Fuel Hose/Pipes Assembly Replacement Vapor Pipes
Removal Procedure
Notice:
• Do not attempt to straighten kinked nylon pipes. Replace any kinked
nylon pipes in order to prevent damage to the vehicle. • Do not attempt to repair sections of nylon pipes. Replace damaged
nylon pipes. • Replace the vapor pipes with original equipment or parts that
meet GM specifications. • Replace the vapor hoses with original equipment or parts meeting
GM specifications. Use only reinforced fuel-resistant hose identified with
the word Fluoroelastomer or GM 6163M on the hose.
- Remove the hardware retaining section of the pipe to be replaced. Note the location of attaching hardware for installation.
- Remove the section of the pipe and hoses.
- Inspect the hoses for cuts, swelling, cracks and distortion. Replace as required.
- Inspect the pipes for holes, kinks, and cracks. Replace the sections as required.
Installation Procedure
Important:
• Follow the same routing as the original pipes and hoses. • Secure the pipes and hoses to prevent chafing.
- Install the section of the pipe and hoses.
- Install the hardware retaining section of the pipe being replaced.
Fuel Hose/Pipes Assembly Replacement Fuel Pipe Repair
Steel fuel lines - These are welded steel tubes, meeting GM specifications 124-M, or its equivalent. The fuel feed line is 3/8 inches diameter and the fuel return line 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 Line Repair
- Cut a piece of fuel hose 4 inches (100 mm) longer than the section of line 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.
- 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, also, on the new section of pipe, if used.
- 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.
- Secure fuel line to the frame.
- Check for leaks.
