BMW 5 Series: Coolant pump
The layout and function of the coolant pump have been revised and adapted to match the cooling concept of the Bx8 TU engines.
Coolant pump, Bx8TU engine
- Pressure relief valve closed (pressure < 2.1 bar)
- Pressure relief valve opened (pressure > 2.1 bar)
A pressure relief valve is installed in the mechanical coolant pump housing. In combination with the heat management module, the pressure relief valve on the one hand ensures that the engine operating temperature is reached more quickly, while at the same time reducing leaks and component damage due to high pressure in the cooling system.
If an excess pressure of more than 2.1 bar builds up in the coolant circuits, the pressure relief valve opens and releases a bypass channel. The coolant is now exclusively circulated in the pump body.
Once the pressure drops below 2.1 bar or the engine speed rises above 3000 rpm, the pressure relief valve closes and the coolant is again routed through the engine's coolant ducts.
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Crankcase monitoring
On-board diagnosis
Feed-in point of the blow-by gases to the clean air line upstream from the
exhaust turbocharger
Non-return valve
Connection to exhaust turbocharger
Captive screws
Crankcase
Exhaust turbocharger
B58TU exhaust turbocharger
Exhaust turbocharger in the B58TU engine
Exhaust turbocharger made of steel, for cylinder head-integrated exhaust
manifold ZIAK¹
Exhaust turbocharger made of steel, f
SEE MORE:
Screw connections
Some of the Aluminum-steel connections in the G30 body structure are produced
using a new body
joining technique: flow drill screws. These include, for example, the connection
between the engine
support (Aluminum extruded profile) and the bulkhead carrier support
(ultra-high-strength hot-formed
s
Temperature
Concept
The automatic climate control achieves the set
temperature as quickly as possible, if needed, by
using the maximum cooling or heating capacity,
and then keeps it constant.
Adjusting
Turn the wheel to set the
desired
temperature.
Do not rapidly switch between different
temperature settings
