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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B58TU exhaust turbocharger
Exhaust turbocharger in the B58TU engine
Exhaust turbocharger made of steel, for cylinder head-integrated exhaust
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Fuse in the Body Domain Controller
CAN terminator
Fuses in the rear power distribution box
Trunk lift drive, right
Trunk function module (H
With an emergency wheel:
enlarging the cargo area
Concept
The emergency wheel and any related components
can be temporarily removed to enlarge the
cargo area.
Removing the emergency wheel
and the storage compartments
1. Remove the cargo floor panel. To do this, pull
the cargo floor panel upward directly behind
the rear backrests.
2. Open the ratch
