E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
- Systems of cooling, heating
   - Cooling system
      Check of system of cooling
      Removal, installation and thermostat check
      Removal and installation of the fan and fan coupling
      Removal and installation of a broad tank
      Removal and radiator installation
      Removal and installation of the pump of cooling liquid
   + Heater
   + air Conditioner
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics

Removal and installation of a broad tank

Models 520i, 523i, 528i:


1. Open a stopper of a broad tank.

At the warmed-up engine before opening of a cover of a radiator put on it a thick rag to exclude a burn owing to emission of hot liquid and steam. There is a danger of accident. The cover can be opened only at temperature of cooling liquid below +90°С.

2. Unscrew a ventilating bolt (1) and bolts (2). Address to an accompanying illustration.

3. Remove the top part, take out a broad tank upward. Address to an accompanying illustration.


1. Replace sealing rings (shooters).
2. Insert a broad tank, fix the top part and a ventilating bolt.
3. Fill system with liquid and remove from system air, address to the Section Replacement of liquid of system of cooling. Check of frost resistance of a cooler. Visual check of system of cooling.
4. Start and warm up the engine and check tightness of connections.