Katerina Swanson
The third-generation Camaro, produced from 1982-1992, has a fuel line size of 3/8 feed and 5/16 return. This is close to the metric size of 12mm. There are fuel line kits available for the third-generation Camaro, which include components such as fuel and brake lines, radiator hoses, and torque arm packages.
| Characteristics | Values |
|---|---|
| Fuel line size | 3/8" feed and 5/16" return |
| Fitting size | 12mm metric saginaw powersteering fitting |
| Fuel line kit | Camaro/Firebird 82-92 LS1 LSX Swap Fuel Line Kit, Black Midnight Series |
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What You'll Learn
The third fuel line is the vacuum line
The third fuel line in a 3rd Gen Camaro is the vacuum line. This line serves a specific purpose in the vehicle's fuel system.
The vacuum line is responsible for removing fuel vapour from the charcoal canister when the EEC purge solenoid opens. It remains bundled with the two primary fuel lines until it reaches the midpoint along the driver's side of the intake manifold. At this point, the vacuum line diverges from the fuel lines, dropping into the valley between the intake manifold and the head.
The vacuum line then connects to a U-shaped metal tube, which points forward. From here, metal and rubber lines run in front of the intake manifold, passing under the throttle body. These lines continue to the EEC purge solenoid, located on the passenger side of the intake manifold. A rubber hose extends from the solenoid, connecting to the lower vacuum port on the passenger side of the throttle body.
This intricate path of the vacuum line allows it to draw fuel vapour from the charcoal canister and direct it into the throttle body. The vacuum line plays a crucial role in managing fuel vapour within the vehicle's system.
It is important to note that some Camaro owners have reported issues with the positioning of the vacuum line. In one instance, the previous owner had moved the line to a position where it lay against the exhaust manifold, causing concern.
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$79.99 $89.99
The vacuum line removes fuel vapour
The "third line" in a 3rd Gen Camaro is the vacuum line that removes fuel vapour from the charcoal canister. This happens when the EEC purge solenoid opens. The line stays bundled with the two fuel lines until midway along the driver's side of the intake manifold. It then drops down into the valley between the intake manifold and the head, where it connects to a U-shaped metal tube.
The vacuum line is important for removing fuel vapour from the engine, which can be harmful if inhaled. It also helps to prevent fuel vapour from escaping into the atmosphere, reducing air pollution.
The vacuum line is typically made of a flexible material, such as rubber or PVC, to allow it to bend and move with the engine. It is often smaller in diameter than the fuel lines, typically ranging from 3/16 to 1/2 inches in size.
There are tools available, such as the OTC 4522 Stinger Vacuum Hose and Fuel Line Removal Tool, designed to remove and replace vacuum hoses and fuel lines. This tool is intended to make the job easier and more comfortable, reducing the risk of injury. It is important to have the proper tools and knowledge when working on fuel and vacuum lines to ensure safety and avoid damage to the vehicle.
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Fuel line size: 3/8 feed and 5/16 return
The fuel line size for a 3rd Gen Camaro is 3/8 feed and 5/16 return. This is likely a metric size, but 3/8" feed and 5/16" return are close enough. Adapters can be used to screw into the fuel fittings on the throttle body and go straight to -6AN fittings. This is often done for TBI conversions and external regulator installations.
Some Camaro owners have mentioned running a Walbro 255 to a return-style regulator for a carb and planning another motor build with nos. They are trying to calculate if the current setup will support their needs or if they need to upgrade the pump and fuel lines.
It is important to note that there are two main fuel lines in a Camaro: the feed line and the return line. In addition to these two main lines, there may be a third line that serves a specific purpose, such as a vacuum line that pulls fuel vapour out of the charcoal canister.
When working on the fuel system of a 3rd Gen Camaro, it is crucial to have a clear understanding of the fuel line sizes and their routing to ensure proper function and safety.
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Fuel line kits are available
Another option for fuel line kits is the Hawks Motorsports LS1 LSX Swap Fuel Line Kit, which is also designed for the 1982-1992 Camaro and Firebird. This kit includes a fuel line heat shield that helps protect the fuel lines from the heat generated by the engine. It also comes with radiator hoses, both upper and lower, which are necessary for a successful LSX swap.
It is important to note that the fuel line size for the 3rd Gen Camaro is typically 3/8" for the feed and 5/16" for the return, and these kits are designed to work with these sizes. The kits are also compatible with the factory 84-92 K-Member, making them a direct fit for the specified model years.
These fuel line kits can simplify the process of converting to an LSX drivetrain and provide the necessary components to ensure proper fuel line installation and protection.
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The fuel line connects to the throttle body
Another option is to use a Holley 4bbl TBI setup, which has the regulator built into the throttle body. The supply and return lines for this setup are 3/8 " pipe thread, facing straight back, 2" on each side of the engine centerline. You will also need "tee" fittings with 1/8" pipe fittings for pressure gauge taps.
If you are using a TBI conversion, you can get adapters to screw into the fuel fittings on the throttle body and go straight to -6AN fittings. This setup uses a 12mm metric Saginaw power steering fitting.
Additionally, there is a ""third line" that is the vacuum line that pulls fuel vapour out of the charcoal canister when the EEC purge solenoid opens. This line stays bundled with the two fuel lines until midway along the driver's side of the intake manifold. It then connects to a U-shaped metal tube that routes in front of the intake manifold, under the throttle body, and goes to the EEC purge solenoid on the passenger side. A rubber hose then connects to the lower vacuum port on the passenger side of the throttle body, pulling fuel vapour into the throttle body.
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Frequently asked questions
The fuel feed line size is 3/8".
The return line size is 5/16".
Yes, there are fuel line kits available for 3rd Gen Camaros.
