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Item #:
126587988
3802358 Water Pump For Cummins 5.9 3.9 4B 6B B5.9 ISB Diesel Engines 03-06 Dodge Ram Replaces 3903749
Item #:
126587988
€ 38
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Imported from USA store
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Order now and get it around Wednesday, August 12
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High Quality: Water pumps passed the TS 16949 CERTIFICATE test; designed to function the same as the original.
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What Stands Out
Versatile Compatibility
Designed to work with multiple engine models, ensuring customers can use it across various equipment brands, reducing the need for multiple purchases and simplifying maintenance.
High Durability
Built with robust materials, this water pump withstands tough working conditions, providing long-lasting performance and reliability in the most demanding environments.
Enhanced Efficiency
Optimizes fluid circulation, leading to improved engine performance and cooling, which prolongs engine life and maximizes efficiency for operators looking to boost productivity.
Product Details
| Brand Name | ENTYZE |
| Model Number | MPS |
| Manufacturer Part Number | WP-726 |
| Manufacturer | ENTYZE |
| UPC | 754962285721 |
| Item Type Name | Mechanical Water Pump |
| Included Components | 1* Pump O-ring, 1*Mechanical Water Pump |
| Compatible with Vehicle Type | Truck, Van |
| Automotive Fit Type | Vehicle Specific Fit |
| Material Type | Cast Iron |
| Item Weight | 5.5 Pounds (2.49 kg) |
| Brand | ENTYZE |
| Material | Cast Iron |
| Vehicle Service Type | Truck, Van |
| Number of Items | 1 |
Who Should Buy?
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Commercial Operators
Ideal for businesses using Cummins or Komatsu equipment requiring reliable water pumps for operational efficiency and productivity.
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Farm Equipment Users
Perfect for farmers needing dependable pumps for agricultural machinery like Case IH models, ensuring smooth farming operations.
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Maintenance Technicians
Suitable for technicians who service heavy equipment, offering compatibility with various popular models for effective repairs.
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Casual Users
Not suited for occasional users with limited equipment needs, as they may require simpler or cheaper alternatives.
Product Description
3802358 Water Pump For Cummins 5.9 3.9 4B 6B B5.9 ISB Diesel Engines 03-06 Dodge Ram Replaces 3903749
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What are the compatible engines for the Water Pump for Cummins 4bt3.9/6bt5.9?
Answer: This water pump is specifically designed for Cummins 4bt3.9 and 6bt5.9 engines. It fits perfectly with the following part numbers: 3285410, 3285414, 3286275, 3286277, 3286278, 3800984, 3802348, 3802970, 3802971, and 3903749. When replacing your water pump, ensure compatibility to maintain optimal performance in your diesel engine. This compatibility ensures that your engine receives the proper cooling and enhances its reliability, efficiently managing coolant flow across the engine's components. -
Question:
Why is the seal ring important for the water pump?
Answer: The seal ring is crucial as it ensures a tight seal between the water pump and the engine block. This prevents coolant leaks, which could lead to overheating and serious engine damage. Proper sealing maintains optimal coolant flow and system pressure. Without a reliable seal, you risk a drop in coolant efficiency, potentially resulting in performance issues or engine failure in the long run. Therefore, always check the condition of the seal ring during installation or replacement. -
Question:
How do I install the Water Pump for Cummins 4bt3.9/6bt5.9?
Answer: Installation of the water pump involves several key steps. First, ensure the engine is cool and disconnect the battery. Remove the old pump by detaching the connecting hoses, bolts, and the old seal ring. Clean the mounting surface thoroughly before positioning the new pump with the new seal ring. Connecting hoses and securing bolts appropriately is essential to prevent leaks. Following proper torque specifications is crucial for a successful installation. Always consult your engine's service manual for detailed guidance tailored to your specific model. -
Question:
What materials is the Water Pump for Cummins made from?
Answer: The water pump is commonly made from durable cast aluminum or iron, which ensures longevity and resistance against corrosion and wear. These materials are chosen for their ability to withstand high temperatures and pressures found in diesel engines. The use of high-quality materials contributes to better performance and less frequent replacements over time. In addition, some models may also feature reinforced seals that add to the overall durability of the pump, ensuring efficient operation in rugged conditions. -
Question:
How can I identify a faulty water pump?
Answer: Signs of a faulty water pump include coolant leaks under the engine, unusual noises like grinding or whining, and an overheating engine. If you notice a drop in coolant levels or the temperature gauge rising, it’s advisable to inspect the water pump and its components. Regular checks on performance and a visual inspection for leaks or damage to the pump can help catch issues early. Identifying these symptoms promptly can save on costly repairs and maintain your engine's efficiency. -
Question:
Can I use this water pump for high-performance applications?
Answer: Yes, this water pump can be suitable for high-performance applications, provided it is compatible with your specific Cummins engine modifications. Many users install high-performance water pumps to enhance cooling efficiency, especially in demanding conditions. When utilizing this pump in such environments, ensure you monitor temperatures closely and verify that your engine's cooling system is capable of handling the increased demands. Upgrading other cooling system components might also be necessary for optimal performance. -
Question:
Is it necessary to flush the cooling system when replacing the water pump?
Answer: Yes, flushing the cooling system is recommended when replacing the water pump. This process removes debris and built-up contaminants that may have accumulated in the system, ensuring clear coolant flow. Failing to flush can lead to debris clogging the new pump and radiator, affecting cooling efficiency. A clean system allows the new water pump to function optimally and can prolong the lifespan of not just the pump, but the whole cooling setup in your engine, preventing future issues. -
Question:
Where can I buy Water Pump for Cummins 4bt3.9/6bt5.9 in Ireland?
Answer: You can buy the Water Pump for Cummins 4bt3.9/6bt5.9 at Ubuy in Ireland. Ubuy offers a reliable platform to find this specific pump model equipped with a seal ring, ensuring you receive an authentic product. Their website has a user-friendly interface, making it easy to browse, compare options, and read customer reviews before making a purchase. Ubuy often provides various shipping options and access to customer service if you have any inquiries about your order. -
Question:
What is the average lifespan of a water pump in a Cummins engine?
Answer: The average lifespan of a water pump in a Cummins engine can vary depending on maintenance practices and operating conditions. Generally, a well-maintained water pump can last between 100,000 to 150,000 miles. Regular inspections and timely replacements are key to ensuring longevity. Factors such as the quality of the coolant, operating temperatures, and engine workload can impact the pump's durability. Keeping an eye on the cooling system, flushing it regularly, and replacing worn components can extend the lifespan of your water pump. -
Question:
Does the water pump come with additional parts or accessories?
Answer: Typically, the water pump is sold as a standalone component and may include a seal ring, which is crucial for a proper installation. However, it generally does not include additional accessories like bolts or hoses, which may need to be purchased separately. It's advisable to check with the vendor about what is included in the package. Sometimes, sellers may offer installation kits or other related accessories that can enhance the replacement process and ensure everything is in order for optimum performance.
ENTYZE Water Pumps MPS Editorial Review
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Pros
- High durability and reliability
- Easy to install
- Good performance in various conditions
- Compatible with multiple models
- Includes necessary seal ring
Cons
- Slightly heavier than expected
Platform Trust & Buyer Confidence
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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
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€ 38
Order now and get it around Wednesday, August 12
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Features & Benefits
- High-quality water pump with TS 16949 certification.
- Compatible with a variety of vehicles including CAT, CUMMINS, DODGE, FORD, and Mercedes Benz.
- Replacement parts designed to function like original OEM components.
- Easy installation with included pump belt for convenience.
- Saves time and effort during installation.
- Durable and reliable performance for efficient water pump operation.
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