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
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Functional prerequisites
To use the Parking Maneuvering Assistant function, the following basic
prerequisites must be met:
The doors must be closed
The trunk lid must be closed
The driver's seat belt must be fastened
The parking brake must be released
Measuring parking spaces
Parking spaces are measured while driving
Unlocking
General information
The behavior of the vehicle when unlocking with
the vehicle key depends on the following settings for unlocking and locking:
If only the driver's door and the fuel filler flap
or all access to the vehicle will be unlocked.
If the unlocking of the vehicle is confirmed
with a
