Car engine cooling system BMW 5 Series E28

General information about the engine cooling system
All models described in this manual are equipped with positive pressure cooling systems in which the circulation of the coolant is controlled by a thermostat....

General information about antifreeze
Do not allow antifreeze to come into contact with exposed areas of the body or painted surfaces of the car. If any drops accidentally come into contact with...

Checking the operation and replacing the thermostat
Do not remove the radiator cap, drain the coolant, or replace the thermostat before the engine has cooled completely. Examination 1. Before you conclude that...

Removal and installation the radiator
Allow the engine to cool completely before starting work. If you are going to remove the radiator due to leaks, remember that minor leaks can be fixed without...

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

Checking the operation of the water pump
A failed water pump can cause serious engine damage due to overheating. There are two ways to check the water pump without removing it from the engine. If one...

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

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

Diagnostics of cooling system faults
Symptom Possible cause Overheat The coolant level in the system has dropped (see chapter Routine car maintenance ). The water pump drive belt is faulty or its...