Fuel Pipe Repair

Steel fuel pipes - These are welded steel tubes, meeting GM specifications 124-M, or its equivalent. The fuel feed pipe is 3/8 inches diameter and the fuel return pipe is 5/16 inches diameter. Do not use copper or aluminum tubing to replace steel tubing. Those materials do not have satisfactory durability to withstand normal vehicle vibration.

Coupled hose - Do not repair the hoses. Replace them only as an assembly.

Uncoupled hose - Use only reinforced fuel resistant hose, made of Fluoroelastomer material. Do not use a hose within 4 inches (100 mm) of any part of the exhaust system, or within 10 inches (2154 mm) of the catalytic converter. The hoses inside diameter must match the outside diameter of the steel tubing.

Clamps - These are stainless steel, screw bank-type clamps, #2494772, or equivalent

Steel Fuel Pipe Repair
1. Cut a piece of fuel hose 4 inches (100 mm) longer than the section of pipe to be removed. If you remove more than 6 inches (152 mm), use a combination of steel pipe and hose. The hose length should not be more than 10 inches total.
2. With a tube cutter, cut a section of the pipe to replace. Use the first step on the reamer to form a bead on the ends of the pipe and on the new section of pipe, if used.
3. Slide the hose clamps onto the pipe and push the hose 2 inches (51 mm) onto each portion of the fuel pipe. Tighten a clamp on each side of the repair.
4. Secure fuel pipe to the frame.
5. Inspect for leaks.
5.1. Turn ON the ignition for 2 seconds.
5.2. Turn OFF the ignition for 10 seconds.
5.3. Turn ON the ignition.
5.4. Inspect for fuel leaks.