The long-term operation is prone to problems.

When a car engine is used for a long period of time, how to reduce the temperature is an important step to ensure the life of the engine. The engine water pump has such an important function. Therefore, the majority of owners in the daily maintenance and repair, do not miss the repair of the pump, and now Xiaobian for the majority of users to introduce the six steps to repair the pump to ensure that the engine pump can be a smooth cycle.

1. Check the pump and pulley for wear and damage and replace if necessary. Check whether the water pump shaft is bent, the degree of wear of the journal, and whether the shaft end thread is damaged. Check whether the blade on the impeller is broken and whether the shaft hole wears seriously. Check the degree of wear of water seals and bakelite washers. Replace them if they exceed the usage limits. Check the bearing's wear condition, can use the watch to measure the bearing clearance, if exceeds 0.10mm, should replace the new bearing.

2. After the engine water pump is taken out, it can be decomposed in order. After the decomposition, the parts should be cleaned and checked one by one to see if there are defects such as cracks, damage, and wear. If there are serious defects, they should be replaced.

3. Water seal and seat repair: If the water seal wears grooves, it can be grinded with an emery cloth, and should be replaced if worn out; if the water seal seat has rough scratches, it can be repaired with a flat reamer or on a lathe. Replace the new water seal assembly when overhauling.

4. The weld repair is allowed on the pump body with the following damage: the length is within 30mm, and the crack does not extend to the bearing seat hole; the flange that engages with the cylinder head has a broken portion; and the oil seal seat hole has damage. The bend of the water pump shaft must not exceed 0.05mm, otherwise it should be replaced. Impeller blade damage should be replaced. The water pump shaft hole wear should be replaced or repaired.

5. Check if the bearing of the water pump rotates flexibly or with abnormal noise. If there is any problem with the bearing, it should be replaced.

6. After the engine water pump is assembled, rotate it by hand. The pump shaft should be free from sticking and the impeller and pump housing should not be rubbed. Then check the pump displacement. If there is a problem, check the cause and remove it. If the pump fails, the coolant will not reach the corresponding place, and its performance will not be effectively exerted, ultimately affecting the working conditions of the engine. Therefore, the inspection of the water pump must be strengthened.