Engine Cooling System — Design Description The engine cooling system is liquid, sealed with forced circulation. 1 - radiator; 2 - temperature sensor; 3, 17, 20, 22 - hose; 5 - bolt (М6х25); 6 -...
Radiator — design description Radiator (1, fig. 3.17) designed to remove heat from the coolant and is made in the form of a horizontally located set of aluminum tubes with the right and...
Coolant Pump — Design Description Centrifugal type coolant pump (25. fig. 3.17) mounted on the front timing cover of the engine block. 1 - radiator; 2 - temperature sensor; 3, 17, 20, 22 -...
Thermostat — design description Thermostat (6. fig. 3.17) designed to turn on and off a large circle of engine coolant circulation, depending on its temperature state. 1 - radiator; 2 -...
Expansion tank — design description Expansion tank (see fig. 2.22) serves to fill the system with coolant, a volume to keep the liquid expanding with increasing temperature and to connect the...
Fan and viscous coupling The nine-blade fan 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 420 mm...
Coolant temperature sensor A three-pin coolant temperature sensor is installed on the fitting on the left side of the engine cylinder head. Signals from the sensor are sent to the engine...
Coolant (antifreeze) Coolant (antifreeze) used on engines is based on a mixture of antifreeze, anti-corrosion liquid and softened water. When replacing antifreeze, be sure to flush...
Thermostat check Checking the thermostat, given its non-separable design, must be carried out in the following order. Place the thermostat housing on a container of water so...
Instructions for working on the cooling system When working on the cooling system, there is always a risk of steam burns, so all work must be carried out only on a cold engine. Open the cooling system only...
Coolant replacement The coolant should be filled through the expansion tank of the cooling system and brands strictly certified by the company «BMW». The mark on the expansion...
Replacing the fan and its clutch The engine cooling system uses an 11-bladed fan with a diameter of 420 mm. The viscous fan clutch must be replaced if its hub has burrs that prevent the free...
Coolant pump replacement The coolant pump is driven by a V-ribbed auxiliary drive belt. In front, on the pump shaft, a fan impeller with a viscous coupling is fixed. The design of the...
Replacing the thermostat of the cooling system Thermostat built into the housing (6, see fig. 3.17) and it can only be replaced as an assembly. 1 - radiator; 2 - temperature sensor; 3, 17, 20, 22 - hose; 5...
Removal and installation of a radiator The radiator is changed if there are deposits in its tubes (lime) and overheating of the engine for this reason. If oil gets into the radiator, it must be...
Flushing the radiator Attention! If oil gets into the cooling system circuit, it is necessary to flush the radiator and the radiator expansion tank with special cleaning agents....