[Water pump] What are the symptoms and causes in the event of a failure?Explanation of exchange timing and cost | Gunet pit full of information on vehicle inspection and repair

Engine -related parts replacement [2020.07.15 up]

[Water pump] What are the symptoms and causes in the event of a failure?Explains the exchange time and cost

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The water pump is a part required to circulate the cooling water of the engine.Therefore, if the water pump breaks down, the heat replacement of the engine will not be performed normally, which will lead to troubles such as overheating.This time, we will explain the time and cost of the water pump mechanism and structure, the symptoms and causes of failure, so that the water pump can be taken correctly in case of failure.

What is a water pump in the first place?

A water pump is an important part that circulates cooling water to cool the engine to an appropriate temperature and prevents the engine overheating.However, you may wonder, "What kind of mechanism is the car engine cooled?"So, first, I will explain the structure of the engine and the structure of the water pump.

The car engine is always burning fuel while driving and idling, so it is very hot as it is. In order to keep the high temperature engine at an appropriate temperature, cooling water circulates inside the engine, cooling the cooling water that has become hot with the heat of the engine with a radiator, and circulating the engine again. By changing the heat of the engine in this way, the troubles such as overheats have been prevented. The water pump is on the side of the engine, is operated by a timing belt or fan belt through pulley, forcibly circulating cooling water. Therefore, a water pump is an important part of the car that moves comfortably. If the water pump fails and does not perform normal operation, the cooling water will not be circulating, so the engine will quickly become hot and break down. And in the worst case, it can lead to major troubles such as overheating, engine stop, and in the worst case.

The water pump is roughly divided into the following five parts.

Flange is also known as a hub.It is connected to a part called "pulley" to operate the water pump itself to rotate the timing belt and fan belt of the car.

Shaft bearing is an important part that supports the axis of the rotating water pump.If the shaft bearing is abnormal, the water pump cannot be rotated normally, so it is the heart of the water pump.

The body of the water pump is made of aluminum die -cast and casting, making it a heat -resistant part.

The mechanical seal is a part that has the role of blocking the inside and outside of the water pump and blocking the cooling water so that it does not leak outside.If this part deteriorates, you will cause trouble in which cooling water leaks.

The impeller is a part that serves as a pump that sends cooling water.In the unlikely event that corroded due to aging or damage, the cooling water cannot be used normally, leading to an engine failure.

Symptoms of water pump failure

If you have symptoms such as "the engine smells inside the car" or "the sound is heard from around the engine", the water pump may be broken.Here, we will explain the symptoms that are likely to occur when the water pump fails as an example.

If the water pump breaks down, it often causes water leakage in cooling water.Please note that repair and replacement will be required when the following symptoms occur.

Although it differs for each model, cooling water is colored such as green, red, and blue so that it can be easily understood when water leaks occur.If cooling water is dripping on the ground, the water pump and radiator may be damaged.

Cooling water hardens white when dried.Therefore, if you find a white mass near the engine, you may need to be careful because it may be leaking.

Cooling water gradually decreases due to evaporation, but if it is normal, it rarely decreases significantly from the specified amount.If it is excessively reduced in a few weeks, it is likely that cooling water is leaking.

The cooling water has a sweet smell like cotton candy so that it is easy to notice abnormally.Therefore, if you smell a sweet in the car during riding or running, you may have leaked cooling water.

A symptom occurs when a water pump breaks down is "overheating".When the engine is overheated, the engine may not be able to demonstrate the performance, causing an abnormal noise, or the rotation of the engine may be weakly stopped.In the worst case, there is a danger of raising white smoke and burning or exploding, so make sure you have a full inspection to notice in advance.It would be nice if you could stop the engine immediately and stop the engine, but if you keep running without notice, it will overheat.If the water temperature gauge in the meter points to H (high temperature), stop the car immediately in a safe place, as there is a possibility of overheating.

Next, the most common symptoms of failure are "abnormal noise" due to water pump failure.If the water pump does not work properly due to damage such as deterioration, a strange noise such as "Kiiki", "War", and "Rattle" will be generated.At this point, the engine has not yet been hindered, but it is necessary to replace and repair the water pump as soon as possible.

Causes of a water pump failure

The most common reason for the water pump is a failure due to deterioration of cooling water. The water pump keeps the heat of the engine by replacing the heat of the engine and maintaining the appropriate temperature as the clean cooling water within the expiration date. However, if the old cooling water circulates inside the water pump, the metal inside will deteriorate, leading to water leakage. If cooling water is gone due to water leaks, the engine cannot be cooled and overheats occur, which is dangerous. Therefore, it is important to perform maintenance and inspection of cooling water on a daily basis. Regular refilling and replacement, and cleaning the cooling water route during replacement will prevent water pump failure. If you think that the cooling water is too fast and the cooling water in the reservoir tank is dirty, consult a car dealer or a maintenance shop.

If you can quickly notice the breakdown of the water pump, you will be able to prevent large parts such as the engine.Therefore, this item introduces the sign when the water pump breaks down.Be sure to grasp it so that you can deal with it in the unlikely event.

The water thermometer of the instrument panel is divided into "H (high temperature)" and "C (low temperature)", and in normal times, the needle of the water thermometer refers to the middle of H and C.If the engine becomes hot, the water temperature needle refers to the "H" part, so you will be able to notice the abnormality of the engine or water pump.If the water temperature system continues to run while pointing to H, it will be overheated, the water vapor rises from the engine room, causing a burnt smell such as oil.

As described above, the water temperature gauge can also check the breakdown of the water pump, but since the temperature of the engine gradually rises after running, it takes time to notice the abnormality.Therefore, in order to know the sign of failure in advance, it is recommended to check that there is no noise from inside the bonnet where the engine is.If the above -mentioned abnormal noise is generated, it is a sign that it has been abnormal, not just the water pump, so let's repair and replace it as soon as possible.

Water pump life and exchange time

The water pump is a part that may break down due to aging, no matter how much you have been inspected.Here, we will introduce the life and the time of the water pump in detail.Let's check in light of your car.

When replacing the water pump, it is recommended that you use it when the mileage reaches 100,000 km. The criterion of 100,000 km is not a water pump, but a guideline for the timing belt near the water pump. The water pump is basically replaced with the timing belt, so when the mileage reaches around 100,000 km and the timing belt is replaced, it is better to replace the water pump together. The reason why we recommend replacing the water pump and the timing belt at the same time is that the parts to be removed at the time of replacement are the same, and there is an advantage that the wage is low. The timing belt is in front of the water pump and is a part that operates the water pump, so both must be removed even if you replace it separately. The timing belt is an important part that controls the engine ignition timing, intake, and exhaust, so you have to pay close attention to removal and assembly. Therefore, it is desirable to have less removal and assembly.

Other than the mileage, it is a guide to replacement even when 10 years have passed since the last replacement.If you run on a general road, it is said that the mileage reaches around 100,000 km in about 10 years.There are many parts of the car that deteriorate by driving, but if you continue to use it for a long time regardless of the mileage, it will deteriorate and breakdown.Even if you haven't been running 100,000 km since the last replacement of the water pump, it may deteriorate after 10 years, so it is a good idea to use it as a guide.

Cooling water often leaks when the water pump is damaged, but one of the causes is a shaft bearing damage.If the shaft bearing is left as it is damaged, the deterioration of the water pump itself may progress, causing overheating.It is difficult for amateur eyes to judge that the shaft bearing is damaged and cooling water is leaking, so contact the car dealer or maintenance shop as soon as you find a leak and check it out.

How to replace the water pump

To replace the water pump, the timing belt requires removal, decomposition, and installation of fine parts.The timing belt is a part that plays an important role in car parts, so it must be handled carefully with the right knowledge.Therefore, it is a good idea to ask a car dealer or a maintenance shop to replace it, except for those who are very used to car maintenance.If you have a lot of knowledge about cars, try to work according to the steps below.However, be aware that if you cannot handle it correctly, the engine will be overheated and you will not be able to repair it, or parts that do not need to be replaced may be broken.

The replacement procedure for the water pump is as follows.In the unlikely event of a mistake, it is a task that will not only damage the car but also a major injury, so those who have a wealth of car maintenance knowledge will work.1.Remove the drain bolt at the bottom of the radiator and drain the cooling water.Remove the radiator.2. Move to a safe place while paying attention to handling so as not to damage the radiator fin.Remove the timing belt 4.5. Replace the water pump.6. After replacing everything, return it to the original.Clean the cooling water tank and the route with water to replenish the specified cooling water.At this time, since air is entered in the cooling water route, this work is fully removed, so this work includes detailed replacement work such as attaching and removing hoses and removing bolts, so we will proceed with the work based on that point.Let's do it.

What is the cost of replacing the water pump?

Many of the water pumps are about 10,000 yen, but if you ask a car dealer or a maintenance shop, you will have a replacement.Even if you add a wage or technical fee, the cost will be around 10,000 to 20,000 yen in total, but it may cost about 70,000 yen depending on the model.It is also recommended to replace the timing belt when replacing the water pump, but it may cost more than 100,000 yen, so let's have a firm estimate.If the price is expensive, if the repair is postponed, the engine may break down and cost more expensive.Be sure to keep regular maintenance on a regular basis so that it does not happen.First of all, inspection of cooling water is the first step to prevent trouble.

summary

This time, the water pump mechanism and structure that circulate the engine cooling water, the replacement time, the cost, and the exchange method in addition to the symptoms and causes during failure.Cooling water absorbs the heat of the engine and keeps it at a normal temperature is a very important part of a circulating water pump.Therefore, open the bonnet on a regular basis to check the cooling water, and check for leaks and cooling water deterioration.Please refer to this article as you can avoid troubles by always performing maintenance and noticing trivial abnormalities.

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A professional group of automobile maintenance that produces maintenance articles such as vehicle inspection / inspection, oil change, repair, painting, sheet metal, and installation and installation.I hope that it will help people who are in trouble with how to maintain their car.

A professional group of automobile maintenance that produces maintenance articles such as vehicle inspection / inspection, oil change, repair, painting, sheet metal, and installation and installation.I hope that it will help people who are in trouble with how to maintain their car.

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