BMW 3 Series E21 V6 engine power supply system

Power supply system characteristics
Fuel tank The fuel tank is stamped from sheet steel. It has two sections and is mounted under the rear seat in front of the rear axle. Fuel tank capacity, l:...

Main parts of the air filter
Main parts of the air filter: 1 - air filter assembly; 2 - cover fastening nut; 4 — lid; 5 — filter element; 6 - spring holder; 7 - sealing ring; 9 — heated...

Removal and installation the air filter
Removal Press down the spring clips and unscrew the cover mounting nut. Remove the cover, take out the filter element and remove the air filter housing....

Adjusting engine idle speed
Idle speed adjustment must be performed on a warm engine (oil temperature 60°C) with adjusted valve timing clearances and with the ignition timing set...

Main parts of the Solex 4AI carburetor
Main parts of the Solex 4AI carburetor: 13 — mixture quality (composition) adjustment screws; 26 - electromagnetic shut-off valves; 28 — accelerator pump drive...

Cleaning the carburetor
Remove the air filter. Remove spring clip 1 (see photo below) and disconnect the connecting rod. Unscrew the four nuts and eight cap screws. Disconnect the...

Removal and installation the carburetor
Removal Remove the air filter and drain some of the coolant. Disconnect the fuel hoses and engine cooling system hoses from the carburetor. Disconnect the pads...

Replacing the needle valve and setting the fuel level in the float chamber
Remove the carburetor cover. Remove the bracket and take out the float and needle valve. Install the float and new needle valve and secure them with the...

Checking and adjusting the automatic starting device
Adjusting the starting gap of the 1st stage of the air damper This adjustment must be made at a coolant temperature of less than 20°C. At higher temperatures,...

Adjusting the pneumatic drive of the throttle valve of the 1st chamber
Check the clearance "A" between the idle mixture quantity adjusting screw 1 and the throttle control lever, which should be within 3.0±0.2 mm. If necessary,...

Checking the additional starting device
Check the gap "A" between the edges of the plunger and the opening of the actuator of the additional starting device at a coolant temperature of 20°C, which...

Checking and adjusting the accelerator pump
Take it off air filter . Press the throttle control lever several times; at the same time, a stream of fuel should emerge from the two nozzles of the...

Checking electromagnetic shut-off valves
When the ignition is on, the green wires with the yellow stripe of the electromagnetic shut-off valve connectors should be energized (the brown wire is the...

Removal and installation the bimetallic spring housing of the automatic starting device
Removal Drain some of the coolant and remove the liquid chamber housing cover. Remove the bimetallic spring housing, having first disconnected the electrical...

Removal and installation the fuel pump
Removal Disconnect the drain and fuel supply pipes from the pump. Unscrew the two pump mounting nuts. Remove the pump, heat-insulating spacer, insulating...

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