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


Check of system of cooling under pressure

Tightness of system and work of a safety valve in a cover of a radiator can be checked by means of the special tool, for example, HAZET 4800/9.

At the hot engine before opening of a broad tank put on it a thick rag to exclude emission of hot liquid and паров that can lead to a burn. The cover can be opened only at liquid temperature below +90°С.


1 Check level of cooling liquid.
2 Check, whether dry all accessions of hoses. If necessary wipe them.

3 Establish on a jellied branch pipe on a radiator the tool for check of pressure-1-. Create the manual pump of the tool pressure 1.5 bar and wait for 2 minutes.


4 the Created pressure can fall during 2 mines no more, than to 0.1 bar. If pressure falls further, reveal a leak place in system. At a pressure raising liquid follows through a leak place. Condense a leak place.
5 If pressure falls without liquid loss, the place of leak can be in the engine, for example, defective sealing laying of a head of cylinders or a crack in the case can be such place.
6 If pressure keeps, though in the course of movement of the car loss of cooling liquid takes place, start the engine and let's to it work on single turns. The manual pump create pressure about 1 bar and check visually a radiator. Localize a leakage and condense.
7 Stop the engine. Slowly unscrew a connecting element, having removed pressure in cooling system.

Check of the valve of a stopper

8 Screw a stopper-2-on the tool for check-1-.


9 Create the manual pump of the tool pressure. The stopper should be tight. The safety valve in a stopper should open only at pressure 1.0 bar (Models 320d: 1.4 bar). Otherwise replace a stopper.
10 Create in a stopper vacuum. At vacuum 0.1 bar the vacuum valve in a stopper of a radiator should open.
11 in the presence of damages of a rubber ring to a stopper replace it. Screw a stopper.