Caution: The replacement of the hoses of the induction system must be carried out at a specialized service station. where there is equipment for safely emptying and filling the system with refrigerant
General information
1. High temperatures in the engine compartment cause rapid aging of the rubber and plastics that make up the hoses of the engine systems. Therefore, periodically the hoses should be inspected for cracks, hardening, tightness of the clamps and the presence of leaks.
2. Information regarding the features of the cooling system hoses is given in paragraph 14.
3. Some, but not all, hoses are secured with clamps. Check if the clamps are loose, which could lead to leaks in the connections. If the hose is put on a spigot without a clamp, look to see if the hose is not swollen at the connection point or if it is hardened, which can also cause a leak.
Vacuum hoses
4. Vacuum hoses, especially those designed to work in the exhaust system, are usually color coded. Different systems require hoses with different wall thicknesses, dimensional stability and temperature resistance. When replacing hoses, make sure that the new hoses are made from the same material.
5. Often the hose needs to be removed from the vehicle to test it. If several hoses are being removed at the same time, label each one. so as not to confuse them during installation.
6. When checking the hoses, check the plastic T-pieces of the vacuum lines at the same time. Look for cracks in the junctions, the hoses are tightly fitting their tips and if the connections may be leaking.
7 To detect vacuum leaks, you can use a small piece of vacuum hose with an internal diameter of 6-8 mm as a stethoscope. Hold one end of the hose near your ear and the other end "listen" vacuum connections. A vacuum leak will make itself felt characteristic "sucking" sound.
Attention! When performing this diagnostic procedure, be careful not to get caught in the rotating engine parts.
Fuel hoses
Attention! Gasoline is highly flammable, so take extra care when working on the fuel system. Do not smoke, use naked flames or unprotected portable lamps in the work area. The garage should not have gas appliances with an on-duty wick, such as water heaters or dryers. Gasoline is a carcinogen, so wear protective gloves and if gasoline gets on your skin, wash it off with soap and water. Wash up spilled fuel immediately. do not store rags soaked in fuel in the garage. The fuel system is always pressurized, so before disconnecting any fuel line, first depressurize the system (see chapter 4). Keep a carbon dioxide fire extinguisher handy and familiarize yourself with its use.
3. Inspect all rubber fuel hoses for cracks, flaking, or fraying. Especially carefully inspect the places of bending of the hoses and their connection to the elements of the system.
9. When replacing, use only hoses specifically designed for fuel systems.
Metal pipelines
10. Metal piping is often used from the fuel pump to injection system components. Inspect the pipelines along their entire length and make sure that they do not have sharp bends, creases or cracks.
11. If it is necessary to replace a pipe section, use only seamless steel (seamless) tubes, since aluminum and copper tubes are not strong enough to withstand engine vibrations.
12. Check the condition of the brake metal pipes and the reliability of their fittings at the points of attachment to the main brake cylinder. Any signs of brake fluid leakage should signal the day for an immediate brake system check.