Quick fuel line ?
Thread Starter
Intermediate
Joined: Feb 2018
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From: WV
Quick fuel line ?
On my ‘88 both the feed and return are the same size. I just wanted to confirm before I put my hoses together. Which is which.
Can anyone confirm that the line closest to the outside of the car is the feed and the inner line is the return?
Can anyone confirm that the line closest to the outside of the car is the feed and the inner line is the return?
Last edited by zo6byrd; Feb 22, 2018 at 07:29 PM.
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From: Clearwater Florida
Thread Starter
Intermediate
Joined: Feb 2018
Posts: 34
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From: WV
The gen I sbc set up has been out for a year. Just need to hook the fuel lines up so I can start the new setup. My fuel lines end right under the pass area by the fuel filter. Can anyone take a peak to see which is feed and return?
Last edited by zo6byrd; Feb 23, 2018 at 02:55 AM.
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Since you mention being apart for some time I'll not toss you a WAG.
You should be able to follow the line from the filter up and forward to resolve it. If you've gone so far as to put fuel in the tank put a hose on them and cycle the pump.
If you're referencing the pipes at the fuel rails follow the pipe to the regulator. It should be obvious I believe, pipe to regulator and the return should exit the end of the rail.
You should be able to follow the line from the filter up and forward to resolve it. If you've gone so far as to put fuel in the tank put a hose on them and cycle the pump.
If you're referencing the pipes at the fuel rails follow the pipe to the regulator. It should be obvious I believe, pipe to regulator and the return should exit the end of the rail.
Last edited by WVZR-1; Feb 23, 2018 at 07:04 AM.
Thread Starter
Intermediate
Joined: Feb 2018
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From: WV
Since you mention being apart for some time I'll not toss you a WAG.
You should be able to follow the line from the filter up and forward to resolve it. If you've gone so far as to put fuel in the tank put a hose on them and cycle the pump.
If you're referencing the pipes at the fuel rails follow the pipe to the regulator. It should be obvious I believe, pipe to regulator and the return should exit the end of the rail.
You should be able to follow the line from the filter up and forward to resolve it. If you've gone so far as to put fuel in the tank put a hose on them and cycle the pump.
If you're referencing the pipes at the fuel rails follow the pipe to the regulator. It should be obvious I believe, pipe to regulator and the return should exit the end of the rail.
Last edited by zo6byrd; Feb 23, 2018 at 11:35 AM.
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OE is a fabrication to the filter then filter to fuel rail. Return is a fabrication to the same location as the filter but there's a coupling there and a separate fabrication to the fuel rail.
Didn't see your added snapshots!!
Your 'black' if Saginaw to -AN appears to be for a 5/16 tubing arrangement and the 'blue' Saginaw to -AN appears to be for a 3/8 tubing arrangement. The filter inlet/outlet for the OE filter is Saginaw M16x1.5. Un-thread the 'black' from the fuel line and confirm that the original on the return is actually also a Saginaw termination.
Last edited by WVZR-1; Feb 23, 2018 at 11:55 AM.
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Thread Starter
Intermediate
Joined: Feb 2018
Posts: 34
Likes: 1
From: WV
This is for something that's 'other than stock' for fuel supply I guess? If yes - do as you wish!!
OE is a fabrication to the filter then filter to fuel rail. Return is a fabrication to the same location as the filter but there's a coupling there and a separate fabrication to the fuel rail.
OE is a fabrication to the filter then filter to fuel rail. Return is a fabrication to the same location as the filter but there's a coupling there and a separate fabrication to the fuel rail.
The only thing I’m trying to figure it out is which line is the feed and which is the return. Nothing more nothing less. Just need to know so I can plug them in the appropriate spots on the corvette filter/regulator. Not trying to turn this into a game of 50?s.
Thread Starter
Intermediate
Joined: Feb 2018
Posts: 34
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From: WV
This is for something that's 'other than stock' for fuel supply I guess? If yes - do as you wish!!
OE is a fabrication to the filter then filter to fuel rail. Return is a fabrication to the same location as the filter but there's a coupling there and a separate fabrication to the fuel rail.
Didn't see your added snapshots!!
Your 'black' if Saginaw to -AN appears to be for a 5/16 tubing arrangement and the 'blue' Saginaw to -AN appears to be for a 3/8 tubing arrangement. The filter inlet/outlet for the OE filter is Saginaw M16x1.5. Un-thread the 'black' from the fuel line and confirm that the original on the return is actually also a Saginaw termination.
OE is a fabrication to the filter then filter to fuel rail. Return is a fabrication to the same location as the filter but there's a coupling there and a separate fabrication to the fuel rail.
Didn't see your added snapshots!!
Your 'black' if Saginaw to -AN appears to be for a 5/16 tubing arrangement and the 'blue' Saginaw to -AN appears to be for a 3/8 tubing arrangement. The filter inlet/outlet for the OE filter is Saginaw M16x1.5. Un-thread the 'black' from the fuel line and confirm that the original on the return is actually also a Saginaw termination.
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If you had posted the snapshots in your initial request there would have been 'no issues' - you certainly made it seem that you were asking questions about the fuel rail on the engine.
Everything that followed your original post is/has/and will always be the the 'self inflicted' results of poorly asked questions.
Your snapshots don't seem to hint that. What size HEX fits each fitting? Why not just take an SAE end wrench and confirm that. Remove the 'black' Saginaw appearing coupling and let's see what the nut looks like?
Do you have the pipes that you've removed from the fuel rail to the filter area?
A later fuel system does show that very likely both line fittings are M16x1.5 on both pipes from the rear to the front so the 3/8 would seem likely. If that's so it would seem that the 'blue' adapter should likely fit both of the flare nuts provided they were Saginaw and not just SAE inverted flare.
In most of the somewhat 'generic' images of fuel line routing hint that the outer is supply.
If you have the FSM look at 6C-4 and see if that helps you. Do you have the FSM?
Last edited by WVZR-1; Feb 23, 2018 at 12:21 PM.
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From: WV
Just put a wrench on both and they are 16mm. But I already suspected that.
i do not have the rest of the line or the original engine.
i literally just need to do the fuel lines from the factory feed and return to the vette filter/reg and it’ll be ready to fire up finally(5.3 ls swap)
i do not have the rest of the line or the original engine.
i literally just need to do the fuel lines from the factory feed and return to the vette filter/reg and it’ll be ready to fire up finally(5.3 ls swap)
Last edited by zo6byrd; Feb 23, 2018 at 12:46 PM.
Thread Starter
Intermediate
Joined: Feb 2018
Posts: 34
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From: WV
If you had posted the snapshots in your initial request there would have been 'no issues' - you certainly made it seem that you were asking questions about the fuel rail on the engine.
Everything that followed your original post is/has/and will always be the the 'self inflicted' results of poorly asked questions.
Your snapshots don't seem to hint that. What size HEX fits each fitting? Why not just take an SAE end wrench and confirm that. Remove the 'black' Saginaw appearing coupling and let's see what the nut looks like?
Do you have the pipes that you've removed from the fuel rail to the filter area?
A later fuel system does show that very likely both line fittings are M16x1.5 on both pipes from the rear to the front so the 3/8 would seem likely. If that's so it would seem that the 'blue' adapter should likely fit both of the flare nuts provided they were Saginaw and not just SAE inverted flare.
In most of the somewhat 'generic' images of fuel line routing hint that the outer is supply.
If you have the FSM look at 6C-4 and see if that helps you. Do you have the FSM?
Everything that followed your original post is/has/and will always be the the 'self inflicted' results of poorly asked questions.
Your snapshots don't seem to hint that. What size HEX fits each fitting? Why not just take an SAE end wrench and confirm that. Remove the 'black' Saginaw appearing coupling and let's see what the nut looks like?
Do you have the pipes that you've removed from the fuel rail to the filter area?
A later fuel system does show that very likely both line fittings are M16x1.5 on both pipes from the rear to the front so the 3/8 would seem likely. If that's so it would seem that the 'blue' adapter should likely fit both of the flare nuts provided they were Saginaw and not just SAE inverted flare.
In most of the somewhat 'generic' images of fuel line routing hint that the outer is supply.
If you have the FSM look at 6C-4 and see if that helps you. Do you have the FSM?
i do have an fsm, trying to remember where I put it since it’s been a few months.
Last edited by zo6byrd; Feb 23, 2018 at 12:44 PM.
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A new 'user ID' for maybe armybyrd?
The yellow car and the 5.3 sounds familiar!!
I am thinking that but maybe you just send some alcohol from the tank unit supply that should be easily ID'd as a confirmation. The lines do still exist at the tank unit? I looked at another later fuel line image and it actually seems to have contradicted that thought. I like the idea of an alcohol pour for confirmation. It's something you'd like to do just once. Me, Joe, John, Jim and Bill's cousin could give you very contradictory information. A DIY I'd think wise!!
Last edited by WVZR-1; Feb 23, 2018 at 01:21 PM.
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From: Fairfax Virginia
I have a 1988 Coupe and it does have two fuel lines that are the same size. The two lines follow each other from just forward of the right rear wheel up to where the fuel filter's original location was.
The INNER line on my car is the return to tank.
The OUTER line is the supply line feeding into the fuel filter from the fuel pump. By outer line I am referring to its position if you are looking down over the car from the top.
I will go measure the fuel lines diameter just to be sure. They are indeed 3/8" O.D., I just measured them
I have seen people use Blue for fuel supply and Black for fuel return lines, unfortunately I am not aware of any "standard" that does this officially.
Good Luck getting the fuel issues sorted out and getting your Corvette back on the road where it belongs!
The INNER line on my car is the return to tank.
The OUTER line is the supply line feeding into the fuel filter from the fuel pump. By outer line I am referring to its position if you are looking down over the car from the top.
I will go measure the fuel lines diameter just to be sure. They are indeed 3/8" O.D., I just measured them
I have seen people use Blue for fuel supply and Black for fuel return lines, unfortunately I am not aware of any "standard" that does this officially.
Good Luck getting the fuel issues sorted out and getting your Corvette back on the road where it belongs!