General information
1. The power supply system of any internal combustion engine consists of a fuel supply system and an air supply system.
2. The main elements of the fuel supply system are a fuel tank installed at the rear under the car, an electric fuel pump placed in it (low pressure) and fuel filter. All elements of the system are interconnected by fuel lines.
3. The air supply system includes an air cleaner (with replaceable filter element), air duct system, resonator, turbocharger and charge air cooler (intercooler).
4. Gasoline models have a fuel vapor recovery system (EVAP), the main elements of which are an adsorber and a solenoid valve. Harmful gasoline vapors from the ventilation system of the fuel tank enter the adsorber and accumulate there. When the engine is running, fuel vapors from the adsorber are fed into the engine cylinders, where they are burned. The fuel vapor adsorber is mounted on the right fender of the vehicle.
5. The engine power system is closely connected and functions as a whole with engine control systems and the ignition system (gasoline engines).
6. The process of formation of the working mixture and its supply to the engine cylinders on modern cars is controlled by electronics, therefore, almost all the main ones.
elements of the engine power system are equipped with control sensors. There is no cable for the drive from the gas supply pedal; its functions are performed by a special pedal position sensor.
7. All data received from information sensors are processed in the electronic module of the engine control system, which, based on their analysis, controls the moments and amount of fuel supply to the cylinders, ensuring optimal performance of the power unit, regardless of changes in external factors.
8. In the event of a malfunction in any element of the engine management system, the failure warning lamp is activated on the instrument panel (MIL). When the warning lamp comes on, the car should be driven to an Opel authorized service station as soon as possible for detailed diagnostics using special equipment and the necessary remedial repairs.
Information about the remaining fuel reserve in the tank is received by the driver using the meter and warning lamp built into the instrument cluster. In addition, data on the consumption mode are displayed on the infotainment system, see Chapter «Controls and methods of operation», there are tips for reduce fuel consumption).
Safety precautions and cleanliness when working with the fuel system
Gasoline is a highly flammable liquid. Do not approach the work area with an open flame or a lit cigarette. Do not service the system in rooms equipped with natural gas-fired heaters equipped with a pilot flame (such as water heaters and clothes dryers). Keep a class B fire extinguisher handy at all times!
Fuel fumes are poisonous - make sure that the workplace is well ventilated. Fuel (especially petrol) refers to the number of carcinogenic substances, i.e. - substances that contribute to the development of cancer! Try to prevent fuel from getting into open areas of the body, use rubber protective gloves and goggles, in case of accidental unexpected contact with fuel, wash your hands thoroughly with warm water and soap. Clean up spilled fuel immediately and do not store fuel-soaked rags near open flames. The fuel system is pressurized even when the engine is stopped (petrol models). When opening the system, it is necessary to first relieve the pressure using a special device (see below).
Take special precautions when working on diesel engine power system components. In particular, this statement applies to injector maintenance procedures. Remember that the fuel pressure at the outlet of the injectors is about 1100 atm - do not put your hands and other body parts under the jet.
To fasten hose connections, band and clamp type clamps are used. After disconnecting the hoses, the clamping clamps should be replaced with band or worm clamps. Fixing the locks of some clamps requires the use of special tools - consult with Opel specialists
15. Before disconnecting the male connectors, thoroughly wipe them from the outside to prevent dirt from getting inside the duct.
16. Lay the removed components on a clean lining and wrap in polyethylene or paper - avoid using fluffy rags for wiping and wrapping the components.
17. If repairs take time, make sure that appropriate plugs are installed on all open holes in the components and components of the power system.
18. Replace only clean parts. Remove spare parts from the packaging only immediately before installation. Do not use parts that have been stored unpackaged (e.g. toolbox).
19. Do not use sealants containing silicone. Silicone particles that get into the engine do not burn out and can cause damage to the lambda probe.
20. Before removing the fuel tank, it is necessary to drain the fuel or pump it out with a pump specially designed for this purpose. But an empty tank is also explosive! Before disposing of the tank or before carrying out repair work to restore the tank (soldering, welding, cutting, etc.) it is necessary to neutralize the effect of gasoline vapors, for which the exhaust gases of another car are usually passed through the tank for a sufficiently long time. It would be best and most correct to entrust the restoration repair or disposal of the tank to service station specialists.
21. Do not use compressed air to perform any maintenance or repair work on an open fuel system. If possible, do not move the vehicle.
Tightening torques for some elements
Ignition module mounting screws (petrol models) — 8
Spark plug (petrol models) — 25
Air cleaner cover bolts - 3.5
Fuel filter pinch bolt (diesel models) — 6
Clamping ring of a cover of the fuel filter (Z19DT engines (H)) — 30
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