Car engine cooling system BMW 5 Series E28

General information about the engine cooling system
All models described in this manual are equipped with pressurized cooling systems in which coolant circulation is controlled by a thermostat. A vane-type water...

General information about antifreeze
Do not allow antifreeze to come into contact with exposed areas of the body and painted surfaces of the car. Accidental drops should be washed off immediately...

Checking the operation and replacing the thermostat
Do not remove the radiator cap, drain the coolant, or replace the thermostat before the engine is completely cool. Examination 1. Before concluding that the...

Removal and installation of a radiator
Allow the engine to cool completely before starting work. If you are going to remove the radiator because of leaks, remember that minor leaks can be fixed...

Checking the operation, removing and installing the engine cooling fan and its drive clutch
To avoid possible damage, DO NOT operate the vehicle with the engine cooling fan not running. Do not attempt to repair damaged fan blades - replace the fan. In...

Checking the operation of the water pump
Failure of the water pump can cause severe engine damage due to overheating. There are two ways to check the operation of the water pump without removing it...

Removal and installation of the water pump
The engine must be completely cool before starting work. If your car's radio is equipped with an anti-theft system, make sure you have entered the correct code...

Checking the operation and replacing the coolant temperature sensor
The engine must be completely cool before starting work. The coolant temperature indication system consists of a temperature gauge mounted in the instrument...

Diagnosis of malfunctions of the cooling system
Symptom Possible reason Overheat Dropped coolant level in the system (see chapter Car maintenance ). The water pump drive belt is faulty, or the adjustment of...