1.0. Fuel tank, fuel pump and fuel filter. The illustration shows the fuel tank of a Golf petrol engine with front-wheel drive
1 - fuel tank filler cap. If the seal is damaged, it must be replaced with a new one
2 - bolt. Tightening torque 1.5 Nm
3 - connection on «mass» (-). Check the tightness of the terminal
4 - bolt Tightening torque 10 Nm
5 - guide
6 - fuel tank. When dismantling, the tank should be supported with a garage jack. If the tank is replaced with a new one, air must be removed from the fuel system
7 - bolt Tightening torque 25 Nm. Tightening torque for Touran vehicles with diesel engine is 20 Nm + 90°turn (1/4 turn)
8 - washer
9 - band clamp for fastening the fuel tank. Observe installation position
10 - protective shield
11 - fuel filter. Mounting position: the arrow on the filter housing indicates the direction of fuel flow from the tank to the engine. After installing a new fuel filter, air must be bled from the system
12 - fuel supply line. Connected to the fuel distribution line in the engine compartment. Make sure the fuel line is firmly seated
13 - ventilation pipeline. Mounted on the side of the fuel tank with clamps. Check the strength of the attachment
14 - stuffing box. If damaged, the seal must be replaced. During installation, it is attached to the installation site without wetting. Wetting is only necessary when installing the flange
15 - feed pump and fuel gauge sensor. The pump has a sieve that must be cleaned. Follow the correct mounting position of the pump and sensor according to the arrows on the fuel tank.
16 - union nut. Tightening torques: Golf cars - 110 Nm; Touran cars - 80 Nm
17 - black fuel supply line. Attaches to the side of the tank. Check the strength of the attachment
18 - blue fuel return line. Mounted on the side of the tank Check the strength of the fastening
19 - filler neck with rubber bushing
The fuel tank in Golf cars holds about 55 liters (for Touran cars - about 60 liters).
The tank is located on the bottom of the body in front of the rear axle. The current fuel supply is indicated to the driver by an indicator device on the instrument panel. The fuel tank is ventilated by an exhaust ventilation system. Gasoline vapors that are harmful to the environment and are vented from the tank are captured by the adsorber and from there are sent to the engine for subsequent combustion.
Fuel economy
Driving style largely determines fuel consumption. A few tips for proper handling of the accelerator pedal:
- A) move off immediately after starting the engine, even in frosty weather;
- b) turn off the engine during stops and parking, the duration of which will be more than 40 seconds;
- V) drive in the highest possible gear;
- G) maintain a steady speed when driving long distances. Avoid high speeds. Evaluate the traffic situation to avoid unnecessary and unnecessary braking;
- d) do not carry unnecessary cargo. If the roof rack is not in use, remove it;
- e) Maintain prescribed tire pressure. Do not operate the vehicle with low tire pressure.
Rules for cleanliness and safety when working with the fuel system
When working on the fuel supply system, the following cleanliness and safety precautions must be carefully observed:
- Connecting joints and places near them should be thoroughly cleaned before disconnection.
- Removed parts should be placed on a clean cloth and covered with foil or paper. Fluffy rags are not allowed!
The fuel system is under pressure. Before disconnecting the fuel system hoses, wrap the junction of the hoses with a rag and only then carefully remove the hose, relieving pressure.
Attention! For vehicles with direct injection engines, the pressure can only be relieved in that part of the system where a relatively low pressure is created (up to 4-6 bar). To relieve pressure in the part where high pressure is injected (up to 120 bar), requires special equipment, available only in workshops. The high pressure fuel system includes the high pressure pump, high pressure lines and fuel injectors. In diesel engines, the temperature of the fuel and fuel lines can in some cases reach +100°C. Allow fuel to cool before disconnecting fuel lines.
No open flames or sparks near the workplace! No smoking! The workplace must be equipped with a fire extinguisher! Make sure the workplace is well ventilated. Fuel fumes are poisonous.
Wear protective goggles and use gloves when performing work.
Parts and assemblies, access to which was opened or they were dismantled, carefully cover or close if further work is not carried out immediately.
Remove spare parts from the packaging just before installing them. Install only clean parts.
With an open fuel system, if possible, do not work with compressed air. If possible, do not move the vehicle.
Do not use silicone-based sealant. Silicone particles are sucked up by the engine, but do not burn out and can damage lambda probes.
Fasten fuel hoses on branch pipes of the engine only clamping collars. Clamps or clamps with clamping screws are not permitted.
Follow that. so that diesel fuel does not get on the hoses of the cooling system. Remove any fuel that gets on the hoses immediately. Replace damaged hoses immediately.
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