Cummins 6BTA Fresh Water Pump and Cooling System Components

The Cummins 6BTA is a high-performance diesel engine trusted in marine and industrial environments around the world. At the heart of its thermal management system is the fresh water pump—a critical component responsible for circulating coolant throughout the engine to maintain optimal temperatures and prevent overheating.

This catalog focuses exclusively on the Cummins 6BTA engine water pump system and associated components that support proper coolant flow, temperature control, and long-term system integrity. Diesel Pro Power offers a complete set of high-quality replacements for fresh water pumps, thermostats, seals, hoses, belts, clamps, and related cooling system parts.

Engine Water Pump for Cummins 6BTA

The primary component in the cooling system is the engine-mounted fresh water pump. Diesel Pro Power supplies water pumps compatible with a wide range of CPLs, making them ideal for marine, generator, and stationary applications. These fresh water pumps are built with cast metal housings, durable impellers, and sealed bearings to ensure long service life even in high-load conditions.

Compatible CPLs

This water pump supports numerous configurations, including CPL numbers: 1975, 2122, 8266, 8306, 2893, 2063, 2292, 1889, 2071, 1948, 8444, 8236, 2891, 1288, 2372, 2243, 599, 2530, 714, 1962, 1519, 8208, 2014, 1523, 2373, 1524, 8217, 2686, 8304, 2208, 8239, 2377, 1525, 1522, 8039, 2109, 2264, 2246, 2302, 2351, 1967, 1268, 741, 591, 2486, 721, 594, and 1965.

These pumps meet OEM specifications and provide a direct-fit solution for your Cummins 6BTA engine.

Water Pump Seal and Housing Components

Every fresh water pump installation should include a new water pan seal ring to prevent coolant leaks. Diesel Pro Power offers:

• Water Pump Seal Ring – Ensures a leak-proof fit between the pump and engine block

• Thermostat Housing Gasket – Replaces the seal at the thermostat cover to maintain coolant pressure integrity

• Thermostat Seal – Works with both standard and marine thermostats to prevent leaks around the valve housing

These high-temperature seals and gaskets are essential to any cooling system service.

Thermostats for 6BTA Engines

To maintain consistent engine temperature, Diesel Pro Power offers multiple Cummins-compatible thermostats:

• 165°F Thermostat – Ideal for cooler marine environments or engines under lighter loads

• 180°F Thermostat – Standard option for most industrial and marine applications

Thermostats open and close at specific temperatures, directing coolant flow to the heat exchanger or radiator. Replacing the thermostat during pump service ensures optimal regulation of engine temperature.

Fan and Accessory Drive Belts

Drive belts transfer energy from the crankshaft to the water pump, alternator, and engine fan. We offer multiple ribbed serpentine belts compatible with Cummins 6BTA engines in varying lengths to match specific configurations:

• Belt lengths ranging from 53.50" to 69.0"

• 8-rib, serpentine V-belt designs for high surface area and grip

• Ideal for driving the water pump, alternator, and engine cooling fan

Always replace belts during water pump service to ensure smooth operation and avoid failures under load.

Belt Tensioners

A functioning belt tensioner keeps proper tension on the serpentine belt, preventing slippage and belt wear. Our belt tensioners:

• Feature plain pulley types

• Are designed to fit Cummins 4B, 6BT, 6BTA, ISB, and QSB engine models

• Provide consistent tension across the entire belt cycle

A failing tensioner can lead to reduced water pump output or complete belt detachment, compromising engine cooling.

Coolant Filters and Temperature Switches

Additional components available to support the 6BTA cooling system include:

• Coolant Filter – Removes impurities from coolant, extending the life of your water pump and preventing scale buildup

• Temperature Switch – Designed to trigger cooling fans or warning indicators when coolant reaches 205°F. Thread size is 1/2 NPT.

These supporting components enhance long-term cooling efficiency and provide system alerts before failures occur.

Silicone Coolant Hoses

Silicone coolant hoses are essential for connecting the fresh water pump, thermostat housing, radiator, and heat exchanger. Diesel Pro Power offers high-grade silicone hoses in various diameters:

• Inside diameters from 3/4" to 4"

• High flexibility and resistance to collapse under pressure

• Suitable for marine and industrial applications

• Available by the foot for custom installations

Silicone hoses resist high temperatures, ozone, and coolant chemical breakdown better than rubber alternatives.

Hose Clamps

To secure silicone hoses to pump outlets and fittings, a range of clamps is available:

• Multiple clamp sizes for diameters from 9/16" to 3.5"

• Stainless steel construction for corrosion resistance

• High-pressure rating to ensure no coolant leaks under load

Proper hose clamping prevents coolant loss and keeps the cooling system pressurized.

Radiator Cleaner

To finish off a cooling system service, Diesel Pro Power recommends using radiator cleaner to flush contaminants:

• Removes scale, rust, and deposits from heat exchangers and coolant passages

• Compatible with Cummins 6BTA marine and land-based cooling circuits

• Promotes optimal coolant flow after pump replacement

Always flush and refill the coolant system after installing a new water pump to ensure clean operation.

Mechanical and Electric Gauges

Monitoring coolant temperature is essential. Diesel Pro Power offers:

• Mechanical gauges with alarms

• Electrical gauges for 12V and 24V systems

These gauges provide early warning of overheating and allow for real-time monitoring of your 6BTA cooling performance.

Final Notes on Installation and Maintenance

To ensure successful water pump service on the Cummins 6BTA:

• Always use new gaskets, seals, and clamps

• Flush the coolant system thoroughly

• Replace the thermostat as part of the service

• Inspect and replace worn belts and tensioners

• Monitor temperature with a reliable gauge or switch

Diesel Pro Power supports thousands of customers worldwide with fast shipping, top-tier customer service, and expert product knowledge. All our Cummins 6BTA cooling system parts are engineered for durability and backed by our commitment to quality.