Fuel pump and filters (VW Golf 2)

Replacing the fuel pump

The procedure for replacing the fuel pump is simple and does not require special explanations. The pump is installed on the cylinder head, and to gain access to it, you need to remove the air filter. The pump mounting bolts are equipped with heads with an internal hexagon.

Replacing the air filter

The air filter element is made of paper and cannot be cleaned. The air flow through the filter depends on the temperature and engine load. The appearance of filters may differ in different types of engines, but they all operate on the same principle. An air filter with the cover removed is shown in Figure 155. This figure shows the temperature sensor 1, the thermostat in the air inlet duct 2 and the thermostat 3. The temperature sensor has two fittings, one of which is equipped with an internal thread and is used to connect the air duct coming from the thermostat.



The operation of the thermostat that controls the supply of cold air can be checked by removing the air duct that connects the rear wall of the filter to the vacuum chamber, and then blowing air in and out with your mouth. The damper should open and close, producing a clearly audible sound.



For further inspection, the air duct with the thermostat can be removed. At an ambient temperature of 20°C, the damper should be open no more than 2/3. Otherwise, the thermostat should be replaced.



The filter element should be replaced after 30,000 km of run, thoroughly cleaning the inside of the filter housing. In conditions of very dusty roads, replace the filter element more often. To replace the filter element, it is necessary to release 5 spring clamps and remove the cover. To remove the filter assembly, unscrew the mounting bolts. Cover the carburetor inlet with a rag. There is a gasket between the filter housing and the carburetor, which must not be moved during filter installation.