Note. Presence of air in fuel. system of an autonomous heater can lead to disturbances in the combustion process. So that when you turn on the autonomous heater for the first time after performing work on the fuel. tank or fuel supply module, air from the metering pump -V54- was not sucked in and supplied to the auxiliary heater, fill the fuel take-off pipe with fuel after performing work on these components (remove air). The following figure shows the location of components and parts for the Audi A5 Coupe; for the Audi Q5 there are minor differences in the location of components/parts from this figure. Fuel lines must be installed flush with the bottom of the vehicle and protected from mechanical damage. The fuel line to the auxiliary heater must be protected from excessive heat. The fuel line must not touch heating or moving components of the vehicle. In fuel there should be no air in the line going to the autonomous heater. The fuel tank is equipped with different fuel supply modules for vehicles with and without auxiliary heater. So that at the junctions of fuel elements. the lines do not collect steam bubbles, it is necessary to connect them joint to joint.
1. Metering pump -V54-. Depending on the version of the vehicle in fuel. line leading to the auxiliary heater, a silencer can be installed in the area of the metering pump -V54- to reduce noise.; 2. Fuel supply module with a pipe for extracting fuel for an autonomous heater. Various fuel supply modules, depending on vehicle type (petrol or diesel engine). Pour fuel into the fuel tank. dosing pump line -V54- (remove air); 3. Fuel line. So that at the junctions of fuel elements. the lines do not collect steam bubbles, it is necessary to connect them joint to joint. Pour fuel into the fuel tank. dosing pump line -V54- (remove air); 4. Autonomous heater. Different versions depending on the production time, vehicle model and engine type: gasoline or diesel (on the Audi Q5, for example, it is not possible to install auxiliary heaters with the number 8K0.xxx.xxx)
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