This car is a 3 Series convertible, which is also known as the coupé cabriolet on the BMW website. This is the first model in the BMW lineup with 3-piece aluminum folding hard-top roof. Engine cooling system on 2011 E93 335is Convertible consists of a series of radiator and oil cooler isolated circuit. Engine cooling system serves to carry the heat from the engine and maintain the operating temperature is defined as constant as possible. In addition, this machine is also equipped with Electric Water Pump (EWP) which allows the engine and turbo to be cooled even when the machine is turned off.

The following schematic illustrates the 2011 E93 Convertible 335is Electric Water Pump Diagram:

2011 E93 Convertible 335is Electric Water Pump Diagram

  1. Radiator
  2. Gear-box oil cooler
  3. Outlet temperature sensor
  4. Engine oil cooler
  5. Thermostat for gearbox oil cooler
  6. Map thermostat
  7. Electric coolant pump
  8. Exhaust turbocharger
  9. Heat exchanger
  10. Outlet temperature sensor, cylinder head
  11. Thermostat, engine oil cooler
  12. Coolant expansion tank
  13. Vent line
  14. Gearbox oil cooler
  15. Fan


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