Katerina Swanson
The fuel line size for a 1971 Jeep CJ5 is a common topic of discussion among Jeep enthusiasts. There are various options available for fuel pumps, including lightweight pumps with mounting brackets and hardware, and mechanical fuel pumps that meet or exceed Original Equipment (OE) specifications for fit, form and function. The size of the fuel line is also a key consideration, with some Jeep owners opting for 3/8 copper lines mated to 5/16 copper lines, while others suggest a 3/8 feed and a 1/4 return for Buick-powered Jeeps.
| Characteristics | Values |
|---|---|
| Supply line size | 5/16 |
| Suction side of the mechanical pump | 5/16 |
| Steel line (supply) | 3/8 |
| Rubber line | 3/8 |
| Feed | 3/8 |
| Return | 1/4 |
Explore related products
What You'll Learn
The supply line coming out of the tank is 5/16
To solve this problem, some people have mated a 3/8 copper line to a 5/16 copper line. The 3/8 line should be cut with a saw, not a tubing cutter, as this will compress the ID to be too small. The 3/8 line should then be cleaned with a rat tale file until the 5/16 line fits inside.
It is worth noting that Buick-powered Jeeps from the 1970s have a 3/8" feed and a 1/4" return.
Emergency Fuel Line Repair: Temporary Plug Solutions
You may want to see also
Explore related products
The steel line (supply) attached to the frame is 3/8
The 1971 Jeep J2500 Gladiator Custom-Cab Platform Stake has a 3/8" feed and a 1/4" return.
If you are having trouble getting the 3/8" rubber line to tighten enough, you can try using a 3/8 copper line mated to a 5/16 copper line. Cut the 3/8 with a saw and clean it with a rat tale file to the point that the 5/16 line fits inside the 3/8.
Fuel Line Clog: Causes, Effects, and Prevention Tips
You may want to see also
Explore related products
The suction side of the mechanical pump is 5/16
The 1971 Jeep CJ5 fuel pump is a lightweight pump that includes a mounting bracket and hardware. It is universal for all carbureted engines. The suction side of the mechanical pump is 5/16. This is the same size as the supply line coming out of the tank. The steel line (supply) attached to the frame running from the tank to the fuel pump is 3/8.
It is standard practice to employ suction-side piping one or two sizes bigger than the pump inlet. This is because small pipes result in larger friction losses, which means it costs more to run your pumping system. However, the diameter of the suction side can be the same size as the pump inlet.
The 1971 Jeep J2500 Gladiator Custom-Cab Platform Stake has a 3/8" feed and a 1/4" return.
Flushing E85 Fuel Lines: Effective and Safe Methods
You may want to see also
Explore related products
The 1971 Jeep CJ5 Fuel Pump
The supply line coming out of the tank is 5/16, as is the suction side of the mechanical pump. However, the steel line (supply) attached to the frame running from the tank to the fuel pump is 3/8. This can cause problems with tightening the 3/8 rubber line to the 5/16 at the tank and the pump.
To solve this problem, some people have taken 3/8 copper line and mated it to 5/16 copper line. The 3/8 copper line should be cut with a saw (not a tubing cutter, which will compress the ID to be too small), and cleaned with a rat tale file to the point that the 5/16 line fits inside the 3/8.
Fuel Pump Mystery: Understanding the Three Lines
You may want to see also
Explore related products
Buick-powered Jeeps have a 3/8 feed and a 1/4 return
Jeep fuel lines are made of steel or rubber. The supply line coming out of the tank is 5/16, as is the suction side of the mechanical pump. However, the steel line (supply) attached to the frame running from the tank to the fuel pump is 3/8.
Ford Focus Fuel Line: A Comprehensive Guide to Parts
You may want to see also
Frequently asked questions
The supply line coming out of the tank is 5/16, as is the suction side of the mechanical pump. However, the steel line (supply) attached to the frame running from the tank to the fuel pump is 3/8.
The steel fuel line is mated to a 5/16 copper line.
The feed is 3/8" and the return is 1/4".
