BMW 3: Exhaust System
BMW 3 Series G20 (2018-2025) Training manual / B46TU-B48TU Engines / Cooling System / Exhaust System
Exhaust turbocharger
Exhaust turbocharger
The exhaust turbocharger can be replaced individually and is exclusively made of steel. The boost charge pressure is still controlled by an electrical wastegate valve.
The Turbo on the B46TU and B48TU are different in design.
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Fuel System
The fuel system is made up of the fuel supply and fuel preparation systems.
The fuel supply includes
the fuel tank with all mounted parts and the fuel lines up to the engine
compartment.
The fuel p
Fuel preparation
The fuel preparation has again been adapted to meet the emission legislation
requirements. The high
pressure pump and the injectors have been revised and designed for an fuel
injection pressure of
3
Fuel high-pressure pump
The single-piston high pressure pump by Bosch, well-known from the B46
engine, is used. The high
pressure pump HDP6 is driven by a triple cam which is attached to the exhaust
camshaft. To be able
to
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Load point increase
Raising the load of the combustion engine at consistent engine speed is
called load point increase.
This results in an increase in performance and the option to operate the
combustion engine in
the optimal range. The arising resistance, which counteracts the combustion
engine, must be
compensate
High beams, headlight flasher,
turn signal
High beams, headlight flasher
Push the lever forward or pull it backward.
High beams on, arrow 1.
The high beams light up when the low beams
are switched on.
High beams off/headlight flasher, arrow 2.
Turn signal
On: press the lever past the resistance point.
Off: press the lever past the
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