E46 series BMW 3

since 1998 of release

Repair and car operation



E46 series BMW 3
+ BMW 3 Cars (Е46)
+ Current leaving and service
+ Engine
- Systems of cooling, heating
   - System of cooling of the engine
      Replacement of cooling liquid
      Thermoswitch check
      Check of system of cooling under pressure
      Connection and separation of the quick disconnect coupling
      Removal and thermostat installation
      Removal and installation of a fan / casing of the fan
      Removal and fan installation with the vyazkostny coupling
      Removal and radiator installation
      Removal and installation of the pump of cooling liquid
   + Heater and conditioner of air of salon
+ Power supply systems, injection and release
+ engine Electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes



2d97642e


Removal and thermostat installation

The thermostat opens a big contour of circulation at increase of temperature of cooling liquid. If owing to damage the thermostat does not open, the engine overheats. It is possible to determine it by the index of temperature of the cooling liquid, being in an emergency zone, at that time when the radiator at the same time remains cold. The damaged thermostat can remain also open after decrease in temperature of cooling liquid. A sign of it is that the engine does not reach the working temperature and that value of temperature on the index of cooling liquid grows more slowly, than usually or heating becomes in the winter weak.

 REMOVAL

The thermostat is built strongly in the case and cannot be taken out from there. In the presence of defect it is necessary to replace it together with the case.

1 Merge cooling liquid, address to the Section Replacement of cooling liquid.

Models 320i, 323i, 328i


2 Models with the conditioner: Disconnect the fan with the vyazkostny coupling, address to the Section Removal and fan installation with the vyazkostny coupling.
3 Unscrew bolts of fastening and remove an eye in front on the engine.

Models 320d


4 Remove from the face party of the engine AGR radiator.
5 Disconnect the pipeline of cooling liquid under the thermostat case at a head of cylinders and at the holder.

6 Disconnect hoses of cooling liquid from the thermostat-1-case from the forward party of the block of cylinders. For this purpose pull upward a screw-driver a wire clamp, address to the Section Connection and separation of the quick disconnect coupling.

On an illustration the case of the thermostat of models 320i, 323i, 328i and 320d is shown.

7 Rasstykuytes I will corrode at the thermostat case.
8 Unscrew the case of the thermostat and remove together with sealing laying-2-.

The thermostat cannot be checked usually by a way of immersion to capacity with hot water as the temperature of its opening lies above a boiling point and makes 105°С.



 INSTALLATION

9 Clear sealing surfaces on the case and a cover and wipe a rag moistened in alcohol.
10 Evenly fix the thermostat case with new sealing laying by the moment of 10 N • m.

Do not tighten fastening bolts too strongly.

11 in the presence of deformations replace sealing rings on quick disconnect couplings. Press wire clamps. Put on hoses, thus the coupling it should be fixed distinctly.
12 Join the socket at the thermostat case.
13 Models 320i, 323i, 328i: Fix the moment of 20 N • m an engine eye.
14 Models 320i, 323i, 328i with the conditioner: Establish the fan with the vyazkostny coupling, address to the Section Removal and fan installation with the vyazkostny coupling.
15 Models 320d: Fix the pipeline of cooling liquid under the thermostat case with the sealing laying. Fix the pipeline on the holder. Establish AGR radiator, address to the Section Removal and installation of the inlet pipeline.
16 Fill system with liquid and remove air, address to the Section Replacement of cooling liquid.
17 Start and warm up the engine. Check, whether the radiator got warm and whether the thermostat case is tight. In the presence of leakages tighten fastening bolts.