In engine failure, the failure of water pump accounts for a certain proportion, such as high water temperature is the engine

Common faults, and a considerable part of the high water temperature is caused by the failure of the pump. Generally speaking, hair

In order to ensure the quality of maintenance, the pump of the motive enters the period of high incidence of failure when it has been used for about 100,000 km

Many pumps can only be replaced as a whole after being damaged, and only a few commercial cars are sent

The pump of the motor can be repaired by replacing bearings or water seals separately.

More and more pumps use camshaft timing tape as transmission tape, timing tape outside most

There are plastic protection plates, so it is difficult to find the hidden trouble of the pump in the daily maintenance of the vehicle

Line maintenance is also more troublesome. The common faults of water pumps are impeller damage, water leakage and bearing death.

(1) Impeller damage The common form of impeller damage is impeller cracking , impeller from the pump shaft.

Loose or impeller corrosion, impeller corrosion generally does not cause engine failure. Impeller cracking or impeller from the pump

When the shaft is loose, the coolant circulation speed becomes slow, which easily causes the fault of engine temperature being too high. Damage to the

The impeller may also impact the pump shell when rotating, resulting in shell fragmentation.

Impeller damage is usually due to the abnormal high temperature of the engine, some because

Pump impeller quality problems. Check whether the impeller is damaged, most pumps can only be removed to see

The condition of the impeller, some engines can touch the pump impeller by hand after removing the thermostat.

(2) water pump leakage water pump leakage is a common part of the water seal leakage and water pump and cylinder surface leakage.

After water seal damage, coolant will generally leak from the pump shaft. Some pumps have overflows at the pump shaft

Hole, its role is to determine whether the water seal leaks and discharge water leakage from the pump. When the water seal is damaged, cool it.

The fluid will flow out of the spillhole, and if the spillhole is blocked, the leaking coolant will enter the pump bearing,

Cause bearing damage.

The common reason for water leakage is the damage of the rubber seal ring of the pump or the pump shell

The sealing gasket between the joint surface of the block and cylinder block is damaged. Antifreeze has a certain color and radiates when heated

A special smell, so you can work through the engine can smell the smell of antifreeze or observe the pump

See if there’s a trace of antifreeze nearby to determine if the pump is leaking.

(3) There are few cases of dead bearings, but once there is a situation of dead bearings

Some engines using timing tape to drive water pumps will have serious consequences, light timing tape damage

If not, the engine valve will be jacked by the piston . Pump bearings are mostly maintenance-free bearings,

There will be abnormal sound or water pump leakage due to bearing eccentric wear before the occurrence of locking, so in the daily check or

It is very important to check the water pump during routine maintenance. It is recommended to replace the timing tooth tape and other related parts

The water pump should also be checked. It should be noted that when there is abnormal sound near the pump, it will sometimes be transmitted

The slippage of moving tape was mistaken for a pump.