Title change: modding L36 fuel rail to fit L67 topend - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-26-2007, 05:11 PM   #1
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Default Title change: modding L36 fuel rail to fit L67 topend

This is a spinoff of this thread:
http://www.bonnevilleclub.com/forum/...ic.php?t=89143

I want to be able to put an L67 fuel rail on my 1998 LeSabre L36. I also want it to be quickly and easily "swappable" back to the L36 fuel rail.

(Ignore for the moment clearance issues over the UIM, vacuum to the FPR, etc.; I'm only interested for now in what I would have to do to modify the fuel lines)

It need not be in any way "blingy," but it does want to be inexpensive.

So, help me brainstorm a solution. What do I need to do? What pieces and parts do I need?
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Old 11-26-2007, 05:42 PM   #2
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I really think you could just use a tubing bender on the L67 fuel lines.
Only two of the lines that would run torward the top of the L36 UIM look like they will be an issue. If they were gently bent in, the top portion could be bent up and you would have enough clearance.
Those lines are plenty malleable and you wouln't have to bend then much.

Only thing you would need is a cheap tubing bender and an extra L67 fuel line.

Other people have cut, flared and used high pressure fuel line/clamps. That just seems a little unsafe though..
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Old 11-26-2007, 06:10 PM   #3
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Mike,

I think I understand what you're telling me here; that is, how to modify the L67 rail to fit over the L36 UIM. But this is NOT what I'm asking about...

Let'* assume the fuel rail swap would be part of an entire top-end swap; so, I want to know: what combination of fittings, connectors, etc. would I need to be able to swap back and forth between totally unmodified L36 and L67 fuel rails.
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Old 11-26-2007, 07:01 PM   #4
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Quote:
Originally Posted by agrazela
Mike,

I think I understand what you're telling me here; that is, how to modify the L67 rail to fit over the L36 UIM. But this is NOT what I'm asking about...

Let'* assume the fuel rail swap would be part of an entire top-end swap; so, I want to know: what combination of fittings, connectors, etc. would I need to be able to swap back and forth between totally unmodified L36 and L67 fuel rails.
Ohhhh. Gottcha.
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Old 11-26-2007, 07:46 PM   #5
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OK, let me illustrate what I'm starting with:
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The line that runs to the rear of the engine is 3/8" OD, while the line that runs to the front is 5/16" OD.

I want to figure out how to mod these lines to fit an L67 fuel rail, as illustrated here by Mike:
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Well, let'* start with the L67 fuel rail end...

Anyone know if this:
http://www.amazon.com/Dorman-800058-...6119379&sr=1-1

Will attach to the L67 fuel rail? If not, anyone got a part number for something that will?
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Old 11-26-2007, 09:07 PM   #6
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The only connections I know of, other than stock, that will connect to the L36/L67 fuel rail are:
Russell 640850 -6AN to 3/8
Russell 640860 -6AN to 5/16

But they are 'blingy' and you would have to do an AN setup..
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Old 11-26-2007, 09:14 PM   #7
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OK, those Russel fitting seem alright...what do I do to go from those to the fuel lines?
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Old 11-26-2007, 09:17 PM   #8
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Theres a good amount of info on how to hook AN lines up in the engine bay of a W-body in this thread.
I believe I've come across some more discrete AN line but it'* all expensive.
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Old 11-26-2007, 09:42 PM   #9
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There was some good info in there about hooking up AN to hard fuel line using Swagelok fittings, but I didn't see anything in there about a way to connect AN to vinyl fuel line...it is my undertsanding that our cars don't have hard fuel line.
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Old 11-27-2007, 12:53 AM   #10
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Dorman makes a complete line of nylon (plastic) fuel line repair stuff. You can build or modify the factory lines however you want with o.e. quality stuff.

Search Dorman fuel line repair. You'll find the $200+ kit, but all the parts in the kit are available indiviually.
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