Best Water Pump for 5.9 Cummins

A 5.9 Cumminstruck engine has gained fame in the automotive industry for its high power, superb durability, and undoubtedly the ability to withstand heavy-duty workloads.

True that Cummins 5.9 is one of the best pick-up truck engines; still, it can’t deliver adequate performance without the best water pump installation. Cummins water pump is engineered to drive the fluid from the radiator and pass it through the entire engine, thus ensuring a balance on temperature.

Today we’re here to familiarize you with some of the market-valued water pumps for 5.9 Cummins and how you can pick a suitable product among those thousands of opportunities.

What’s the Best Cummins Water Pump?

Getting all essential features in one Cummins water pump is entirely tricky, but one with an exceptional attribute could help anyone. Thus, we’ve made a summarized chart to give you accurate information about which Cummins pump is suitable for which kind of applications. If you’ve got a tight schedule or need to make a quick choice, please read through this section included all products with one unique application.

Comparison Table Of Water Pump 5.9 Cummins

Before moving on to the detailed review about the best water pump for 5.9 Cummins, let’s look at some of the desired features of these Cummins water pumps offer. This comparison table is included to help you gain an initial concept about our selected products.

Sl. NoProductBest ForFeature 1Feature 2
1.Gates 45005 Water   PumpBest For Boosting Bearing LifeDesign with combined or formed seal to ensure utmost bearing lifeThe shafts and hub are made of quality components with good tolerance to withstand heavy working pressure.
2.ACDelco 252-711 ProfessionalWater PumpBest For Maintaining TemperatureSeals are precisely formed to offer superior performanceCompatible with GM and almost all Non-GM vehicles
3.Gates 43526 Water   PumpBest For Hybrid ApplicationsMade of high strength steel and iron for long-time usabilityFive superior quality blades for constant fluid flow
4.ACDelco 252-845 Professional Water Pump KitBest For ConsistencyOE certified pump designed to suit gm and non-gm vehiclesWell-designed bearings for proper coolant system
5.IRONTREE AW7163 Water PumpBest For Heavy ApplicationsBuilt to offer a close fit in Dodge RAM, Jeep, and Chrysler AspenExcellent performance with long-lasting usability

7 Best Water Pump For 5.9 Cummins Reviews

The included eight best 5.9l Cumminswater pumps have been thoroughly appraised, and each has gained individual recognition based on its overall performance. Let’s move to our detailed review without further delay!

1. Best For Boosting Bearing Life: Gates 45005 Water Pump

Technical Features:

  • Weight: 4 ounces
  • Overall Dimensions: 16.2 x 13.3 x 7.6 inches
  • Color: Grey
  • Build Material: Cast Aluminum
  • Housing: Stamped Steel

Gates is one of the most remarkable manufacturers in the automobile industry. Significantly, they’ve gained recognition for their water pumps, which come in exceptional quality and have acquired a lot of customer satisfaction.

Gates 45005is one of their incredible addition designed to boost your CumminsISBengine performance. This Cummins water pump is built with cast aluminum to provide a long-term service no matter the situation is.

This water pump is designed to hold out against heavy workload from fan clutches or belt tension with its unitized shaft assembly. Plus, the product comes in a combined seal, ensuring a leak-free ultimate performance life.

As an additional advantage, it offers computerized surfaces to ensure a proper seal. Luckily, Gates 45005 uses high-quality cast aluminum without flashing for maximum fluid travel. Thanks to its well-designed impeller, it will enhance water flow and improve bearing life. You can get a quick and convenient installation as it features tight or no-sealant gaskets.

Durability and performance are two essential points that can describe this model very well. This Cummins water pump has been tested thoroughly and acclaimed as a suitable water pump for Cummins 5.9L ISBengines. Thus, anyone looking for a super quality, no remanufactured, and aftermarket water pump can deploy this excellent device to their 5.9l Cummins engine.


  • Hassle-free operation with no maintenance complexity
  • Smooth and noise-free function
  • Design with combined or formed seal to ensure utmost bearing life
  • The shafts and hub are made of quality components with good tolerance to withstand heavy working pressure
  • Available at an affordable cost


  • Due to delivery issues, it’s better to check the product before starting the project

2. Best For Maintaining Temperature: ACDelco 252-711 Professional Water Pump

Technical Features:

  • Weight:4.34 pounds
  • Overall Dimensions: 11.4 x 8.1 x 7.5 inches
  • Color: Grey
  • Build Material: Cast Iron
  • Housing: Grey Iron

For those people who’re looking for a reliable water pump replacement for 5.9 Cummins, the ACDelco 252-711 Water Pump has come to please them with all its incredible qualities. Not only is it compatible with a GM vehicle, but it’s also a perfect replacement part for a non-GM vehicle.

This OEMwater pump has been tested by experts and recommended as a qualified hydraulic ram based on its anti-leak performance.There’s no need to concern about longevity as this product is built of cast iron housing with coated seal to provide you long-time support.

With its precise coolant leak-proof system, it maintains proper temperature through the entire engine system. So, whenever your engine faces high-temperature, it can perfectly control the increased temperature as it features heat-treated shafts.

The additional benefit is that it’s available at a reasonable price. So, you might think that this may not be a good quality pump, but incredibly it’s a superior yet affordable water pump. The product is OEM certified, meaning all the gears packaged are entirely original.

This feature makes it a perfect choice for professionals. It includes seals, O-ring gasket to give you an effortless installation. You can stay confident of durability and seal support if you pick this 5.9 water pump!


  • Cast iron housing with precise seals offers superior performance
  • The shaft assembly ensures extended sustainability
  • Excellent temperature control system
  • Continuous fluid flow with smooth function
  • Compatible with GM and almost all Non-GM vehicles


  • The coolant needs to clean before installation

3. Best For Hybrid Applications: Gates 43526 Water Pump

Technical Features:

  • Weight: 4 pounds
  • Overall Dimensions:5.25×9.12×5.75 inches
  • Color: Bronze
  • Build Material: Stamped Steel
  • Housing: Cast Iron

Who doesn’t want to get a smooth and healthy engine life? In this case, an ideal water pump plays an outstanding role as it represents your engine performance. Without accurate liquid flow across the radiator and the entire engine working area, you might face sudden overheat, which can cause engine failure.

If this happens, you need to change your original hydraulic ram as soon as possible to prevent your vehicle damage. Gates43526 Water Pump is designed in China, giving you a consistent performance along with substantial service life.

This product comes in a broad range of compatibility. Like, it’s a quick replacement for FMI Automotive Components, NAPA, Murray Temperature Control CP6158, Chrysler5086959AB, 5086959AA, RAM, and much more. Whether you want to improve motor efficiency or increase service life, these water inject replacement components can help you get all advantages through an easy installation process.

Since it’s made of stamped steel and iron, this OEM-tested 5.9l Cummins pump is durable enough to endure cumbersome works. Besides these benefits, it has been tested for leakage and recommended as an anti-leak water pump with a total crack-free area.

The stamped steel-made impeller with cast iron housing ensures optimum coolant flow so that you can stay confident with its performance. With its unitized and accurate protection seal, the blades can rotate in full force and keep the whole process secured at the same time. Considering all these features, we think that this could be an excellent aftermarket water pump for your 5.9 Cummins!


  • Made of high strength steel and iron for long-time usability
  • Fit almost all Cummins till 2009
  • Convenient and quick installing procedure
  • Five superior quality blades for continuous fluid flow
  • Efficient and profitable market replacement


  • No bolts are included in the package

4.  Best For Consistency: 252-845 Water Pump

Technical Features:

  • Weight: 3.1 pounds
  • Overall Dimensions: 18.3 x 12.3 x 9.1 inches
  • Color: Silver
  • Build Material: Cast Iron and Aluminum
  • Housing: Aluminum

As a result of long-time usage, the original water pump may lose its efficiency,  replacing it with a new one. However, anyone should remind that it must need superior replacement pumps as your engine potency depends on the type of water pump you’ll use.

The ACDelcobrand comes with its 252-845 model, a perfect combination of accuracy and consistency. ThisOE-testedCummins water pump from renowned manufacturers is made to fit appropriately in 5.9 Cummins. As it has been appraised for leakage, so you can undoubtedly rely on it.

While some conventional water pumps only fit GM motors, this offers a vast range of compatibility to suit GM and most Non-GM automobiles. The seals are precisely coated for seal long life. In a complete package, you will get O-ring, seals, and gaskets. These kinds of stuff are included to free you from fatigue while doing the installation.

If you’re the owner of Dodge Ram2500 Cumminsand looking for atop-quality inject replacement, this water pump can be a marvelous addition. Like other ACDelco models, it also has bearing assemblies for the proper circulation of cooling water.

Furthermore, these bearings are persistently sealed to offer you extended engine service. Thanks to its flat wall area and smooth fluid circulation, it maintains a systemic operation. This package of the water pump can merely give you the best versions of your engine!


  • OEMwater pump designed to suit gm and non-gm vehicles
  • Ensure convenience and hassle-free assemble
  • Cast body design to meet various vehicles applications
  • Well-designed bearings for proper coolant system
  • It works with 100% seal support


  • The build quality needs to be upgraded

5. Best For Heavy Applications: IRONTREE AW7163 Water Pump

Technical Features:

  • Weight:4.79 pounds
  • Overall Dimensions:8.9 x 8.8 x 5.3 inches
  • Color: Silver
  • Build Material: Aluminum
  • Housing: Stamped Steel

All you need to improve your vehicle’s drivability is to enhance engine performance. And this will be only possible when you place a qualified water pump for your engine.

Whether you decide to get a replacement part for your Jeep, Dodge, RAM, or Chrysler Aspen, this OEM-approved IRONTREE 5.9 Cumminswater pump has come in handy to fulfill all your requirements. Thanks to its light construction, you can move this inject conveniently while fixing it. However, it doesn’t prove its weak build. This one combines steel and iron, ensuring long-lasting functionality.

After installing these water pumps, you can stay assured as it offers leakage-free better service life. It will boost primary gear parts to provide you the best Cummins engine life. With its steel-built housing, this product can stand against rough applications.

Not only that, but it also features appropriate bearings for prolonged life. The well-made impellers are here to maintain the water flow with optimum force. This fact can’t avoid if you expect top performance from your truck.

When it comes to installation, it includes all necessary accessories to give you a hassle-free replacement. Surprisingly, manufacturers provide the best 5.9 Cumminswater pumps at a relatively budget-friendly price for their valuable customers.

Besides, they offer a limited three-year gear replacement or repair guarantee. This 5.9 Cummins water pump can give you a smooth experience even on laborious applications!


  • Uninterrupted liquid flow
  • Built to offer a close fit in Dodge RAM, Jeep, and Chrysler Aspen
  • Include gaskets and other tools for easy operation
  • Excellent performance with long-lasting usability
  • It keeps the entire engine system calm for extended service


  • It doesn’t come with bolts.

6. Best For Value: ACDelco 252-813 Water Pump

Technical Features:

  • Weight: 3.2 pounds
  • Overall Dimensions: 6.4 x 5.1 x 6.1 inches
  • Color: Silver, Black, and blue
  • Build Material: Aluminum
  • Housing: Steel

Do you love to go on a long drive or a racing enthusiast? Are you facing engine problems in the middle of your journey? Then the ACDelco 252-813 Water Pump could be a solution to your hardship. When it comes to improving your5.9 Cummins engine efficiency, it can’t be possible without proper coolant flow.

That is why the the252-813 water pumps come to deliver you a healthy engine service with enhanced performance.These pumps are available at a reasonable price yet made of high-end materials.  

Thus, they could be a good option for anyone who is looking for a reliable pump replacement. This Cumminspump is manufactured to meet the requirements of both GM and Non-GM vehicles. Also, it’s a good choice for professionals for its overall performance.

The best part of this injection is its coolant features. This Cummins water pump circulates the cool water from the radiator and the entire engine surface to control operating temperature and boost engine performance. This feature is a primary fact why dedicated users prefer to make it as their constant buddy.

The excellent quality bearings are a plus point as it helps to prolong its service life. In other words, well-formed bearing assemblies ensure the utmost performance. This nifty 5.9 Cummins water pump allows you to place the installation process conveniently.


  • It guarantees long-lasting service
  • The pump uses shafts to control excess heat
  • Steel built body with coated seals for superior functionality
  • Require less time to assemble
  • High-end blades to provide a good service without damages


  • The bolts need to purchase separately

7. Best For Continual Coolant Flow: AW5103 Water Pump

Best For Continual Coolant Flow

Technical Features:

  • Weight: 1.99 pounds
  • Overall Dimensions: 6.65 x 5.43 x 4.37 inches
  • Color: Silver
  • Build Material: Aluminum
  • Housing: Stamped Steel

Using a suitable water pump is a must-have item if you want to upgrade your engine’s potency. When your inject cooling system works perfectly, it will help you get a smooth driving experience simultaneously. The IRONTREE AW5103 Water Pump is designed with drive belts and blades, offering you continuous fluid flow with full force.

Ensure a proper fitment for Cadillac, RAM, GMC, Chevrolet, Saturn, Saab, and Buick. This water pump is heavily built for lasting performance thanks to its 100% leakage-free design. With stamped steel housing material, this water pump can endure heavy pressure with no damages.

Each water pump is manufactured to balance the engine cooling process in a normal running state and offer ultimate fluid passage and longevity. Install this innovative device in 5.9 CumminsISB if you’re looking for an ideal way for uninterrupted fluid circulation.


  • Design to compatible with a lot of road vehicles
  • Precise bearing assemblies for better operation
  • Gaskets and other installation accessories are included
  • Noise-free and smooth functionality
  • Come with three years product replacement warranty


  • ·The user manual doesn’t include, and it would be better to double-check OEM part number

Key Considerations

Although most water pumps are designed for all-rounder features, some are detailed with highlights for unique jobs.

However, we’ve assembled some crucial points that you need to figure out before purchasing a 5.9 Cummins water pump. Guarantee your picked model satisfies your expected criteria and, most importantly, can provide excellent functionality for a long time.

1. Leak-proof Operation

When purchasing a pump for your 5.9 Cummins, you need to make sure it’s appropriately leak-proof. Most water pumps have been tested multiple times until it gets leak-free approbation.

Placing a water pump with a proper seal can help extend pump life, resulting in a healthy engine. On the contrary, an inferior quality inject can leak easily, diminishing your vehicle’s performance.

2. Bearing life

If you want to reduce the possibilities of fire accidents and inject failure, you should check the quality of bearings before purchasing. Due to bearings failure, you will face grinding or squeaking-like noise, which is much annoying. It can also cause leakage in your water pump.

As bearings play a significant role in circulating cooling water from the radiator cap through the entire engine surface, this feature should be considered.

3. Impeller design

The kind of impeller is used in Cummins water pump can be open, semi-closed, or closed. Usually, smaller pumps are designed with open impellers, offering quick operation and easy maintenance. If your liquid flow contains solids, semi-closed could be a good option.

However, it gradually loses its efficiency over time. And closed impellers are the best options for the larger pumps, though it’s tough to clean. Purchasing a Cummins water pump with a well-designed impeller ensures maximum liquid flow while maintaining inject protection without any damages.

4. Blade Count

The efficiency of a water pump depends on how many blades the cast impeller contains. The higher the number of impeller blades, the more fluid circulation with a high level of speed. In other words, increased engine efficiency with a continuous cooling procedure.

5. Installation

You may require separate car components like fan clutches or radiator caps while installing some tricky water pumps. But who wants to take extra effort when a few brands offer you a straightforward installation process?

You only need to replace the old pumps with the new ones, an easy and effortless operation. Luckily, some manufacturers provide a complete package with all necessary tools like gaskets, O-ring, seal, and bolts.

6. Build quality

Generally, Cummins water pumps use steel and aluminum for construction. If you need one for heavy applications, going for steel built with coated water pump seal could be a superb choice.

Some conventional models come with plastic housing materials, so it’s better to check the impeller and pump housing building materials before making a quick purchase.

Frequently Asked Questions (FAQs)

1. What is the process of replacing Cummins water pump?

If you’ve wondered about how you complete the replacing process, nothing to worry about, as the entire replacement is utterly convenient and effortless. For your convenience, we’ve added some easy steps-

  • First, you need to lose the serpentine drive belt. All you pull the cables to lose the tension and then make it slip off the old pump.
  • After that, drain the cooling system. Lose the bolts and gaskets and clean those properly.
  • Install new pump with gasket, O-rings, and bolts, which have given you the package.
  • Assemble the O-ring inside your water pump and place everything in order. Ensure all the cables and tubes are free from grease and oils.

2. How can you realize the failure of your Cummins pump?

Some usual symptoms that help you understand the failure of your Cummins.

  •  If your Cummins engine is getting heat quickly after long-time driving or even at startup, it can result in a severe water pump breakdown.
  • Water leakage is another symptom of this failure. You might experience annoying sounds like whining or growling due to water pump failure.
  • The bearings failure, contamination, sludge accumulation, damaged shafts, weep holes are some signs of your Cummins pump damage.
  • Corrosion or the formation of cavities inside your water pump can create a critical mechanical fuss. Even a water pump is installed loosely can cause severe mechanical hassle.

Summary & Top Pick

Finding a suitable water pump replacement for Cummins 5.9 is challenging as several good options are available in the marketplace. To help you make a stress-free and quick decision, we’ve come up with the eight best water pumps for a 5.9 Cummins engine that are well-designated to one particular feature.

Though all our chosen products are compatible to deliver incredible service, we would like to suggest Gates 43526 Water Pump as the most applaudable pick for its diverse array of features. This device is an exceptional one that can help you get a taste of perfection, also smooth steering.

Anyway, it depends on you which one can meet your expectation level. Keep in mind to do simple research on all the features before making a move. 

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