External manifestation of malfunction/breakdown/problem: Pump leak, drips in the drainage hole area.
Probable cause: Wear of the dynamic seal due to severe contamination of the cooling system.
External manifestation of malfunction/breakdown/problem: Noise in the area of the end seal.
Probable Cause: The noise may be caused by scoring of the dynamic seal, usually due to contamination of the system or use of poor quality coolant.
External manifestation of malfunction/breakdown/problem: Leak along the dynamic seal: "pink" colored streaks in the area of the drainage hole.
Probable Cause: Dynamic seal leak caused by pump contamination. The pink tint is most likely due to the sealant used during installation. There is no need to apply sealant when installing the pump, as a sealing ring is provided.
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External manifestation of malfunction/breakdown/problem: Leak through the drainage hole, contamination of the pump body.
Probable cause: Pump leak due to contamination of the dynamic seal with foreign particles (as a rule, plastic grease) in the coolant. A failure of the seal will result in a pump leak.
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External manifestation of malfunction/breakdown/problem: Pump jamming; impeller touching the housing due to shaft misalignment; rust on the impeller; bearing failure.
Probable Cause: This failure is due to damage to the bearing raceways caused by excessive radial load on the pump shaft due to inadequate timing belt tension. The sharp increase in radial load resulted in a higher degree of destruction of the pump bearing closest to the pulley.
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External manifestation of malfunction/breakdown/problem: Water pump jamming; clear signs of bearing failure.
Probable cause: Bearing misalignment and the resulting excessive radial load resulted in bearing failure, followed by impeller seizure due to contact with the housing.
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Severe damage to the dynamic seal.
This type of belt damage is obviously caused by excessive belt tension, which is indicated by wear and severe damage to the teeth.
The nature of the damage indicates excessive radial load on the bearing, which led to its failure.
External manifestation of malfunction/breakdown/problem: Water pump leaking through the drainage hole.
Probable Cause: Damage to the dynamic seal due to limescale particles in poor quality coolant. The abrasive action of lime particles resulted in scratches on the surfaces of the graphite and ceramic rings of the internal dynamic seal.
External manifestation of malfunction/breakdown/problem: Crack in the ceramic ring.
Probable Cause: Ring failure is caused by a sudden temperature change due to adding cold coolant to a hot system or running the water pump without coolant. In addition, the cause of such damage may be the use of low-quality coolant.
External manifestation of malfunction/breakdown/problem: Rust/leak of water pump.
Probable Cause: Extensive corrosion of the water pump indicates insufficient ethylene glycol or additive in the coolant. In addition, there may be a burning smell, a large amount of sealant and baked dark-colored plastic grease inside the pump. Most likely, the damage and leakage of the water pump is caused by engine overheating.
External manifestation of malfunction/breakdown/problem: Breakage of the pump body flange eye.
Probable cause: Violation of pump installation technology. When installing, first lightly tighten all bolts, then tighten them in the prescribed sequence to the appropriate torque specified in the vehicle operating instructions.
External manifestation of malfunction/breakdown/problem: Noise during operation and leakage of the water pump.
Probable Cause: Excessive limescale deposits (insufficient ethylene glycol or additives in the coolant). The presence of sediment led to damage to the internal dynamic seal and the appearance of noise during pump operation.
External manifestation of malfunction/breakdown/problem: Cavitation, corrosion of aluminum alloy parts.
Probable Cause: Incorrect coolant characteristics or air in the cooling system. When the impeller rotates, a directed flow of air bubbles is formed, which has a destructive effect on the internal surfaces of the pump. Air bubbles appear at a temperature of 90°C (just below boiling point). With the recommended water to coolant ratio, the normal operating temperature is 80°C.
External manifestation of malfunction/breakdown/problem: Gas sinks.
Probable cause: Increased operating temperature. The thermostat and temperature sensor should be checked and replaced if necessary.
External manifestation of malfunction/breakdown/problem: Contaminated coolant; noise during operation; solid sediment particles inside the housing.
Possible Cause: The presence of solid sediment inside the housing is caused by using low-quality coolant or ignoring flushing (cleaning) the cooling system before installing a new water pump. There is a circular scratch on the entire surface of the internal mechanical seal. As a result, the water pump leaks, the grease is washed out of the bearing and, ultimately, noise appears during operation.
External manifestation of malfunction/breakdown/problem: Belt displacement on the toothed pulley; the presence of signs of wear on this part of the pump.
Possible cause: The position of the belt on the toothed pulley was not adjusted, which is indicated by traces of wear on the pulley.
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Position of the belt on the pulley.