LB9 Fuel Line Question
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Junior Member

Joined: Sep 2018
Posts: 12
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From: Orange County
Car: 1990 Pontiac Firebird Formula
Engine: 305 TPI
Transmission: 5 Speed Manual
LB9 Fuel Line Question
Working on a 1990 LB9 5.0 TPI rebuild and it looks like I'll need to replace a very specific part of fuel line that I don't think I can get an OEM part for, or at least I don't know the part number or proper name for it.
The old steel line was bent really badly when removing the engine and the threaded part of the line has seized due to rust from a leaky water coolant leak from the thermostat neck, so it needs to be replaced somehow.
This line goes across the front of the engine block and down to the driver side where it connects to the main fuel lines that go across the body. The total length of pipe to replace would be around 12-15 inches. Flexible rubber hoses are out of the question for this short run due to space constraints and due to the heat that comes off being right next to the cylinder heads and block; I like explosions as much as the next pyro, but I'd rather keep them controlled within my engine block and not in my engine bay.
The bends on this piping are extremely tight, and with the line being 3/8", it would be extremely tough to fabricate with my noob hands.
I've done a little searching with Jegs, Summit, and Rock Auto, but I'm not finding an exact match for the fuel line, at least one that's already fabricated. Junkyarding is a possibility, but all that I see out in my area are the V6s because the V8s get picked apart faster than my dog tearing up a new stuffed animal.
Any help is appreciated.
The old steel line was bent really badly when removing the engine and the threaded part of the line has seized due to rust from a leaky water coolant leak from the thermostat neck, so it needs to be replaced somehow.
This line goes across the front of the engine block and down to the driver side where it connects to the main fuel lines that go across the body. The total length of pipe to replace would be around 12-15 inches. Flexible rubber hoses are out of the question for this short run due to space constraints and due to the heat that comes off being right next to the cylinder heads and block; I like explosions as much as the next pyro, but I'd rather keep them controlled within my engine block and not in my engine bay.
The bends on this piping are extremely tight, and with the line being 3/8", it would be extremely tough to fabricate with my noob hands.
I've done a little searching with Jegs, Summit, and Rock Auto, but I'm not finding an exact match for the fuel line, at least one that's already fabricated. Junkyarding is a possibility, but all that I see out in my area are the V6s because the V8s get picked apart faster than my dog tearing up a new stuffed animal.
Any help is appreciated.
Re: LB9 Fuel Line Question
A tubing bender would be a must for fabricating these lines. I'm not sure if the '90s versions transitioned to the metric/bubble falres for fuel lines, but you would have to match the connections at the end brackets to maintain compatibility.
Thread Starter
Junior Member

Joined: Sep 2018
Posts: 12
Likes: 2
From: Orange County
Car: 1990 Pontiac Firebird Formula
Engine: 305 TPI
Transmission: 5 Speed Manual
Re: LB9 Fuel Line Question
That's looking to be the case that I'll have to fabricate one or find a shop that can fabricate one for me. Ebay also has been elusive. Never had to make a part for a car before as I've been spoiled with bolt-ons.
Joined: Dec 2004
Posts: 16,738
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: LB9 Fuel Line Question
Mastercool has the flare tool for Saginaw fittings. Super simple to use.
Thread Starter
Junior Member

Joined: Sep 2018
Posts: 12
Likes: 2
From: Orange County
Car: 1990 Pontiac Firebird Formula
Engine: 305 TPI
Transmission: 5 Speed Manual
Re: LB9 Fuel Line Question
And I recently discovered a third option, take it to a fuel and hose repair and fabrication shop! Cost me just under $25 to get the old one repaired. Props to Mesa Hose in Costa Mesa for the super quick service.
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