Diesel engine cooling system BMW X5 E53

Engine cooling system — general information
The engine cooling system is liquid, sealed with forced circulation. The cooling system includes cooling jackets (cylinder heads and blocks); aluminum cross...

Coolant pump — design description
The coolant pump is of the centrifugal type and is mounted on the front end wall of the engine cylinder block. The pump shaft is driven by a poly-V...

Radiator — General Information
The radiator is designed to remove heat from the coolant and is made in the form of a horizontally located set of aluminum tubes with right and left tanks. The...

Expansion tank — general information
The expansion tank serves to fill the system with cooling liquid, with a volume that ensures the preservation of the liquid expanding with increasing...

Thermostat — General Information
The thermostat is designed to turn on and off the large circle of circulation of the engine coolant, depending on its temperature state. The temperature of the...

Fan and viscous coupling
The fan has nine blades, is mounted on the coolant pump shaft and is designed to create an air flow through the radiator. The fan impeller has a diameter of...

Coolant temperature sensor
The coolant temperature sensor is a three-pin sensor, mounted on the fitting on the left side of the engine cylinder head in the area of the 6th cylinder....

Coolant — General Information
The coolant (antifreeze) used in diesel engines is identical to that used in petrol engines (see above). The cooling system of BMW vehicles is filled only with...

Replacing the coolant pump
Attention! When working on the oil, fuel and coolant circuit, protect the generator from contamination. Avoid damaging the sealing surfaces on the engine...

Replacing the cooling system thermostat
The thermostat is built into the housing and can only be replaced as an assembly. The cooling system thermostat must be replaced in the following order. Drain...

Replacing the coolant
Attention! Replace the coolant only on a cold engine, due to the risk of getting burned by steam. Protect the generator from contamination. Place a container...

Replacement of the casing and electric fan
Attention! When performing work, do not allow damage to the radiator fins. The fan casing must be replaced in the following order. Read information from the...

Checking the cooling system for leaks
Attention! All work on checking the tightness of the cooling system should be carried out on a cold engine, to avoid steam burns. Residual coolant can stick...

Checking the filler cap overpressure valve
Attention! The "DIS" system pressure indicator shows the absolute pressure value taking into account the ambient pressure. The filler cap overpressure valve...

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BMW E53 (1999-2006)