BMW 3 series E46

Since 1998 of release

Repair and car operation


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


Check of system of cooling under pressure

Tightness of system and safety valve work in a radiator cover can be checked up 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 a hot liquid and steams that can lead to a burn. The cover can be opened only at liquid temperature more low +90°С.


1 Check up level of a cooling liquid.
2 Check up, whether dry all joinings 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 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 raising of pressure the liquid follows through a leak place. Condense a leak place.
5 If pressure falls without liquid loss, the leak place can be in the engine, for example, the defective sealing lining of a head of cylinders or a crack in the case can be such place.
6 If pressure keeps, though in the course of car movement loss of a cooling liquid takes place, start the engine and allow to it to work on single turns. The manual pump create pressure nearby 1 bar and check up visually a radiator. Localise негерметичность and condense.
7 Stop the engine. Slowly turn away 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 radiator stopper should open.
11 In the presence of damages of a rubber ring to a stopper replace it. Screw a stopper.