BMW 3: Cooling System
BMW 3 Series G20 (2018-2025) Training manual / B46TU-B48TU Engines / Cooling System
- Split cooling
- Heat management module
- Operating strategy
- Operating temperature
- Coolant pump
- Exhaust System
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Split cooling
Split cooling is a new development for the B46TU engine. This cooling concept
is a modified version
of which is already used in the N63TU2.
The Split Cooling function uses the electrical Split Cooli
Heat management module
The heat management module replaces the characteristic map thermostat.
Heat management module
Electrical Split Cooling Valve (SCV)
Coolant output towards the coolant pump
Electrical actuator
Rot
Operating strategy
The following graphic shows the positions of the rotary valve as the coolant
temperature increases:
Switching diagram heat management module
0% - Rotary valve closed
100% - Rotary valve open
Cold
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Engine identification
B46TU engine
Engine identification - transverse mounted shown
B48TU engine
Engine identification - transverse mounted shown
Engine number
Engine identification
The 7-digit engine identification is located on the crankcase in the area of
the mounting for the
crankshaft alignment pin. The first
Control elements
Buttons and functions
Press: switches sound
output on/off.
Turn: adjusts the volume.
Change the entertainment
source.
Press once: changes
the station/track.
Press and hold: fast forward/
rewind the track.
Programmable memory
buttons.
Changing the waveband/
satellite radio.
Depending on the
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