Parts For Detroit Diesel Series 60 12.7 Ltrs - Engine Water Pump Section

Detroit Diesel Series 60 12.7L Engine – Water Pump & Cooling System Parts Catalog

The Detroit Diesel Series 60 12.7-liter engine remains one of the most legendary heavy-duty diesel engines ever built—famed for its balance of power, durability, and efficiency. Used extensively in highway trucks, buses, and marine applications, this engine’s performance depends heavily on its cooling system. At the center of that system is the freshwater pump , supported by thermostats, hoses, clamps, and seals that keep the coolant circulating efficiently under all load conditions.

This catalog is dedicated to Series 60 12.7L engine water pumps and cooling components , covering both standard and EGR versions , along with all essential supporting hardware for proper installation and maintenance. Whether you’re rebuilding your cooling circuit, replacing worn hoses, or upgrading to a new pump, Diesel Pro Power provides premium-quality Detroit Diesel replacement parts—ready to ship and backed by the trust of over 40,000 satisfied customers worldwide .

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Understanding the Detroit Diesel Series 60 Cooling System

The cooling system in a Series 60 engine is responsible for regulating internal temperatures, preventing overheating, and ensuring optimal combustion efficiency. In both the 12.7L and 14L variants , the system includes:

• Fresh water (coolant) pump – circulates coolant through the engine block and cylinder head.

• Thermostats – regulate the coolant flow based on temperature (available in 180° and 190° options).

• Silicone hoses and clamps – connect the water pump, oil cooler, and radiator, maintaining a sealed coolant circuit.

• Thermostat seals and gaskets – prevent leaks and maintain pressure integrity.

• Coolant bypass systems – allow continuous circulation during warm-up cycles.

Each component in this system plays a vital role in maintaining the legendary reliability and longevity of Detroit Diesel’s Series 60 platform.

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Detroit Diesel Series 60 12.7L Water Pumps

New Detroit Diesel Series 60 Water Pump (Standard)

This newly manufactured water pump is engineered to deliver OEM-level performance for the 12.7L Series 60 engine . Built for long-lasting service in highway and industrial engines, it includes an installation seal for a perfect fit and reliable operation right out of the box.

Key Features:

• Direct replacement for standard Series 60 configurations

• Includes the required installation seal

• Precision-machined impeller and shaft assembly

• New (not remanufactured) construction for extended service life

• Compatible with 12.7L applications in trucks, coaches, and stationary power units

This pump is designed to provide efficient coolant circulation, maintaining optimal operating temperatures under heavy loads, long hauls, or continuous industrial use.

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Detroit Diesel Series 60 EGR Water Pump (12.7L / 14L)

The EGR water pump is specifically designed for EGR-equipped 12.7L and 14L engines . These versions feature a vertical inlet and outlet configuration, distinct from non-EGR setups, to accommodate emission control systems and updated coolant routing.

Key Features:

• Fits EGR 12.7L and 14L Series 60 engines

• Vertical inlet and outlet design for proper fitment

• Includes installation seal

• Brand-new unit, ready for immediate installation

• Built for high-efficiency cooling in emission-compliant engines

Drivers and technicians appreciate the EGR water pump’s precision design—it restores cooling efficiency while withstanding the additional thermal demands of EGR systems found in newer 60 Series engines.

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Water Pump Repair Kit for Detroit Diesel Series 60

For operators seeking to rebuild an existing water pump instead of replacing it, Diesel Pro Power offers a complete water pump repair kit . This kit includes seals, bearings, and other critical components required to restore the pump’s performance.

Why Choose a Repair Kit:

• Cost-effective alternative to full pump replacement

• Includes OEM-grade seals and components

• Extends pump lifespan and restores flow efficiency

• Ideal for fleets and maintenance facilities managing multiple engines

Diesel Pro Power’s repair kit is precision-engineered for Series 60 pumps, ensuring that rebuilt units maintain correct pressure, flow rate, and reliability equivalent to new assemblies.

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Thermostats & Temperature Control Components

Thermostat – 190 Degrees

The 190°F thermostat ensures that the Series 60 engine reaches and maintains proper operating temperature, optimizing combustion efficiency and fuel economy. This temperature setting is typically used for colder climates or applications requiring faster engine warm-up.

Features:

• High-accuracy thermal response

• Reduces engine wear during startup

• Maintains consistent operating temperature

• Suitable for both highway and industrial applications

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Thermostat – 180 Degrees

The 180°F thermostat offers a slightly lower operating range, ideal for warmer environments or heavy-duty applications where maintaining cooler cylinder head temperatures is critical.

Advantages:

• Improved temperature control for high-load or hot-weather conditions

• Prevents overheating in sustained heavy operation

• OEM-grade replacement part for easy fitment

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Thermostat Seal

Every thermostat installation requires a reliable seal to prevent coolant leaks and pressure loss. Diesel Pro Power’s thermostat seal for Series 60 engines ensures a secure fit and long-lasting protection against coolant seepage.

Details:

• Manufactured from heat-resistant rubber compounds

• Compatible with 180° and 190° thermostats

• Designed for a tight, durable seal

Proper sealing not only prevents leaks but also maintains consistent pressure throughout the cooling system—essential for stable water pump performance.

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Silicone Coolant Hoses & Bypass Tubes

Water Bypass Tube Hose for Detroit Diesel Series 60

The bypass tube hose allows limited coolant circulation when the thermostat is closed, aiding engine warm-up and temperature stability. Made of high-temperature silicone, it resists cracking and hardening even under continuous high heat.

Specifications:

• Reinforced silicone construction for durability

• Resistant to oil, ozone, and coolant additives

• Designed specifically for Series 60 engines

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Water Pump to Cooler Hose (2.75" Diameter)

This silicone hose connects the water pump to the cooler, carrying coolant under high pressure. Its 2.75” diameter and 3” length make it a direct-fit component for Detroit Diesel 12.7L and 14L engines.

Highlights:

• Long service life in marine, truck, or industrial use

• Maintains flexibility under heat and vibration

• Meets or exceeds OEM performance standards

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Coolant Hose (3/4" Inside Diameter)

A versatile silicone coolant hose , 3/4” in diameter and one foot long—ideal for auxiliary coolant routing, heater circuits, and custom setups within Series 60 cooling systems.

Advantages:

• High burst pressure capacity

• Temperature resistance beyond 350°F

• Designed for coolant and antifreeze compatibility

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Hose Clamps for Detroit Diesel Series 60 Cooling Systems

Reliable hose connections are essential for preventing coolant leaks and maintaining system pressure. Diesel Pro Power offers a full range of clamps sized for all major Series 60 hoses, ensuring each joint remains secure under thermal expansion and vibration.

Small-Diameter Hose Clamp

Effective Diameter: 9/16" – 1-1/16"
Perfect for smaller coolant and fuel hoses, providing consistent tension and a leak-free seal.

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Mid-Range Coolant Hose Clamps

Diesel Pro’s catalog includes various mid-size clamps designed for radiator, bypass, and cooler connections:

• Clamp Range 13/16" – 1-3/4"
  Ideal for standard cooling lines.

• Clamp Range 11/16" – 1-1/4"
  Designed for smaller bypass and auxiliary connections.

• Clamp Range 1-5/16" – 2-1/4"
  Suited for water pump outlet hoses and mid-sized coolant junctions.

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Large-Diameter Coolant Hose Clamps

Heavy-duty clamps for main radiator and water pump connections:

• Clamp Range 1-9/16" – 2-1/2"
  High-torque design for large silicone hoses.

• Clamp Range 2-5/16" – 3"
  Used for major coolant inlets and outlet pipes.

• Clamp Range 2-7/8" – 3.5"
  The strongest clamp option—engineered for maximum pressure retention.

Each clamp is corrosion-resistant and built to handle constant thermal cycling without loosening, protecting your cooling system against failures that could lead to costly downtime.

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Supporting Components for the Cooling System

Bypass Water Clamp

Each Series 60 bypass hose requires two high-tension clamps for a reliable connection. Diesel Pro Power’s bypass clamps are precision-engineered to provide consistent compression and resistance to loosening.

Details:

• Designed for Series 60 hoses

• Sold individually

• Corrosion-resistant finish

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Temperature Switch

While not part of the primary water pump assembly, the temperature switch works in tandem with thermostats and gauges to trigger warnings or engine protection systems when temperatures exceed safe limits.

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Gauges & Monitoring Equipment

For precise monitoring of engine performance, Diesel Pro Power offers a complete line of mechanical and electrical gauges for Series 60 installations.

Available Options:

• Standard mechanical gauges

• Mechanical gauges with alarm functions

• Electrical gauges for 12V and 24V systems

These gauges help operators track coolant temperature, oil pressure, and other vital parameters—ensuring early detection of cooling issues before they lead to engine damage.

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Maintenance Tips for Series 60 Cooling Systems

To maintain the reliability and performance Detroit Diesel engines are known for, adhere to the following best practices:

1. Inspect and Replace the Water Pump Every 300,000–500,000 Miles:
   Bearings and seals wear over time; replacement ensures consistent coolant flow.

2. Check Thermostat Function:
   A malfunctioning thermostat can cause overheating or inefficient fuel use.

3. Replace Hoses Every 3–5 Years:
   Even high-quality silicone hoses degrade over time due to heat and chemical exposure.

4. Monitor Coolant Levels and Quality:
   Use only approved heavy-duty coolants, and replace them according to manufacturer recommendations.

5. Tighten Clamps and Inspect for Leaks Regularly:
   Preventive inspection avoids unexpected failures.

By following these maintenance steps and sourcing parts from Diesel Pro Power, operators extend engine life, reduce fuel costs, and maintain compliance with emission and performance standards.

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Why Choose Diesel Pro Power for Detroit Diesel Series 60 Cooling Parts

For decades, Diesel Pro Power has been a trusted global source for Detroit Diesel replacement parts. The company offers unmatched service for commercial fleets, marine operators, and industrial users alike.

The Diesel Pro Power Advantage:

• Over 40,000 satisfied customers worldwide

• Fast global shipping with reliable tracking

• Easy-to-navigate online catalog with detailed diagrams

• OEM-equivalent or superior quality parts

• Expert support for selecting correct rotation pumps, EGR compatibility, and coolant fittings

When it comes to maintaining or rebuilding your Detroit Diesel Series 60 12.7L engine, Diesel Pro Power provides every component you need—from complete water pumps and repair kits to hoses, clamps, and gauges—all under one roof.