Warning: see warning in subsection 1
1. Before affecting fuel lines or their connectors, it is necessary to relieve pressure in the system (see subsection 2)
2. The metal fuel supply line, as well as the fuel vapor circulation lines, run from the fuel tank into the engine compartment. These tubes are attached to the body or frame elements with plastic clips (see illustration). Metal tubes are connected to the tank, fuel filter and receiver with hoses. Fuel lines need to be periodically inspected for leaks or signs of damage.
4.2. The fuel lines are attached to the bottom of the car with plastic clips.
3. If damage to the fuel line is detected, you can replace it with a steel tube of the same diameter, on which connectors of the appropriate type are installed. Fuel hoses are replaced with factory replacement parts only, as other hoses may not be able to withstand the fuel pressure generated by the system. It is prohibited to replace metal fuel lines with rubber hoses with clamps.
4. If a clogging of the system or fuel filter is detected during disassembly, it is necessary to disconnect and bleed the fuel line. Check that there are no signs of damage to the fuel intake of the pump.
5. Do not place fuel lines closer than 10 mm from the exhaust system elements, and 25 mm from the catalyst. Friction of the fuel lines against the engine, body or frame of the vehicle is unacceptable - the gap must be at least 6 mm.
6. When replacing the fuel line, you must remove all the fasteners that secure it to the body.
7. Because fuel lines are under high pressure, proper precautions must be taken when handling them.
Steel tubes
8. Replace steel fuel pipes or fuel vapor lines only with genuine replacement parts or equivalent parts.
9. It is prohibited to replace steel fuel lines with copper or aluminum tubes, since such materials are destroyed by normal vehicle vibration.
10. Some fuel lines have threaded fittings with O-rings. Sometimes fittings are loosened for maintenance or element replacement.
- A) When loosening and disconnecting the coupling, you must use two keys: one (special) for the connecting nut, and the other for fixing the fixed element of the connection.
- b) To disconnect quick-release metal couplings, you must use the special tool GM#J37088-A or its equivalent (Such devices are commercially available).
- With) Inspect all O-rings for tears or cracks. Replace any hardened, worn or damaged rings.
- d) When replacing fuel lines, use only original fittings or their equivalent.
Fuel hoses
11. There are different methods for disconnecting quick couplings of fuel lines depending on their type (see illustrations). Clear the area. adjacent to the coupling. Disconnect the coupling and carefully remove the fuel line from the vehicle.
4.11a. To release the plastic rings of the two-key coupling, squeeze the keys together and pull the fuel lines in opposite directions
4.11b. To disconnect couplings with metal rings, you must use a special device (commercially available)
4.11s. To disconnect couplings with metal rings, you must first remove the lock...
4.11d...place the device on the fuel line and insert the device perpendicularly into the coupling, then stretch the sections in opposite directions (There is no need to use a tool to connect the fuel lines
Caution: Damaged quick release couplings cannot be repaired. Do not attempt to repair a fuel line with a failed connector - in this case, replace the entire element.
12. Installation is carried out in the reverse order of removal, observing the following requirements.
- A) Clean the quick connector using a lint-free cloth and lubricate it with clean engine oil.
- b) After connecting the quick coupling, check its reliability by trying to pull the connected sections in opposite directions.
- With) Install new O-rings for threaded couplings (if their presence is provided for by the design).
- d) Before starting the engine, turn the ignition key from the ON to the OFF position several times and make sure that there is no fuel leakage through the clutch.