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In addition to our OE heritage, NTN also offers a line of OE-quality wheel hubs to the automotive aftermarket under the BCA Bearings product line. Learn more about BCA Bearings here BCABearings.com.

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Water pumps typically fail due to a broken impeller, bad bearing assembly or faulty shaft seal. These problems are usually caused by one of the following:

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Inside the water pump is an impeller — a centrifugal fan that’s designed to move water through your engine and cooling system. This impeller is attached to a shaft that’s supported by a bearing assembly. When the serpentine belt turns the water pump pulley, the impeller spins and pumps your coolant.

Solution: Use premixed coolant that is compatible with your vehicle. When using a coolant concentrate that needs to be mixed with water, use distilled water only and follow the coolant instructions carefully.

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Due to the overheating risk, a car with a leaking water pump should not be driven. Coolant leaks allow air into the cooling system, creating air pockets where hot spots can occur and damage other components. If the water pump is leaking, consider getting the vehicle towed to a repair shop.

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The water pump is usually mounted on the front of the engine and driven by the serpentine belt, or timing belt. A mounting gasket is used to form a seal between the water pump and the engine block.

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The advantages of GEN.1: compact, better reliability and simpler mounting process. It is one of the most used wheel bearings.

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Solution: Have your vehicle inspected and serviced at regular intervals. Be aware of the average lifespan of your stock or replacement water pump.

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A leaking water pump shaft seal or mounting gasket can cause a low coolant level. You may see a puddle of coolant under your car or notice moisture under the hood. Sometimes, there may be a green or blue film on the front of the engine or on the hood insulation material as coolant leaking on to a hot engine will evaporate.

In addition, the integration of the bearing in the vehicle can also provide a transmission function in the case of a driven wheel (drive provided via the spline in the bore).

Wheelhub bearing

3rd generation bearings incorporate two mounting functions: attachment to the chassis and the fixing to the disc brake and the rim of the wheel by the flanges incorporated into the inner and outer rings.

Vehicles of different brands require certain kinds of coolant, which are designated not just by color, but explicit compatibility with the make. This is because the chemical makeup of coolant is optimized for the variety of metals used in a particular engine to prevent corrosion. For the water pump specifically, the coolant also acts as a lubricant. Not using the correct coolant or coolant-water ratio will result in the moving parts of the water pump not being lubricated properly, leading to premature failure.

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Dirty or contaminated coolant can cause the pump shaft seal to fail prematurely. It can also eat away at the impeller blades or the impeller shaft. Using only water in a cooling system can result in corrosion not only in the water pump, but in the channels of the engine head, block, and heater core.

The amount of disassembly and work involved in a water pump replacement varies greatly from car model to car model. The coolant that must be removed as a result of this repair must also be disposed of properly and responsibly. This is typically a repair best left to a professional.

If the water pump fails, your engine likely won’t get adequate coolant circulation, which will make it overheat. If the water pump or another component in the cooling system is beginning to fail, you will notice the temperature gauge on your dashboard begin to rise. It is recommended to stop driving your vehicle if your car begins overheating. Overheating even once can cause extensive engine damage, such as a cracked cylinder head or block.

Solution: Have your cooling system flushed at regular intervals. This interval will vary with your make and model, and with the type of recommended coolant.

NTN products are critical to keep the world moving smoothly. Our bearings and related products are present in a wide variety of industries. Please see the industries below that have applications for this product category.

Wheelhubassembly

To meet the need for greater simplicity and reduce weight, expected by manufacturers, NTN offers a range of bearings where the inner and outer rings incorporate additional mounting functions: clamps, flanges or mounting holes for easy mounting onto the chassis of the vehicle.

Between all its moving parts and the fact that it burns fuel, it’s no surprise your engine gets hot when it’s running. This is where cooling system comes into play, and your water pump plays a key role in it. If the water pump fails, you’ll want to get it diagnosed by a mechanic quickly, as you run the risk of your engine overheating.

The first applications used single row bearings, mounted in pairs. Compared to this type of conventional bearing arrangement, NTN GEN 1 wheel bearings incorporates 2 rows of rolling elements which require no setting (no pre-loading or alignment).

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Solution: Regularly check the level of coolant in the reservoir. If you notice the coolant level consistently dropping, even after adding more coolant, then there likely is a leak in the cooling system.

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Water pumps don’t last forever. In some cases, the bearings in the pump may just wear out. This may be accelerated by a poor pump design.

NTN satisfies more than 30% of the demand for North American OE vehicle production from NTN’s Elgin, Illinois plant. The Elgin plant is the largest manufacturer of hub assemblies in North America, providing more product to OEMs and the Aftermarket than any other single facility. This gives NTN the benefit in the Aftermarket of supplying highly-engineered replacement parts that meet or exceed OE engineering specifications.

An incremental evolution of the Gen 2 wheel hub assembly, NTN’s Gen 2.5 hub assemblies offer all of the benefits of the Gen 2 hubs, but are designed for inner ring rotation with a hub spindle installed. Engineered for driven and non-driven wheel applications, the Gen 2.5 can feature either a pressed in or roll-formed assembly.

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Your car’s water pump pushes coolant through the engine, hoses and radiator in order to keep the engine at an optimal temperature while it’s running. The coolant absorbs heat created during the combustion process in the engine and then releases it while traveling through the radiator.

When replacing the water pump, the drive belts may need to be removed. The belts should be replaced if they show signs of wear.

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The pump uses centrifugal force to move the coolant the through channels within the engine head and block, and suction to pull coolant through the radiator back into the engine block.

A faulty water pump bearing assembly can cause a growling, rumbling, or whining noise when the engine is running. Left unattended, the water pump may seize up, causing more problems, especially if the water pump is belt-driven. Some newer vehicles however have electric water pumps.

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A car's cooling system can be complex, and many of the components can have similar symptoms. Get your car diagnosed by a professional technician at one of our thousands of repair facilities across the country. Find a shop in your area

In addition to the advantage of a Gen 2 hub assembly, the roll-formed versions of the Gen 2.5 have a factory set pre-load which adds to the ease and reliability of installation.

Wheelbearing

NTN has developed different types of bearings for car manufacturers, depending on the vehicle and the performance requirements. We speak about a generation of bearings, currently called “GEN”.

The advantages of GEN.2: reduction in the number of parts, improved rigidity, increase in accuracy and better adaptation to the operating conditions.

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The car’s heater needs engine coolant to work properly, as warm coolant coming from the engine is routed through the heater core. A low coolant level, caused by a leaking water pump, can result in an inoperative heater. A water pump that isn’t providing proper coolant circulation can also keep the heater from working.

Hub bearings support the weight of the vehicle and allow the tires to turn smoothly. They are extremely important as they have a major impact on safety, as well as ride comfort and fuel efficiency. As the world leader in OEM wheel hub assembly market share, NTN is dedicated to developing bearings in an aim to support the ever changing needs of the OEM’s.

The water pump is lubricated by coolant. If the pump is run dry due to a low coolant level caused by lack of maintenance or from another faulty cooling system component, the shaft seal may get ruined.

Have a mechanic inspect your cooling system. If the water pump is the problem, it should be replaced, along with the water pump mounting gasket or seal. After the new pump is installed, the coolant level should be topped off and the cooling system bled of air. It’s also a good idea to have the thermostat swapped out at the same time, especially if the engine has overheated.