BMW 5 Series Owners & Service Manuals

BMW 5 Series: Split cooling valve

Split cooling
Heat management module with electric split cooling valve

  1. Electric split cooling valve

To guarantee optimal heat distribution during the cylinder head and crankcase warm-up, the coolant supply for the cylinder head and crankcase is controlled individually. The coolant is controlled by the Digital Motor Electronics (DME). The coolant is distributed by the electric split cooling valve on the heat management module in the warm-up phase such that substantially more coolant is available to the cylinder head than to the crankcase. Depending on the engine's operating condition, the Digital Motor Electronics (DME) decide on the distribution of the coolant quantity to the cylinder head and the crankcase as required.

Split cooling

Switching logic of split cooling valve

Split cooling
Switching logic of electric split cooling valve

  1. End stop
  2. Delivery position
  3. End stop

% - Valve opening in %
x - Rotary valve position in degrees, angle of rotation

  1. Rotary valve

The diagram shows the switching logic of the electric split cooling valve. Depending on the operating condition and coolant temperature of the engine, as well as the driver's desired load, the Digital Motor Electronics (DME) releases the coolant access from the crankcase to a greater or lesser extent via the rotary valve of the split cooling valve. The coolant now also flows through the crankcase and cools components.

A bleeding procedure in line with the repair instructions is required following a part exchange in the cooling system or refilling of the cooling system. Filling without a vacuum filler device (watering can filling) is not approved There is a risk of engine damage in case of failure to comply The filling specification must be observed Operation of the vehicle is not permitted without completing the entire filling and bleeding routine.

There is a risk of functional limitations or overheating.


     Heat management module

    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

     Operating strategy of the heat management module

    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

     Cold-start phase

    Point A in the heat management module circuit diagram designates the cold start with an engine that has completely cooled down. Cold-start phase, Bx8TU engine In the cold-start phase, the coolant c


     Engine Electrical System

    Engine control unit The new 8th generation of Bosch engine control units already used in the G12 is used in the G30. Its appearance is characterized by a uniform housing and a uniform connector strip. However, the hardware inside has been adapted to the various applications. Two engine control u

     Teleservice Report

    Concept Transmits technical data that is evaluated for the ongoing development of BMW products from the vehicle to BMW in regular intervals, if needed. General information The Teleservice Report is free of charge and is activated in vehicles that meet the following requirements: Certain technical

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