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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Head-up Display
Concept
This system projects important information into
the driver's field of vision, for instance the speed.
The driver can get information without averting
his or her eyes from the road.
General information
Follow the information on cleaning the Head-up Display.
Overview
Switching on/off
Via iDri
With parking assistant and
Steptronic transmission:
emergency braking function,
Active PDC
Concept
The emergency braking function of PDC initiates
an emergency braking in case of acute risk of
collision.
General information
Due to system limits, a collision cannot be prevented
under all circumstances.
The function is available below walking speed
when driving in reverse or rolling backwar
