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Datsun Water Pump & Related

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Water Pump & Related

Datsun Water Pump & Related

What is a Water Pump and where is it Located?

One of the key components of the automotive cooling system is the engine water pump, sometimes referred to as the coolant pump as well. It serves a crucial role in keeping your engine from overheating by circulating the coolant through the engine and radiator. The process of coolant circulation is what pulls heat away from the engine and allows it to maintain the correct proper operating temperature. In terms of location, automotive water pumps are usually mounted to the front of the engine, and often behind the timing cover.

The majority of vehicles have basic centrifugal (mechanical) water pumps consisting of a main shaft, housing and impeller. Attached to the mechanical water pump’s main shaft is a pulley or gear, which is driven by the rotation of the crankshaft either by an accessory belt, timing belt or chain depending on the application. On the other end of the main shaft lies the impeller; cooled coolant from the radiator enters near the center via an inlet and is forced outwards as it spins, circulating the coolant through the engine. From there, the coolant goes around the engine’s cylinders and as it does, it picks up the heat from the friction and burning of fuel, thus transferring it from the engine to the coolant. The warm fluid is then forced out and travels through the upper radiator hose and into the automobile’s radiator via the water outlet. From there it goes into small chambers that are all throughout the radiator, where it is then cooled down by the air that is passed freely through the radiator’s core by the radiator fan. Air passes through the radiator when the vehicle is moving as well, but the use of cooling fans aids this process when the engine is being worked harder, and / or when the car or truck isn't moving. The cooled coolant then goes back to the water pump via the lower radiator hose and the process repeats itself. 

A few vehicles also have a secondary (or auxiliary) electric water pump to assist in the circulation process, in addition the mechanical water pump. Other forced induction automobiles that are equipped with a water-to-air intercooler also require the use of an electric water pump.

Water Pump Failure

Water pumps can last a fairly long time on vehicles with properly maintained coolant systems. Changing your car or truck’s coolant in regularly scheduled intervals will go a long way in preventing failure of any coolant system components. So how do you know if your water pump needs to be replaced? An early sign would be what is known as the “weep hole drip,” which refers to a small amount of coolant leaking from the water pump onto the ground. There are two very small passages on the water pump bearing housing - an upper and a lower – and these are known as weep holes. Normally, a seal prevents coolant from leaking through the lower hole; however, this seal can fail due to age or coolant contamination.  This type of leak is also a sign the main shaft bearings may be on their way to failure. If you have noticed signs of coolant leakage under your vehicle or a loss of coolant, it is time to inspect your car or truck’s water pump as this may be an indicator that it has failed.

Other possible auto water pump failures can be due to a cracked housing, broken impeller or main shaft. Failures of these matters may also directly or indirectly result in severe engine damage. These types of failures are often preceded by early warning signs such as a coolant leak or bearing noise, proving the importance of regular maintenance.

Replacing a Water Pump

As mentioned, automotive water pumps are usually mounted to the front of the engine of a car or truck, and often behind the timing cover. For this reason, it is wise and cost effective to replace your water pump as preventative maintenance the same time you perform a timing belt or chain replacement. Performing a water pump replacement can be done by your average do-it-yourselfer on most vehicles, providing they have a good set of hand tools and basic mechanical ability. As always, a decent repair manual for your automobile will take you through the entire process.

Need a Water Pump Replacement?

If the water pump fails, the engine will overheat causing it to shut down, which can possibly lead to more serious problems as well as cause considerable damage to the engine. So, if the water pump in your car or truck has failed, it is important that you replace it as soon as possible. Luckily for you, 1A Auto has you covered! We have quality, aftermarket water pump replacements, both mechanical and electric, for many cars, trucks, SUVs and vans, at great prices. For a durable and dependable auto water pump replacement that will last you 2-3 times longer on average than your used OEM automotive radiator, buy from 1A Auto today.

At 1A Auto, we also make shopping for an aftermarket water pump replacement for your car, truck, SUV or van easy - we're here to help you select the right one for your vehicle! Call our customer service toll free at 888-844-3393 if you have any questions about our products, warranty, compatibility or to purchase, or you can buy online with the utmost confidence. Replace your broken or leaking water pump now with an exact fit aftermarket replacement part from 1A Auto.


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For more than 50 years, the Green family has been installing and using the same high quality auto parts that you'll find on our website. We actually use the parts we sell, and we've been selling online since 1999. Our company's mission is to make your car projects go smoothly, and to become your trusted source for auto parts. To this end, we treat our customers like family.

We employ USA based, knowledgeable support technicians. They'll help you through your project. We always make sure you get the right part. And we boast the industry's most generous returns policy. You won't find a company more passionate about auto parts than 1A Auto.
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