External manifestation of a malfunction / breakdown / problem: Pump leak, smudges in the drainage hole area.
Probable Cause: Worn dynamic seal due to heavily contaminated cooling system.
External manifestation of a malfunction / breakdown / problem: Noise in the area of the mechanical seal.
Probable Cause: Noise may be due to dynamic seal scoring, usually due to system contamination or poor quality coolant.
External manifestation of malfunction/breakdown/problem: Leaking dynamic seal: streaks «pink» colors 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 use of sealant during installation. The application of sealant during installation of the pump is not required, as an o-ring is provided.
External manifestation of a malfunction / breakdown / problem: Leak through the drain hole, contamination of the pump housing.
Probable Cause: Leaking pump due to contamination of the dynamic seal by foreign particles (usually grease) in the coolant. Seal failure results in pump leakage.
External manifestation of a malfunction / breakdown / problem: Jamming of the pump; touching the impeller 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 improper timing belt tension. The sharp increase in radial load caused a higher degree of destruction of the pump bearing closest to the pulley.
External manifestation of a malfunction / breakdown / problem: Jamming of the water pump; obvious signs of bearing failure.
Probable Cause: Bearing misalignment and the resulting excessive radial load caused bearing damage, resulting in impeller seizure due to contact with the housing.
Severe damage to the dynamic seal.
This damage to the belt is obviously caused by over-tensioning the belt, a sign of which is wear and severe damage to the teeth.
The nature of the damage indicates an excessive radial load on the bearing, which led to its failure.
External manifestation of a malfunction / breakdown / problem: Leaking water pump through the drain hole.
Probable Cause: Damage to the dynamic seal by lime scale particles in poor quality coolant. The abrasive action of lime particles has led to the formation of scratches on the surfaces of the graphite and ceramic rings of the internal dynamic seal.
External manifestation of a malfunction / breakdown / problem: A crack in the ceramic ring.
Probable Cause: O-ring failure is caused by sudden temperature changes 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 a malfunction / breakdown / problem: Rust / water pump leak.
Probable Cause: Extensive water pump corrosion indicates insufficient ethylene glycol or additive in the coolant. In addition, there may be a burning smell, a large amount of sealant and dark-colored baked grease inside the pump. Most likely, damage and leakage of the water pump are caused by engine overheating.
External manifestation of a malfunction / breakdown / problem: Breakage of the lug of the flange of the pump housing.
Probable cause: Violation of pump installation technology. When installing, first lightly tighten all the bolts, then tighten them in the prescribed sequence with the appropriate torque specified in the vehicle operating instructions.
External manifestation of a malfunction / breakdown / problem: Noise during operation and leakage of the water pump.
Likely Cause: Too much limescale (insufficient amount of ethylene glycol or additive in the coolant). The presence of sediment has caused damage to the internal dynamic seal and noise during pump operation.
External manifestation of a malfunction / breakdown / problem: Cavitation, corrosion of aluminum alloy parts.
Probable Cause: Inappropriate coolant specifications or air in the cooling system. When the impeller rotates, a directed flow of air bubbles is formed, which has a devastating effect on the internal surfaces of the pump. The appearance of air bubbles occurs at a temperature of 90°C (just below the boiling point). With the recommended ratio of water and coolant, the normal operating temperature is 80°C.
External manifestation of a malfunction / breakdown / problem: Gas sinks.
Probable Cause: High operating temperature. The thermostat and temperature sensor should be checked and replaced if necessary.
External manifestation of a malfunction / breakdown / problem: Contaminated coolant; noise at work; solid sediment particles inside the housing.
Probable Cause: The presence of hard deposits inside the case is caused by the use of poor quality coolant or by ignoring flushing (cleaning) 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 lubricant is washed out of the bearing and, as a result, noise appears during operation.
External manifestation of a malfunction / breakdown / problem: Belt displacement on a toothed pulley; signs of wear on this part of the pump.
Probable cause: The position of the belt on the toothed pulley has not been adjusted, which is indicated by signs of wear on the pulley.
The position of the belt on the pulley.