10 Things to Consider When Buying Engine Mechanical Water Pump

The following are issues you may face with the water pump:

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1. Leakage from the weep hole - The water pump has internal mechanical seal; this is sealed to the shaft towards the cooling circuit. The job of the seal is to protect the bearings by not allowing coolant to pass on into the bearing assembly. Some seepage is common during the break-in period, but increased seepage and drips from the weep hole is not good. Also, if there's a large coolant bleed mark visible around the week hole then it indicates an impending water pump failure. Usually a contaminated coolant causes this level of weep hole leakage.
2. Leakage from The Mounting Surface - At times, you will be able to notice seepage, large coolant bleed marks or drips on or near the mounting surface or even on the housing. In such a scenario you can be assured that the water pump has not been installed properly.
3. Presence of corrosion and rust - Contaminated or non-compatible coolant can cause a defect in the pressure cap, this causes air bubbles and causes rust to form much faster. Look for signs of corrosion of the impeller fins, this will cause the pump to not be as effective in moving the coolant. Corrosion can also happen if mixing of different coolants has happened.
4. Build-up of deposits - At times mixing of coolants, or using the wrong coolant can cause deposits, sludge and scale to get built up on the inside of the water pump. This in turn will negatively affect the functioning of the individual components of the water pumps.
5. Cavitation - What we visualise as bubbles are actually vapour cavities. These can be seen in the coolant, which lead to pockmarking the individual components of the water pump. These areas get corroded away. These bubbles can be found at the inlet of the pump, where the coolant comes in. The increase in pressure causes the bubbles to implode and collapse with explosive force, thereby damaging the water pump.
6. Damages to the bearing - Rumbling sounds or screeching noises that may be heard from the water pump indicate a word bearing. You can check this by switching off the engine and observing the bearing from side to side and see if there’s any play at the shaft. Apply a little bit of hand pressure, there should be absolutely no play at all. A misaligned belt can be the reason for excessive wear of the water pump. Mechanical seal which is damaged will allow the coolant to leak through the bearings and clear away the lubricator.
7. Damaged or Broken Shaft - You can know by observing the signs if the shaft was broken instantaneously or with gradual damage. You may sometimes see that the shaft is either bent or broken and not working fine. If there's a clean break, then it was due to sudden overload or imbalance, whereas if the shaft that is broken is discoloured, then it was gradual. Excessive heat build-up can cause the shaft to become blue and then break, because of prolonged stress. This issue happens if the belt is misaligned, an over-tensioned belt will impose too much bending force on the shaft, this will force it to bend and cause shaft fracture. Lack of maintenance can also cause this problem, as excessive vibrations aren’t good for the shaft.

We have listed few symptoms to pick up on a faulty water pump quickly so that you can resolve the issue and save your vehicle from more damage.

1. Coolant Leak present at the front-center of your vehicle -If you can find coolant leak from your vehicle at the front of your car, it could be because of the water pump. It will be present at the center of your vehicle’s motor location. Why this happens is a little technical. The water pump of a vehicle comprises multiple gaskets and seals that keep the coolant in and ensure that there’s a consistent flow of it delivered from the radiator to the engine. With time, the gaskets and the seals wear out. They dry up and crack or sometimes break. This results in the leaking coolant. In case you notice coolant leak under your car seat, then you will need a professional mechanic to inspect the problem. The coolant will be green or even red. This kind of leak is mostly because of a leak in the water pump, which will require immediate fixing to avoid more complicated issues to arise in the future.
2. Rust, Deposit Build-up, and Corrosion of the Water Pump - A leakage in the water pump will eventually cause different materials to build around the pump. If you’re able to notice rust on the pump's surface due to contaminated or non-compatible coolant mixture then you struggle to resolve. A defective pressure cap will let in excess air which also causes corrosion. Deposit build-up happens because of wrong coolant; this will not only spoil the water pump but also impact the process of cooling the engine. You may also sometimes find small holes from corrosion in the metal, or cavitation - vapour bubbles in the coolant liquid that collapse with enough force to create cavities on the mounting surface. In such a case, you will have to replace the water pump immediately.
3. Loose water pump pulley making whining sounds - A loose belt can cause harmonic buzzing or even whining sound as it circulates, you may hear it from time to time as a high-pitched sound too. It will come from the front of the motor. The belt will become loose because of a pulley, which has also become loose, or if bearings that operate the water pump assembly aren’t functioning properly. If the sound, you’re able to hear from the form of the motor, increases as you accelerate then you will need assistance from a mechanic to thoroughly inspect your vehicle.
4. Engine is Overheating - By now you have understood that a failed water pump cannot circulate coolant through the engine block, which will cause the inevitable overheating of the engine. If this is ignored, then it can cause extensive damage to the engine, which will be expensive to resolve. The damage can extend on to cracking cylinder heads, pushing off head gaskets and even burning pistons. A higher than normal engine temperature showed on the gauge frequently is a sign that intervention is needed. And this could very well be because of the water pump. Get hold of a mechanic to help you narrow down the issue and resolve it.
5. Steam Coming from the car radiator - A sure shot sign of engine overheating is steam coming out of the radiator. This may happen while you’re driving or even when you stop. In such a case, pull over to a safe spot and source help from a mechanic. A non-functional water pump can cause the engine to overheat. Do not drive a vehicle which has an overheated engine, as it’s not safe.

The water pump is essential for circulating the coolant and transferring heat from the engine to the radiator. In most cases, it is a simple pump driven by a serpentine belt, timing belt or chain. Basically, the pump pushes the coolant into the cylinder block and cylinder head, where heat is absorbed. The coolant flows past the thermostat – when it is open – into the radiator, where it cools before returning to the pump. It is important to know how to choose the best water pump company in order to get the best quality.

Aspects to consider when choosing the best water pump company to work with

A pump is any hydraulic machine that increases the total mechanical energy of a fluid, in most cases coolant. There are a few factors to consider when purchasing a water pump or when you are looking for the best water pump company to work with.

Quality

First of all, you should consider the brand of the water pump. Carry out the necessary research to find the correct water pump for your vehicle, and then choose the best manufacturer that makes quality water pumps for cars. This aspect is very important because if the water pump is not good enough, in a few years you probably would need to change it again.

Service

In most cases, many people buy products that are not certified or have no warranty. As a result, you end up with an unreliable and short-lived product. A little research needs to be done before purchasing a water pump for any car or truck. You don’t want to be disappointed with how it works. If you work with a brand with experience and reputation, the chances are higher that their product will last longer, and you will also receive a guarantee in case something goes wrong.

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Trust

This is usually not an area we pay much attention to when choosing water pumps, but choosing a reliable manufacturer can be critical. It is convenient to work with a supplier who has a long history and can ensure that his work meets the quality standards set by the industry. So, don’t trust blindly, do deep research on water pump manufacturer companies, search online reviews and check the material and quality, also check they have good customer service.

Guarantee

This is a quite tricky area to pinpoint as there are many cars and trucks on the roads that still perform as well as ever on a water pump with over 200km of range. If you still have the user manual, it’s always a great idea to see what the manufacturer’s recommendations are. Each vehicle operates under slightly different conditions, which differ in the life of its components. Only your manufacturer will understand the exact life expectancy of each of those running inside their vehicles. So check out the manufacturer guarantee of your water pump.

Experience

Experience is of great importance; of course, an experienced manufacturer knows all the intricacies of services and products. An experienced manufacturer never disappoints you: they know what their customers need and how to satisfy them. Check out the company’s experience and certifications, options and specifications before purchasing a water pump.

Keep reading: Which are the most important vehicle spare parts

Why to choose Dolz instead of any other manufacturers?

Dolz is a European based company that has a set of standards in terms of innovation, efficiency, reliability and sustainability in its worldwide supply solutions that help their partners and customers move water pumps where it needs to be. Dolz offers a wide range of pumps to meet different technical requirements, offering quality solutions for water pumping systems.

Their maximum pump performance is linked to the detailed design of the engine. They use advanced technical resources to achieve the best results in the market. Each of the water pumps is made of high-quality material. The company has made every effort to ensure durable and efficient engineering solutions while maintaining an unrivalled level of efficiency even in the most challenging conditions.

Contact us to discuss your requirements of Engine Mechanical Water Pump. Our experienced sales team can help you identify the options that best suit your needs.