Attention! Before removing the hoses, depressurize them. Disconnect air conditioning hoses only at a workshop.
Constantly elevated temperature in the engine compartment leads to intensive wear (aging) rubber and plastic hoses. Hoses should be checked regularly for cracks, loose clamps, material hardening and signs of leaks.
Vacuum hoses
Vacuum hoses are used in emission control systems and are colour-coded. Different systems use hoses of different sections, with different wall thicknesses, heat resistance and different collapse resistance. When replacing hoses, strictly monitor their compliance with the material being removed.
When removing more than one hose, mark fittings and hoses. to ensure the correct assembly of the system when they are installed. Check vacuum hoses by listening with a stethoscope (without membrane) surfaces of hoses and their joints with systems, for the presence of a characteristic hissing sound of air being sucked in.
Fuel hoses
Attention! Start checking the fuel system by depressurizing it. Checking hoses and pipelines associated with fuel leakage require increased fire safety measures. Fuel that comes into contact with the skin should be washed off immediately with plenty of soap and water.
Fuel hoses must be checked in the following order.
- Check fuel hoses for signs of wear and tear. Particular attention is paid to the bending area and in front of the battery fittings.
- Check the condition of the clamps on the fittings of the fuel system elements and hoses.
- When replacing elements of the fuel system, band clamps (if there are) replace with screw type clamps.
Metal pipelines
Metal pipelines, in the form of separate sections, are installed between the fuel pump and the fuel injection system.
Checking of pipelines must be carried out in the following order.
- Carefully check the pipelines for dents, twists and cracks.
- When replacing, use only seamless, steel tubes, copper and aluminum tubes are not strong enough to withstand vibrations caused by engine operation.
- Check the brake system pipes at the points of their connection with the ABS master cylinder and hydraulic unit for cracks or loose fittings.
- Any sign of a brake fluid leak requires an immediate and thorough inspection of the entire brake system.
Power Steering Hoses
Check power steering hoses primarily for signs of fluid leakage, loose fittings and worn clamps. If leaking hoses and worn clamps are found, replace them with new ones immediately.