5 Best Water Pump for 5.9 Cummins Engine Reviews & Guide

Last Updated on November 15, 2021 by Bonnie C. Welling

If you are looking for the best water pump for 5.9 Cummins engine, you’ll no doubt find it a herculin task with a high volume of water pumps available in the market.

However, you should not compromise with an ordinary one to save some extra bucks. Rather, keep looking for the excellence finding the perfect one for your 5.9 Cummins engine.

A water pump is a way crucial for the performance of the engine – be it a truck or car. It functions to boost the performance of the engine by pumping coolant around the engine block, radiator, and hoses.

A Comparison Table – Top 5 Water Pump For 5.9 Cummins Engine

Top 5 Best Water Pump For 5.9 Cummins Engine

Finding a well-matched engine for the Cummins is not rocket science, believe me. Here, we are going to review the top 8 best water pump for 5.9 Cummins. In addition, the review will be summed up with an expert buying guide.



Rareelectrical New Cummins 6B Water Pump is our first choice for a 5.9 Cummins engine. The best thing about this unit is that the Rareelectrical New Cummins 6B Water Pump is compatible with Dodge, Cat, and Ford trucks 5.9l engines along with Cummins.

Coming with the steel cast impeller blades, this unit falls in the standard OEM quality water pump class. In addition, we find it affordable in comparison to its features. Besides, the pump is highly reliable. The only limitation is that the unit is made for 6B motors and the 1989-1998 series.

Key Features

  • OEM style impeller
  • Cast iron casing
  • impeller blades

Gates 43034 Water Pump

Gates 43034 Water Pump

Gates 43034 Water Pump is another premium quality water pump for a 5.9 Cummins engine. Coming with the metal impeller, it protects the blades from premature breakage and producing noise that helps to keep the engine good.

Gates 43034 Water Pump is engineered with professionalism that stands for high performance and durability. Integrating with all essential components, which include O-ring and others. It also comes with a gasket and a tube for the heater hose.

Gates 43526 Water Pump

Gates 43526 Water Pump

We got another water pump for 5.9 Cummins engine from the make of Gates. Coming with all essential utility, this unit won our hearts. It is a highly reliable water pump when it comes to the replacement of a 5.9 Cummins water pump.

It also provides an O ring. When it comes to swapping, it is compatible with the 2006 Dodge Ram 2500 5.9 turbo diesel. The construction of the pump is solid, and the fins are made of metal with no wobble in the bearing.

Key Features

  • Comes with a rubber gasket
  • Easy to install

Airtex AW6158 Engine Water Pump

Airtex AW6158 Engine Water Pump

Airtex is a renowned brand name in the water pump manufacturing industry. They stand for safety and wild performance. If you’re looking for a water pump for a 5.9 Cummins engine, the AW6158 Engine Water Pump can be your best pick. This pump is amazing for belt-driven application.

This unit comes with all required gaskets and seals, making the installation easier and faster. On top of that, featuring a secure housing and precisely-machined mounting surface, Airtex extends the convenience and performance.

Key Features

  • Renowned Brand
  • Includes gaskets and seals

OAW CR3072 Engine Water Pump

OAW CR3072 Engine Water Pump

OAW CR3072 Engine Water Pump is the last bite in the best water pump for a 5.9 Cummins engine. It is designed with OE (original equipment specification), complying with all professional and safety standards.

It applies John Crane carbon graphite ceramic seals that ensure perfect sealing. With proper installation, this water pump can keep the engine cool for optimum performance. In addition, this unit is compatible with GMB 120-3072 and Airtex AW7145

Key Features

  • Designed with OE specification
  • Carbon graphite ceramic seals

Buying Guide for the best water pump for 5.9 Cummins engine

As you have already gone through several reviews above, you should have learned the essential features of the best water pump for a 5.9 Cummins engine. If you decide to pick your water pump from what we recommend above, your job is done.

However, learning about the essential features of a water pump will make you confident to end up with the best one or to suggest to your neighbors which one is best for him/her.

This buying guide is prepared to educate you with the essential features of the best water pump that you’ll purchase for the Cummins engine.


If you know a little bit about the role of bearing in the water pump – be it for Cummins engine or anything else, you can guess how crucial the bearing is for the performance of a water pump. To explain further, a bearing can help you avoid tragedies, for instance, water pump failure.

You’ll notice a leak in the water pump if the bearing starts malfunctioning. In that case, there will be a noticeable change in the sound produced by the bearing. That practically tells you that you should bring a change shortly. Therefore, you must pick a water pump that comes with a sound bearing.

Weep Holes

These days, most of the water pumps come with weep holes. They are brilliantly multi-tasking water pumps. If you like to purchase a water pump for your Cummins engine with weep holes, you have to keep some factors in consideration.

Some weep holes tend to have leaks at the bottom. If this happens to you with your water pump, you’ll experience tragedy someday. Hence, make sure the weep holes are free from any leak at the bottom.

Bearing Seal

Bearing seal is another crucial factor to be highly serious when you invest money for the water pump. It holds a significant share of importance. The water pump is likely to be exposed to contamination by the course of use. The bearing seal makes sense when your water pump needs to keep safe from any sort of contamination.

Impeller Blades

Impellers blades are pretty fragile which tend to break down in heavy pressure if not durable enough. It is more of a newly-experienced issue that is seen in the case of plastic-made impeller blades.

If the blades break, you’ll notice a vibration sourcing from the pump housing. Consequently, the broken blade can lead the engine to fail by overheating the engine. So, consider the quality of the blades during purchasing.

Frequently Asked Questions


Q: Can I drive my car with a bad water pump?

Answer: Running a car or a truck with a bad water pump creates no problem as soon as you start driving. It means that it will take time to succumb to any damage. So, you should not do so. At least, you shouldn’t keep driving for a long time. If there is no alternative, then you can drive as soon as you can fix the issue. Otherwise, it’ll lead to severe problems in the long run.

Q: What Causes Rough Idle?

Answer: A bad water pump is one of the major reasons why rough idle happens. Such problem originates from the coolant overflow, overheating, or even from the gasket leak. So, make sure there is no leak in the gasket and the pump is perfectly functioning.

Q: Can A Bad Water Pump Cause No Heat?

Answer: A bad water pump can cause several issues leading to pump malfunction and total damage. Overheating is simply one o them making the pump sensitive for the car or truck. Check the water pump before starting the vehicle if possible.

Easiest Way to Replace Water Pump

Summing Up

Considering the importance of the water pump, purchasing the best water pump for 5.9 Cummins engine has no alternative. No worry, we’re leaving you with our recommended list of water pumps which we prepared for Cummins engine.

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