2. Fuel lines are attached to the underbody with brackets and screws.
Steel tubes
3. Welded steel tubing conforming to Technical Standard GM 124 or equivalent is used for fuel lines.
4. Copper and aluminum pipes must not be installed.
Rubber hoses
5. A section of a metal line can be replaced with a reinforced rubber hose (GM 6163-M standard.) with an inscription «Fluoroelastomer».
6. It is forbidden to use a rubber hose if the length of the fuel line next to the exhaust system exceeds 100 mm, and next to the converter - 250 mm. The gap between the vehicle frame and the fuel line must be at least 6 mm.
Nylon tubes
10. Nylon fuel lines are used on late models. When the slightest damage is found (cuts, scratches, kinks) replace nylon tubes. These pipes cannot be repaired.
11. To replace the fuel line, first disconnect it at the tank, remove the fuel line brackets from the frame, unscrew the union nuts and remove the fuel line. Replace the O-rings on the fittings and install the new fuel line in reverse order (see photo).
12. Late models use quick connect tubing
13. Turn the connection parts in opposite directions, loosening the connection.
14. Press the latches and disconnect the tubes (see photo).
15. If only part of the metal tube is damaged, it can be cut out and replaced with a rubber hose 100 mm longer than the part to be removed. Secure both ends of the hose with clamps.
16. If the length of the removed part of the metal tube exceeds 150 mm, then a metal tube with hose sections put on at the ends should be used for connection. The total length of the hoses must not exceed 250 mm.
17. After repair, start the engine and check for leaks.