks a little crusty. Its easy to access without dropping the tanks though so i might hold off until i see leaks.

Oh, also all the vent lines i plan to just run rubber fuel hose + clamps if they fail. they should see barely any pressure and connect L,R, and charcoal canister above the tanks.

This all assumes the jet pump remains available - I may pick a spare up just in case. I am fairly certain the supply pump wont be an issue as there are lots of aftermarket pumps.

 

I saw this in my search. I dont want to drill my tank and I think this addresses only the lines in the crossover pipe? I'd like to see pics of their "internal" version.

For the other poster: They retain that external crossover tube but replace the nylon inners. I would like to see a replacement for the external tube too.

 

If the internal tubes break, the driver side tank will still work fine. The passenger tank will not be able to transfer to the driver side and will just hold stale gas. the internal tubes are only to feed and power the jet pump in the passenger tank and return fuel into the driver tank.

edit. thinking some more... this is only true if the leak is small, i guess. If the crossover line to the jet pump bleeds enough pressure from the main, it might not be able to pressurize the fuel rail. i dont have a pump curve handy for the main pump so idk.

 

I think it does... The crossover tube that contains the two internal tubes transfers it. i think as youre filling the tanks, when it hits the level of the crossover tube, it drips over into the passenger tank.

nvm, this was answered in an earlier comment.

 

Do not use lines below. they are "marginal" for fuel... will post the correct lines once i figure the right ones out.
i'll update when finished but this is my purchased items for the J line at the fuel pump and the line to the fuel rail from the frame.

EAR-961965ERL - male quick connect (fuel tank side) x1
EAR-306006ERL - -6 AN hose; 6 ft
EAR-751166ERL - female quick connect, locking nut (engine bay side) x2
EAR-800106ERL - hose to -6 AN (2 for engine side, 1 for fuel tank side) x3
EAR-804606ERL or EAR-806106ERL - 60 or 45 degree hose to -6 AN; will figure out which one needs on the fuel pump side. eyeball says 60, ordered 45 for Justin Case
EAR-991966ERL - female quick connect, clamp style (fuel tank side) x1


thought of going -8AN but if i start making enough power to need it, ill redo the fuel system since the rest of the lines aren't huge anyway.

 

Here is a kit that does not require drilling your gas tank.
https://m2performancegroup.com/produ...wVZDvW23SAzcsS

I installed this kit and the only issue to watch out for is your level float getting hung up.

This thread talks about that:
https://www.corvetteforum.com/forums...post1608197951

 

Does the C7 have the same fuel system design?

 

Yes, looks like it. Crossover tube between two saddle tanks. If theres a x-tube, id assume they also use a jet pump.

Looks like a good kit for the crossovers. There are actually 3 pairs of lines and two supply lines that I was looking into - one pair each in the tanks from/to the pumps, one pair in the crossover tube (which this kit replaces), and the supply from the tank to hard line on the frame and the last one from the frame to the injector rail.


ANYWAY quick update. My dumb *** ordered auto-flex lines from EARLS when I should've been ordering a different line type for fuel supply. DANGIT. Going to be ordering the right one and will post that after.

 

Also, for anyone doing a DIY for the crossover tube - I had the benefit of doing it with the trans and diff out, but protip - drop BOTH tanks when doing it. the little wiggle from both tanks being off gives you just enough to move the crossover tube. Also, the driver side gas fill tube binds you up a lot so loosen that worm gear a lot and take your time wiggling it around.

also, dont be a dumbass and forget to fish over the fuel pump wire on the driver side, leading to having to drop the tank a second time.