BMW 3: Coolant pump
The layout and function of the coolant pump have been revised and adapted to match the cooling concept of the B46TU/B48TU engines.
Coolant pump
- Pressure relief valve closed (pressure < 2.2 bar / 32 psi)
- Pressure relief valve opened (pressure > 2.2 bar / 32 psi)
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 2.2 bar (32 psi) builds up in the coolant circuit, 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 2.2 bar (32 psi), the pressure relief valve closes and the coolant is again routed through the coolant ducts.
READ NEXT:
Exhaust System
Exhaust turbocharger
Exhaust turbocharger
The exhaust turbocharger can be replaced individually and is exclusively made
of steel. The boost
charge pressure is still controlled by an electrical waste
Fuel System
The fuel system is made up of the fuel supply and fuel preparation systems.
The fuel supply includes
the fuel tank with all mounted parts and the fuel lines up to the engine
compartment.
The fuel p
Fuel preparation
The fuel preparation has again been adapted to meet the emission legislation
requirements. The high
pressure pump and the injectors have been revised and designed for an fuel
injection pressure of
3
SEE MORE:
Video DVD
Country codes
Only DVDs with the country code selected during
vehicle ordering can be played. Refer to the
information on the CD as well.
1 USA, Canada.
2 Japan, Europe, Middle East, South Africa.
3 Southeast Asia.
4 Australia, Central and South America, New Zealand.
5
Concept, General information, Safety information
Concept
The system helps to avoid imminent side collisions.
General information
Four radar sensors in the bumpers monitor the
space next to the vehicle from a minimum speed
of up to approx. 130 mph/210 km/h.
The minimum speed is country-specific and is
displayed in the menu for the intelligent Saf
