BMW 5 Series: Split cooling
A new development for the B58TU engine is the split cooling. A cooling
concept which is used the
N63 TU2.
The split cooling function uses the electric split cooling valve, eSCV, to
enable on-demand decoupling
of the crankcase from the coolant flow both in the warm-up phase and in partial
load operation. In this
situation, the coolant is exclusively routed through the cylinder head. The
engine reaches its operating
temperature more quickly in the warm-up phase, and can be operated with reduced
emissions in
partial load operation.

Cooling circuit, B58TU engine
- High cooling requirement, split cooling cylinder head
- Low cooling requirement, split cooling crankcase
- Cylinder head
- Crankcase
- Heat management module
- Electric Split Cooling Valve (eSCV)
- Coolant pump

Cooling system for B58TU engine
- Coolant radiator
- Coolant temperature sensor, radiator outlet
- Electric fan
- Electric split cooling valve
- Coolant pump
- Pressure relief valve
- Coolant temperature sensor, crankcase
- Crankcase
- Cylinder head
- Exhaust turbocharger
- Heating
- Component temperature sensor
- Expansion tank
- Engine oil/coolant heat exchanger
- Transmission oil/coolant heat exchanger
- Heat management module
In split cooling, the cooling requirements for the crankcase and the cylinder
head are managed by the
electric split cooling valve. The fact that the engine reaches operating
temperature more quickly again
translates to substantial consumption and emission reductions.
READ NEXT:
Heat management module with electric split cooling valve
Electric split cooling valve
To guarantee optimal heat distribution during the cylinder head and crankcase
warm-up, the coolant
supply fo
The function of the heat management module is similar to that of the heat
management module of the
B58 engine.
B58TU engine heat management module
Coolant output towards the coolant pump
Electri
The following graphic shows the positions of the rotary valve as the coolant
temperature increases.
Circuit diagram of heat management module in B58TU engine
0 % - Rotary valve closed
100% - R
SEE MORE:
B46/B58 Engine
System wiring diagram B68/B58 engine in G30
Digital Motor Electronics (DME)
Electric fan
Relay for electric fan
Power distribution box, engine compartment
Pinion starter
Air conditioning compressor
CAN terminator 6
CAN terminator 5
CAN terminator 4
Body Domain Controller (
General information
Do not use the wipers if the windshield is dry, as
this may damage the wiper blades or cause them
to become worn more quickly.
Safety information
Warning
If the wipers start moving in the folded away
state, body parts can be jammed or damage
may occur to parts of the vehicle. The