GMB 120-4520 Engine Water Pump

Engine Water Pump for Ram 2500, 3500, 4000

This GMB engine water pump is built to meet or exceed OEM specifications for dependable cooling-system service. It is a new, OEM standard replacement with a cast iron housing, included gasket, included pulley, and an O-ring in the package contents.

• Fits 2013-2018 Ram 2500
• Fits 2013-2018 Ram 3500
• Fits 2013 Ram 4000
• OEM standard replacement for factory-style cooling system service
• Cast iron construction for durable engine cooling support
• Gaskets included for proper sealing at installation
• Pulley included for direct replacement applications

Detailed Product Overview

GMB 120-4520 is an engine water pump for Ram heavy-duty applications, including Ram 2500, Ram 3500, and Ram 4000 models in the listed years. Manufactured to meet or exceed OEM specifications, this water pump is intended for buyers replacing a worn or leaking cooling component with a direct-fit, OE-standard part. The GMB 120-4520 part number is also referenced by 1204520 and 68414058AA for the same application.

Built from cast iron and supplied with a gasket, pulley, and O-ring, this pump supports a factory-style repair where sealing and component alignment matter. If you are searching for a Ram 2500 water pump, Ram 3500 water pump, or Ram 4000 engine water pump replacement, this part provides the core components needed for a standard cooling-system service.

Common Problems This Part Addresses

• Coolant leakage from a worn water pump housing or seal
• Overheating caused by reduced coolant circulation
• Noise from a failing pump bearing or pulley assembly
• Cooling-system service needs on Ram 2500, Ram 3500, and Ram 4000 trucks
• Replacement of an OE-style pump with a new OEM standard unit

Installation Notes and Tips

Verify engine and cooling-system fitment against the vehicle’s original part number before installation. Inspect the mounting surface, hoses, and belt drive components for wear, and replace contaminated coolant as part of the repair. Confirm pulley alignment and gasket seating during installation to help prevent leaks and premature wear.

Quality Assurance

This GMB water pump is manufactured to meet or exceed OEM specifications and is supplied as a new OEM standard replacement part. Its cast iron construction and included sealing components support a professional-grade cooling-system repair for Ram applications.