HomeBelts and Cooling > Water Pump and Related ComponentsGMB 120-4050 Engine Water Pump
Part #: 120-4050

GMB 120-4050 Engine Water Pump

⚙️ 14 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ram, 2500 and 3500
🔄Easy Returns — Return within 60 days for a full refund
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Reliable Engine Water Pump for Ram 2500 and 3500

The GMB 120-4050 engine water pump is designed specifically for Ram 2500 and 3500 models, providing efficient cooling system performance. Engineered with durable materials and precise specifications, this water pump supports optimal engine temperature regulation.

  • Pulley Included: Yes, compatible with serpentine belt systems
  • Mounting Hardware Included: 1 o-ring for secure sealing
  • Hub Height: 3.93 inches for proper fitment
  • Impeller Material: Plastic, designed for reverse rotation
  • Water Pump Drive Type: Serpentine belt
  • Gaskets Included: Yes, ensuring leak-free installation
  • Material: Cast iron housing for durability
  • Hub Diameter: 3.23 inches
  • Instructions Included: Yes, for straightforward installation

Durable Construction and Precise Design

This GMB engine water pump features a cast iron housing that offers strength and resistance to wear, suitable for the demanding conditions of Ram 2500 and 3500 trucks. The plastic impeller is engineered to rotate in reverse, matching the original equipment specifications for efficient coolant flow. The included pulley is designed for serpentine belt drive systems, ensuring compatibility with your vehicle's existing setup. With a hub height of 3.93 inches and a hub diameter of 3.23 inches, this pump fits precisely, maintaining proper alignment and function.

Compatible Applications and Common Issues Addressed

This water pump is compatible with Ram 2500 and 3500 models, making it a reliable replacement part for maintaining your truck's cooling system. It is designed to address several common engine cooling problems, including:

  • Overheating due to failing or worn water pump
  • Coolant leaks from damaged seals or gaskets
  • Reduced coolant circulation caused by impeller damage
  • Noise or pulley issues related to water pump wear
  • Engine temperature fluctuations impacting performance

Installation Notes and Tips

Installation of the GMB 120-4050 water pump includes the necessary gasket and o-ring to ensure a proper seal. Follow the included instructions carefully to align the pulley and impeller correctly. Verify that the serpentine belt is properly tensioned after installation to avoid premature wear. It is recommended to inspect the cooling system hoses and thermostat during replacement to ensure overall system reliability.

Quality Assurance and Warranty

GMB manufactures this engine water pump with strict quality control standards to meet OEM specifications. The cast iron construction and precision-molded plastic impeller contribute to long service life. This product includes a warranty that covers defects in materials and workmanship, providing confidence in its durability and performance for Ram 2500 and 3500 vehicles.

BrandGMB
Part Number120-4050
Pulley IncludedYes
Mounting Hardware Included1 o-ring
Hub Height3.93
Impeller MaterialPlastic
Impeller RotationReverse
Includes Back HousingNo
Water Pump Drive TypeSerpentine belt
Gaskets IncludedYes
Hub Diameter (in)3.23
Instructions IncludedYes
MaterialCast iron
Pulley TypeSerpentine belt

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2025Ram25006.7LL6N/A
2025Ram35006.7LL6N/A
2024Ram25006.7LL6N/A
2024Ram35006.7LL6N/A
2023Ram25006.7LL6N/A
2023Ram35006.7LL6N/A
2022Ram25006.7LL6N/A
2022Ram35006.7LL6N/A
2021Ram25006.7LL6N/A
2021Ram35006.7LL6N/A
2020Ram25006.7LL6N/A
2020Ram35006.7LL6N/A
2019Ram25006.7LL6N/A
2019Ram35006.7LL6N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

68445352AA68569196AA

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.