Water Pump Inlet O-Ring Cummins 4059172 | 3680294, 121315, M-4059172, FP-4059172

High-Performance Water Pump Inlet O-Ring Seal for Cummins Engines

The Cummins 4059172 O-ring seal is a critical component designed to maintain a secure, leak-free connection in your engine’s cooling system. Specifically engineered for the water pump inlet, this seal prevents coolant loss, ensuring your heavy-duty engine operates at optimal temperatures. This part is also available under the numbers: 3680294, 121315, and M-4059172.

Constructed from premium elastomeric materials, this O-ring is built to withstand the extreme temperatures, high pressures, and chemical exposure typical of heavy-duty diesel environments. It is primarily used on Cummins ISX15 and QSX15 engines (including EPA13 15-liter automotive applications), as well as various industrial and trailer-mounted generator sets. Replacing a worn or degraded seal during routine maintenance prevents costly coolant leaks and protects your engine from overheating.

Key Features & Benefits

• Optimal Sealing Performance: Engineered to precise dimensions to guarantee a perfect fit, form, and function, preventing coolant bypass.
• Extreme Temperature Resistance: Made from high-grade materials that resist degradation under intense engine heat and thermal cycling.
• Broad Compatibility: Fits Cummins ISX 15 and QSX 15 engines, commonly found in commercial trucks and industrial power generation equipment.
• Durable Construction: Designed to endure harsh cooling system environments, reducing maintenance intervals and downtime.

Applications & Fitment

This water pump inlet O-ring seal is compatible with the following applications:

• Cummins ISX15 / QSX15 (15-Liter Engines)
• EPA13 Automotive Engines
• Industrial Generator Sets
• Trailer-Mounted Generator Sets

Cross-Reference / Interchange Part Numbers

This part replaces / is interchangeable with the following part numbers:

• 4059172
• 3680294
• 121315
• M-4059172
• FP-4059172
• A4059172