Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
- Fuel tank and fuel pump
   For what ventilation of a fuel tank is necessary?
   The fuel level indicator sensor in a fuel tank
   Fuel-supply lines
   The fuel pump with the electric drive
   Dismantle of the petrol pump with the electric drive
   Replacement of the fuel filter
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Fuel-supply lines

In our engines with fuel injection hoses and fuel pipes have to maintain pressure more than in 5 bars. Therefore hoses are made of the material steady against pressure, and in junctions are in most cases screwed together or supplied with tightening collars.

Dismantle of fuel-supply lines and fuel hoses


  1. Purity – the basic law during the works on fuel system. You have to clear previously at least of dirt that area where work will be performed in order that dirt did not get to open fuel-supply lines.
  2. Weakening of tightening collars: nippers flatten out a metal loop on its perimeter. At the expense of it tightening the collar extends, and the fuel hose can be removed rotary motions.
  3. If it is impossible, establish a rozhkovy key on edge of a hose and wring out them a hose.
  4. At installation you have to use the screw instead of tightening collars.

     Important: the fuel system still long time after switching off of the engine can be under pressure.

  5. When unscrewing a fuel pipe keep in readiness a rag in order that to you gasoline did not scatter in eyes.