Auto pump troubleshooting and maintenance.
The main signs that your car's water pump is failing include :
coolant leak : This is one of the most obvious signs of trouble, if you find a green or red liquid dripping under the car, it is likely that the coolant is seeping from the seal or crack of the pump and the pump needs to be replaced.
overheating : If your car's temperature gauge reads too high or you see steam coming out from under the hood, it may be because the pump is not working properly, preventing the coolant from flowing and heating up the engine, which is a very dangerous situation.
Unusual noise : If you hear rattling or whistling from the engine compartment while driving, it may be because the pump bearing or belt has been worn or loosened, causing the pump to operate unsteadily.
oil contamination : If the oil becomes cloudy or milky when checking the oil level, it may be because the seal of the pump has broken, causing the coolant to enter the tank, the tank needs to be cleaned immediately, and the pump and oil are replaced.
Rust or deposits : If rust or deposits are found on the surface of the pump when it is inspected, it may be because the coolant contains impurities or inappropriate ingredients, resulting in corrosion or blockage of the pump.
Specific repair steps and methods include :
Check pump body and pulley : check for wear and damage, should be replaced if necessary. Check whether the pump shaft is bent, the degree of journal wear, and the shaft end thread is damaged.
decomposing water pump : take out the water pump and decompose it in sequence, clean the parts and check whether there are cracks, damage and wear and other defects one by one, if there are serious defects, they should be replaced.
repair water seal and seat : if the water seal is worn out, use emery cloth to smooth; Replace if worn out. If the water seal seat has rough scratches, it can be repaired with a flat reamer or on the lathe.
check the bearing : check the wear of the bearing, the bearing clearance can be measured with a table, if more than 0.10mm, it should be replaced with a new bearing.
assembly and inspection : After the pump is assembled, turn it by hand. The pump shaft should be free from stuck, and the impeller and the pump shell should be free from friction. Then check the pump displacement, if there is a problem, should check the cause and rule out.
Precautions and precautions :
regular check : regularly check the condition of the water pump, especially when the car is driving to a certain distance, you should check the condition of the water pump, just in case.
Keep it clean : Clean the cooling system regularly and use a suitable coolant to prevent corrosion or blockage of the pump.
Watch out for anomalies : If you hear unusual noises or find anomalies such as coolant leaks while driving, stop the car immediately to check and seek professional help.
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