APPLICABILITY: VAZ 2101, 2102, 2103, 2104, 2105, 2106, 2107, VAZ 2121, 21213, 21214, 2131 (Niva), VAZ 2123 (Niva-Chevrolet, CHEVROLET NIVA).
Country of origin: Italy.
The water pump must solve several tasks:
- provide a more uniform temperature in different parts of the cooling system;
- smooth out sudden temperature fluctuations (eliminates the "thermal shock effect" when the engine speed changes sharply);
- deliver the heat carrier to the radiator of the heater, ensuring that the interior is warmed up.
A water pump consists of a housing containing a bearing with a shaft. The drive pulley is pressed at one end of the shaft, and the impeller (impeller) is pressed at the other end. On the side of the impeller, there is a sealing element (oil seal) on the shaft that protects the bearing from liquid ingress.
Body. Two types of materials are widely used-cast iron and aluminum. Aluminum is a more modern material and allows you to create cases of complex shapes with strict adherence to dimensions, which makes it possible to install the bearing "vnatyag". Cast-iron pump housings are used, as a rule, on heavy-duty vehicles – where the engine speed is low, but a long service life of the part is required.
Bearing. Typically, two radial bearings are used, with grease placed between them. Outdated design – two open-type ball bearings are located separately on the same shaft and are fixed from turning by screws. It is possible to additionally press the lubricant between the bearings, for which the pump housing is located on the oil press. The modern design used in pumps " – a double-row ball or ball-roller bearing of a closed type, is rigidly pressed into the pump body. This type of bearing uses a high-temperature grease that does not require replacement for the entire service life of the bearing and pump.
Pulley. It is made of steel. The pump can be fitted with either a toothed or a wedge pulley. In some cases, the pulley is not included in the water pump and is attached additionally. The accuracy of the pulley dimensions depends on the transmission of torque and the service life of the drive belt.
Impeller. It is made of aluminum. It is the main "Executive mechanism" of the water pump.
Sealing element (oil seal). Designed to seal the bearing and protect it from liquid ingress. It is the most important part of the water pump – due to the" dynamic nature " of the pump operation, the sealing element is constantly under serious load.
Included: water pump, gasket and hairpin.
LADA 2101 2102 2103 2104 2105 2106 2107 RIVA NOVA LAIKA
2121 21213 21214 2131 NIVA 4x4 Urban