BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
- Cooling systems, heating
   - Cooling system
      Check of the cooling system
      Removal, installation and check of the thermostat
      Removal and installation of the fan and coupling of the fan
      Removal and installation of a broad tank
      Removal and installation of a radiator
      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
+ Schemes of electric equipment
+ 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 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 a temperature of cooling liquid below +90 °C.

2. Turn off a ventilating bolt (1) and bolts (2). Address an accompanying illustration.

3. Remove the top part, take out a broad tank upward. Address 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 air from system, address the Section Cooling System Liquid Replacement. Check of frost resistance of a cooler. Visual check of the cooling system.
4. Start and warm up the engine and check tightness of connections.