E46 series BMW 3

since 1998 of release

Repair and car operation


E46 series BMW 3
+ BMW 3 Cars (E46)
+ 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

2b332cca

Replacement of cooling liquid

It will be necessary for work for you:

- A viewing hole or the hydraulic garage lift with supports.
- Cap key or head.
- Capacity for cooling liquid.
- Antifreeze. The brands of antifreeze resolved by BMW firm are thus allowed to application only. Address to Specifications. Attention: Mixing of antifreeze of various brands is not allowed.
- Pure, with the low content of lime water of drinking quality.
- For a drain stopper on the block of cylinders the sealing ring And 14 x 18 is necessary aluminum.

Within maintenance it is necessary to make replacement of cooling liquid each 4 years. Attention: Cooling liquid in a certain degree is poisonous, and it cannot be poured out simply. Local authorities should provide information on an arrangement of points of reception of similar materials.
The volume of system of cooling is specified in Specifications.

Removal of cooling liquid

Do not open a stopper at the hot engine. There is a danger of a burn! A stopper open only at temperature of cooling liquid below +90°С. When opening a stopper put on it a rag.


1 Carefully open a stopper of a broad tank.

Operation of lifting and car installation on supports is connected with danger! Therefore before carrying out operation familiarize with Poddomkrachivaniye's Section and towage


2 Lift and establish the car on supports. Remove the bottom cover of an impellent compartment, address to the Section Removal and installation of the bottom cover of an impellent compartment.

3 Substitute under a radiator pure capacity and unscrew a stopper below under a radiator, holding thus an adjusting nut-2-. Engines 316i, 318i have also separate drain stopper-3-for a broad tank which is necessary for opening also.

4 In addition put capacity under the engine and turn out a drain stopper on the block of cylinders. The stopper is under a final collector.


5 Completely merge cooling liquid and utilize it according to an existing order.
6 Screw a drain stopper with a new sealing ring in the block of cylinders and tighten the moment of 25 N • m.
7 Screw a drain stopper on a radiator with new sealing slightly tighten it the moment of 2.5 N • m.

Filling of system with cooling liquid

8 Establish a heater in salon on the maximum capacity. The switch of the fan establish on a low step and include ignition. Thus, heater cranes open.

9 Open the union for production of air at the top of a radiator near a broad tank.


10 Petrol engines: Fill a broad tank to edges with fresh cooling liquid so that liquid left without vials via the union for air removal. Close the union.

Unions tighten slightly the moment of 2.5 NChM.


Diesel engine 320d

11 Weaken screws-1-and remove engine-2-facing. On an illustration on both left screws there are face keys for an internal shestigrannik.

12 Weaken the union for air-1-removal on a radiator of system of a retsirkulyatsiya of the fulfilled gases and the union-2-the heat exchanger oil-water.

13 Weaken the union of removal of air-1-on a heater hose.

14 Engine 320d with the conditioner: Weaken the union for air-1-removal on a hose going to the heat exchanger of a heater.


15 At the diesel engine it is necessary to observe surely the following sequence of filling of system cooling liquid:

a) Slowly fill a broad tank with liquid. Close the heat exchanger union-2-oil-water when through it liquid will act.

b) Fill in liquid further. Close the union-1-near a broad tank when liquid will act there.


c) Fill a broad tank with liquid to edges.
d) Close the remained unions on a heater hose, a radiator of system of a retsirkulyatsiya and, in the presence of the conditioner, on a hose of the heat exchanger of a heater.

Via the specified unions when filling system liquid does not leave.


All engines:

16 Close a broad tank a stopper. It is not necessary to warm up the engine at an open stopper as it can lead to damages.
17 Start the engine and hold turns above 2500 rpm in tolchkoobrazny pressing a gas pedal. As a result of removal of air containing in cooling liquid level liquid in a tank slightly will go down.
18 Switch off ignition.

Cooling liquid in system if necessary add only after engine cooling, otherwise after removal of a stopper there is a danger of a burn!


19 Check liquid level on the cold engine and if necessary add, address to the Section Check of levels of liquids.
20 Visually check tightness of system of cooling, in particular, shlangovy accessions, and also drain jams and unions of removal of air.

21 Diesel engine 320d: Establish and fix engine facing.