HomeGMB 120-4520 Engine Water Pump
Part #: 120-4520

GMB 120-4520 Engine Water Pump

⚙️ 13 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, 3500, and 4000
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Reliable Engine Water Pump for Ram 2500, 3500, and 4000

The GMB 120-4520 engine water pump is designed to maintain optimal engine temperature for Ram 2500, 3500, and 4000 models. Built with durable cast iron and including essential components like a pulley and gasket, this new water pump ensures consistent cooling system performance.

Key Features of the GMB 120-4520 Water Pump

  • Constructed from cast iron for enhanced durability and heat resistance
  • Includes a pulley for direct replacement and ease of installation
  • Comes with a gasket and one o-ring to ensure a secure, leak-free fit
  • Meets OEM standard item grade for reliable performance
  • Brand: GMB, part number 120-4520, designed specifically for Ram trucks

Detailed Product Description

This GMB engine water pump (part number 120-4520) is engineered to meet OEM standards, providing a dependable cooling solution for Ram 2500, 3500, and 4000 vehicles. The cast iron construction offers strength and resistance to wear, which is critical for maintaining engine temperature under demanding conditions. The included pulley allows for straightforward replacement without the need for additional parts. Additionally, the package contains a gasket and an o-ring to ensure a tight seal, preventing coolant leaks and maintaining system integrity.

Common Applications and Problem Solving

  • Replaces faulty or leaking water pumps in Ram 2500, 3500, and 4000 models
  • Addresses engine overheating issues caused by pump failure
  • Eliminates coolant leaks due to worn or damaged seals
  • Restores proper coolant circulation for engine efficiency
  • Prevents potential engine damage from inadequate cooling

Installation Notes and Tips

When installing the GMB 120-4520 water pump on Ram 2500, 3500, or 4000 trucks, ensure the engine is cool before beginning work. Replace the old gasket and o-ring with the included new components to avoid leaks. Verify pulley alignment and belt tension after installation to maintain proper operation. Follow manufacturer torque specifications for mounting bolts to prevent damage.

Quality Assurance and Warranty

The GMB 120-4520 water pump is a new, OEM standard grade part designed to meet or exceed factory specifications. Manufactured with high-quality cast iron and tested for durability, this water pump supports reliable engine cooling performance. Warranty details are provided by GMB and typically cover defects in materials and workmanship under normal use.

BrandGMB
Part Number120-4520
Gaskets IncludedYes
Item GradeOem standard
MaterialCast iron
Package Contents1 o-ring
Product ConditionNew
Pulley IncludedYes

This part fits 13 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2018Ram25006.7LL6DIESELN/A
2018Ram35006.7LL6DIESELN/A
2017Ram25006.7LL6DIESELN/A
2017Ram35006.7LL6DIESELN/A
2016Ram25006.7LL6DIESELN/A
2016Ram35006.7LL6DIESELN/A
2015Ram25006.7LL6DIESELN/A
2015Ram35006.7LL6DIESELN/A
2014Ram25006.7LL6DIESELN/A
2014Ram35006.7LL6DIESELN/A
2013Ram25006.7LL6DIESELN/A
2013Ram35006.7LL6DIESELN/A
2013Ram40006.7LL6DIESELN/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:

12045204213368414058AAAW6739CP6739T2303US99WP1167A

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