Car engine cooling system BMW 5 Series E39

Coolant circulation
The circulation of the coolant is regulated by a thermostat. When the engine is cold, the coolant circulates only in the cylinder head, as well as in the...

Checking the cooling system
The cooling system's leaks and the operation of the steam-air valve in the expansion tank cap can be checked using a standard device. Warm up the engine while...

Removal and installation / checking the thermostat
As the engine temperature rises, the thermostat opens a large circuit of coolant circulation. If the thermostat remains closed due to a fault, the engine...

Removal and installation the fan/fan clutch
The fan clutch must be replaced when the hub has worn out. In this case, when the engine is not running, the fan does not rotate or rotates with difficulty....

Removal and installation the expansion tank
Models 520i, 523i, 528i Removal Remove the expansion tank cap. Caution: When the engine is hot, place a thick cloth around the expansion tank cap before...

Removal and installation the radiator
After a long mileage of the car, the narrow internal channels of the radiator can be clogged with sediment from the coolant and salt deposits. As a result, the...

Removal and installation the coolant pump
The coolant pump is driven by a poly V-belt. The radiator fan is bolted to the coolant pump shaft at the front. Removal Drain the coolant, see section "...

Diagnostics of cooling system faults
Malfunction: The coolant temperature is too high, the temperature gauge needle is in the danger zone.

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