3638708
Water Pump Seal
Cummins®

The Cummins 3638708 Water Pump Seal is a component designed to ensure the efficient operation of heavy-duty trucks by maintaining the integrity of the engine cooling system. Water pump seals play a role in preventing coolant leaks and ensuring that the cooling system functions correctly, which is important for the overall performance and longevity of the engine.

Basic Concepts of Water Pump Seals

A water pump seal is a mechanical device that prevents coolant from leaking out of the water pump while allowing the pump shaft to rotate freely. It operates by creating a barrier between the rotating shaft and the stationary parts of the pump, thus maintaining system integrity. The seal’s primary function is to keep coolant contained within the cooling system, ensuring that the engine remains at an optimal operating temperature. This, in turn, helps to prevent overheating and potential engine damage ¹.

Purpose of the Cummins 3638708 Water Pump Seal

The Cummins 3638708 Water Pump Seal is specifically engineered to fit Cummins engines, playing a role in the operation of these engines by ensuring that the cooling system remains leak-free. By maintaining a secure seal around the water pump shaft, it contributes to the overall efficiency and reliability of the engine cooling system, helping to maintain consistent engine temperatures under various operating conditions ².

Key Features

The Cummins 3638708 Water Pump Seal is designed with several features that enhance its performance and durability. Constructed from high-quality materials, it is built to withstand the rigors of heavy-duty truck operation. Its design ensures compatibility with Cummins engines, providing a reliable seal that resists wear and tear. The seal’s materials are chosen for their ability to maintain flexibility and resilience under high temperatures and pressures, ensuring long-lasting performance ³.

Benefits

Using the Cummins 3638708 Water Pump Seal offers several advantages. It contributes to improved engine performance by ensuring that the cooling system operates efficiently, which helps to maintain optimal engine temperatures. This can lead to reduced maintenance requirements, as a well-sealed cooling system is less likely to experience leaks or failures. Additionally, the seal enhances the reliability of the engine cooling system, contributing to the overall operation and longevity of heavy-duty trucks ⁴.

Installation Process

Installing the Cummins 3638708 Water Pump Seal requires careful attention to detail to ensure proper fitting and functionality. The process involves removing the old seal, cleaning the sealing surface, and then installing the new seal according to the manufacturer’s instructions. It is important to follow best practices during installation to avoid damage to the seal or the water pump, ensuring that the seal fits correctly and functions as intended.

Troubleshooting and Maintenance

Common issues with water pump seals include leaks, which can be identified by coolant loss or visible signs of leakage around the water pump. Routine maintenance practices, such as regular inspections and replacements as needed, can help prolong the life of the seal and ensure optimal performance. Troubleshooting tips for addressing leaks may include checking for proper installation, ensuring the sealing surface is clean, and verifying that the seal is compatible with the engine.

Manufacturer: Cummins

Cummins Inc. is a leading manufacturer in the automotive industry, known for its commitment to quality and innovation. With a history of producing reliable and high-performance engines and components, Cummins has established a reputation for excellence. The company offers a wide range of products and services designed specifically for heavy-duty trucks, demonstrating its expertise and dedication to meeting the needs of its customers.

Water Pump Seal Part 3638708 Compatibility with Cummins Engines

The Water Pump Seal part number 3638708, manufactured by Cummins, is designed to fit a variety of Cummins engines. This seal is crucial for maintaining the integrity of the water pump system, ensuring that coolant remains within the engine’s cooling system. Here is a detailed look at the compatibility of this seal with various Cummins engines:

K50 Series

• K50
• QSK50 CM2150 K107
• QSK50 CM2150 MCRS
• QSK50 CM2350 K108

The K50 series engines, including the QSK50 CM2150 K107, QSK50 CM2150 MCRS, and QSK50 CM2350 K108, are designed for heavy-duty applications. The Water Pump Seal part 3638708 fits these engines by providing a reliable seal at the water pump interface, preventing coolant leaks and ensuring optimal engine performance.

KTA38 Series

• KTA38GC CM558

The KTA38GC CM558 engine is another model where the Water Pump Seal part 3638708 is applicable. This seal is engineered to fit seamlessly with the water pump of the KTA38GC CM558, ensuring that the engine’s cooling system operates efficiently.

QSK38 Series

• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS

The QSK38 series engines, including the QSK38 CM2150 MCRS and QSK38 CM850 MCRS, benefit from the Water Pump Seal part 3638708. This seal is designed to fit these engines, providing a critical barrier against coolant leaks and maintaining the engine’s cooling efficiency.

QSK60 Series

• QSK60 CM850 MCRS

The QSK60 CM850 MCRS engine is another model where the Water Pump Seal part 3638708 is compatible. This seal ensures that the water pump operates without leaks, contributing to the overall reliability and performance of the engine.

QSK95 Series

• QSK95 CM2350 K111
• QSK95 CM2350 K113

The QSK95 series engines, including the QSK95 CM2350 K111 and QSK95 CM2350 K113, are also compatible with the Water Pump Seal part 3638708. This seal is designed to fit these engines, providing a reliable seal that prevents coolant leaks and ensures the engine’s cooling system functions effectively.

Role of Part 3638708 Water Pump Seal in Engine Systems

The part 3638708 Water Pump Seal is a component in maintaining the integrity and efficiency of various engine systems. When integrated with base parts, this seal ensures that the water pump operates without leaks, thereby preserving the structural integrity of the engine’s cooling system.

In conjunction with the water pump, the seal plays a role in preventing coolant leakage. This is important for consistent coolant flow, which is necessary for regulating engine temperature and preventing overheating. The seal’s proper function allows the water pump to circulate coolant effectively through the engine block and cylinder head, ensuring optimal thermal management.

When part of a water pump kit, the 3638708 Water Pump Seal contributes to the overall reliability of the kit. It ensures that all components within the kit work seamlessly together, providing a comprehensive solution for engine cooling system maintenance. The seal’s integration into the kit facilitates easier installation and replacement, reducing the likelihood of future leaks and extending the lifespan of the water pump and associated components.

Conclusion

The Cummins 3638708 Water Pump Seal is a critical component for maintaining the efficiency and reliability of heavy-duty truck engines. Its role in preventing coolant leaks and ensuring optimal engine temperatures contributes to the overall performance and longevity of the engine. Proper installation, regular maintenance, and understanding its compatibility with various Cummins engines are essential for maximizing the benefits of this part.