Oil Coolers For Cummins Marine & Industrial Engines

When operating a marine engine in demanding conditions, maintaining a safe oil temperature is vital to ensure reliable performance and long-term engine health. A Cummins oil cooler plays a critical role in regulating oil temperatures by transferring excess heat away from the engine’s lubricating oil. This not only prevents thermal breakdown of the oil but also protects bearings, pistons, and critical components from premature wear.

At Diesel Pro Power, we carry an extensive inventory of Cummins oil cooler replacements designed specifically for marine applications. Whether you're running a compact QSB or a heavy-duty KTA50, our oil coolers are built for durability, corrosion resistance, and optimal heat dissipation.

Why Diesel Pro Power is the Leading Source for Cummins Oil Coolers

Fast Shipping and Global Availability

We understand the urgency of marine maintenance. That’s why:

• Orders ship within 24 hours

• We offer worldwide shipping with door-to-door service

• Tariffs, duties, and taxes can be included at checkout for international customers

• Each part is backed by a full 1-year warranty

When you choose Diesel Pro Power, you’re choosing speed, reliability, and transparency.

Built for Marine Environments

Our Cummins oil coolers are constructed from marine-grade materials like copper, copper-nickel, and aluminum alloys. These materials are specifically chosen for their resistance to saltwater corrosion and long-term durability. We offer tube bundle and stacked plate designs, so you can find the right match for your engine’s cooling configuration.

Oil Coolers & Related Components by Cummins Engine Model

Explore our catalog of Cummins marine oil coolers, available for a wide range of engine models. Each listing includes a short summary of marine application and cooling needs.

Oil Coolers & Related Components for Cummins 4B

Compact 4-cylinder engine commonly used in auxiliary marine systems; requires a durable oil cooler for low-speed, steady operation.

• Oil Pump for Cummins 4B
• Oil Cooler for Cummins 4B
• Oil Pan Gasket for Cummins 4B
• Oil Cooler Core Gasket for Cummins 4B
• Filter Head Gasket for Cummins 4B
• Oil Filter for Cummins 4B
• Oil Filter Removal Wrench for Cummins engines
• Zinc for Cummins 4B Marine Engine Fuel and Oil Coolers
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins 4BT

Turbocharged variant of the 4B, used in support vessels and workboats; benefits from efficient oil cooling under moderate boost.

• Oil Pump for Cummins 4BT
• Oil Cooler for Cummins 4BT
• Oil Pan Gasket for Cummins 4BT
• Oil Cooler Core Gasket for Cummins 4BT
• Filter Head Gasket for Cummins 4BT
• Oil Filter for Cummins 4BT
• Oil Filter Removal Wrench for Cummins engines
• Zinc for Cummins 4BT Marine Engine Fuel and Oil Coolers
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins 4BTA

Aftercooled version of the 4BT designed for higher-performance marine roles; requires robust heat exchange for oil temperature stability.

• Oil Pump for Cummins 4BTA
• Oil Cooler for Cummins 4BTA
• Oil Pan Gasket for Cummins 4BTA
• Oil Cooler Core Gasket for Cummins 4BTA
• Filter Head Gasket for Cummins 4BTA
• Oil Filter for Cummins 4BTA
• Oil Filter Removal Wrench for Cummins engines
• Zinc for Cummins 4BTA Marine Engine Fuel and Oil Coolers
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins 6B

Naturally aspirated 6-cylinder engine with straightforward cooling needs for light-duty marine service.

• Oil Pump for Cummins 6B
• Oil Cooler for Cummins 6B
• Oil Pan Gasket for Cummins 6B
• Oil Cooler Core Gasket for Cummins 6B
• Filter Head Gasket for Cummins 6B
• Oil Filter for Cummins 6B
• Oil Filter Removal Wrench for Cummins engines
• Zinc for Cummins 6B Marine Engine Fuel and Oil Coolers
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins 6BT

A turbocharged workhorse; oil cooler helps manage elevated temperatures under higher RPMs and heavier marine loads.

• Oil Pump for Cummins 6BT
• Oil Cooler for Cummins 6BT
• Oil Pan Gasket for Cummins 6BT
• Oil Cooler Core Gasket for Cummins 6BT
• Filter Head Gasket for Cummins 6BT
• Oil Filter for Cummins 6BT
• Oil Filter Removal Wrench for Cummins engines
• Zinc for Cummins 6BT Marine Engine Fuel and Oil Coolers
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins 6BTA

Aftercooled design increases thermal stress, making a high-efficiency oil cooler essential for reliable performance.

• Oil Pump for Cummins 6BTA
• Oil Cooler for Cummins 6BTA
• Oil Pan Gasket for Cummins 6BTA
• Oil Cooler Core Gasket for Cummins 6BTA
• Filter Head Gasket for Cummins 6BTA
• Oil Filter for Cummins 6BTA
• Oil Filter Removal Wrench for Cummins engines
• Zinc for Cummins 6BTA Marine Engine Fuel and Oil Coolers
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins ISB 4.5

• Oil Pump for Cummins ISB 4.5
• Oil Cooler for Cummins ISB 4.5
• Gasket for the oil cooler cover for Cummins ISB 4.5
• Oil Cooler Core Gasket for Cummins ISB 4.5
• Filter Head Gasket for Cummins ISB 4.5
• Oil Filter for Cummins ISB 4.5
• Oil Filter Removal Wrench for Cummins engines
• Fuel & Oil Pressure Switch for Cummins engines

Oil Coolers & Related Components for Cummins ISB 5.9

• Oil Pump for Cummins ISB 5.9

• Oil Cooler for Cummins ISB 5.9

• Oil Pan Gasket for Cummins ISB 5.9

• Gasket for the Oil Cooler Cover for Cummins ISB 5.9

• Oil Cooler Core Gasket for Cummins ISB 5.9

• Filter Head Gasket for Cummins ISB 5.9

• Oil Filter for Cummins ISB 5.9

• Oil Filter Removal Wrench for Cummins ISB 5.9

• Fuel & Oil Pressure Switch for Cummins ISB 5.9

Oil Coolers & Related Components for Cummins ISB 6.7

• Oil Pump for Cummins ISB 6.7

• Oil Cooler for Cummins ISB 6.7

• Oil Pan Gasket for Cummins ISB 6.7

• Gasket for the Oil Cooler Cover for Cummins ISB 6.7

• Oil Cooler Core Gasket for Cummins ISB 6.7

• Filter Head Gasket for Cummins ISB 6.7

• Oil Filter for Cummins ISB 6.7

• Oil Filter Removal Wrench for Cummins ISB 6.7

• Fuel & Oil Pressure Switch for Cummins ISB 6.7

Electronic fuel-injected engine used in advanced marine systems; oil cooler maintains stability under modern emissions systems.

Oil Coolers & Related Components for Cummins QSB 4.5

Smaller displacement model often found in generator sets and compact propulsion; depends on efficient oil cooling for reliability.

• Oil Pump for Cummins QSB 4.5

• Oil Cooler for Cummins QSB 4.5

• Gasket for the Oil Cooler Cover for Cummins QSB 4.5

• Oil Cooler Core Gasket for Cummins QSB 4.5

• Oil Filter for Cummins QSB 4.5

• Oil Filter Removal Wrench for Cummins QSB 4.5

• Fuel & Oil Pressure Switch for Cummins QSB 4.5

Oil Coolers & Related Components for Cummins QSB 5.9

Mid-range marine engine with turbocharging; requires an oil cooler to protect high-performance internals from heat stress.

• Oil Pump for Cummins QSB 5.9

• Oil Cooler for Cummins QSB 5.9

• Gasket for the Oil Cooler Cover for Cummins QSB 5.9

• Oil Cooler Core Gasket for Cummins QSB 5.9

• Oil Filter for Cummins QSB 5.9

• Oil Filter Removal Wrench for Cummins QSB 5.9

• Fuel & Oil Pressure Switch for Cummins QSB 5.9

• Oil Pan Gasket for Cummins QSB 5.9

• Lower Gasket Set for Cummins QSB 5.9

• Zinc for Cummins QSB 5.9 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins QSB 6.7

Used in commercial vessels, this engine’s emission and boost systems demand steady oil temperatures via a premium cooler.

• Oil Pump for Cummins QSB 6.7

• Oil Cooler for Cummins QSB 6.7

• Gasket for the Oil Cooler Cover for Cummins QSB 6.7

• Oil Cooler Core Gasket for Cummins QSB 6.7

• Oil Filter for Cummins QSB 6.7

• Oil Filter Removal Wrench for Cummins QSB 6.7

• Fuel & Oil Pressure Switch for Cummins QSB 6.7

• Oil Pan Gasket for Cummins QSB 6.7

• Lower Gasket Set for Cummins QSB 6.7

• Zinc for Cummins QSB 6.7 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins QSB 7

High-output 6-cylinder engine; marine configurations rely on effective oil cooling during extended operating hours.

• Oil Pump for Cummins QSB 7.0

• Oil Cooler for Cummins QSB 7.0

• Gasket for the Oil Cooler Cover for Cummins QSB 7.0

• Oil Cooler Core Gasket for Cummins QSB 7.0

• Oil Filter for Cummins QSB 7.0

• Oil Filter Removal Wrench for Cummins QSB 7.0

• Fuel & Oil Pressure Switch for Cummins QSB 7.0

• Oil Pan Gasket for Cummins QSB 7.0

• Lower Gasket Set for Cummins QSB 7.0

• Zinc for Cummins QSB 7.0 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins 6C

A mechanical mid-size engine known for simplicity and durability; benefits from traditional tube-bundle oil cooler designs.

• Oil Pump for Cummins 6C
• Oil Cooler for Cummins 6C
• Oil Filter for Cummins 6C
• Oil Filter Removal Wrench for Cummins 6C
• Fuel & Oil Pressure Switch for Cummins 6C
• Screw for Oil Pump for Cummins 6C
• Oil Cooler Cover Gasket for Cummins 6C
• Oil Cooler Gasket for Cummins 6C
• Rear Cover Gasket for Cummins 6C
• Zinc for Cummins 6C Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins 6CT

Turbocharged for marine propulsion or support, the 6CT needs reliable oil cooling under variable loads.

• Oil Pump for Cummins 6CT

• Oil Cooler for Cummins 6CT

• Oil Filter for Cummins 6CT

• Oil Filter Removal Wrench for Cummins 6CT

• Fuel & Oil Pressure Switch for Cummins 6CT

• Screw for Oil Pump for Cummins 6CT

• Oil Cooler Cover Gasket for Cummins 6CT

• Oil Cooler Gasket for Cummins 6CT

• Rear Cover Gasket for Cummins 6CT

• Zinc for Cummins 6CT Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins 6CTA

Aftercooled configuration adds heat demand; upgraded oil cooler ensures smooth performance and longer oil life.

• Oil Pump for Cummins 6CTA

• Oil Cooler for Cummins 6CTA

• Oil Filter for Cummins 6CTA

• Oil Filter Removal Wrench for Cummins 6CTA

• Fuel & Oil Pressure Switch for Cummins 6CTA

• Screw for Oil Pump for Cummins 6CTA

• Oil Cooler Cover Gasket for Cummins 6CTA

• Oil Cooler Gasket for Cummins 6CTA

• Rear Cover Gasket for Cummins 6CTA

• Zinc for Cummins 6CTA Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins ISC

Electronically controlled engine used in marine and industrial platforms; cooling system supports high-efficiency operation.

• Oil Pump for Cummins ISC

• Oil Cooler for Cummins ISC

• Oil Filter for Cummins ISC

• Oil Filter Removal Wrench for Cummins ISC

• Fuel & Oil Pressure Switch for Cummins ISC

• Screw for Oil Pump for Cummins ISC

• Oil Cooler Cover Gasket for Cummins ISC

• Rear Cover Gasket for Cummins ISC

Oil Coolers & Related Components for Cummins QSC

A popular 8.3L marine engine; oil cooler is critical for temperature control during long-distance runs or high-output duty.

• Oil Pump for Cummins QSC

• Oil Cooler for Cummins QSC

• Oil Filter for Cummins QSC

• Oil Filter Removal Wrench for Cummins QSC

• Fuel & Oil Pressure Switch for Cummins QSC

• Screw for Oil Pump for Cummins QSC

• Oil Cooler Cover Gasket for Cummins QSC

• Rear Cover Gasket for Cummins QSC

• Zinc for Cummins QSC Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins ISL

Powerful inline-6 engine used in boats and work vessels; requires durable oil cooling to protect against heat-induced wear.

• Oil Pump for Cummins ISL

• Oil Cooler for Cummins ISL

• Oil Filter for Cummins ISL

• Oil Filter Removal Wrench for Cummins ISL

• Fuel & Oil Pressure Switch for Cummins ISL

• Screw for Oil Pump for Cummins ISL

• Oil Cooler Cover Gasket for Cummins ISL

• Rear Cover Gasket for Cummins ISL

• Oil Pan Gasket for Cummins ISL

• Oil Suction Connection Gasket for Cummins ISL

Oil Coolers & Related Components for Cummins QSL

The QSL delivers strong performance in marine settings; oil coolers are essential to maintain proper oil viscosity and pressure.

• Oil Pump for Cummins QSL

• Oil Cooler for Cummins QSL

• Oil Filter for Cummins QSL

• Oil Filter Removal Wrench for Cummins QSL

• Fuel & Oil Pressure Switch for Cummins QSL

• Screw for Oil Pump for Cummins QSL

• Oil Cooler Cover Gasket for Cummins QSL

• Rear Cover Gasket for Cummins QSL

• Oil Pan Gasket for Cummins QSL

• Oil Suction Connection Gasket for Cummins QSL

Oil Coolers & Related Components for Cummins M11

Reliable mid-size marine engine used in propulsion and auxiliary roles; depends on steady oil cooling for consistent output.

• Oil Pump for Cummins M11

• Oil Cooler for Cummins M11

• Oil Filter for Cummins M11

• Oil Filter Removal Wrench for Cummins M11

• Fuel & Oil Pressure Switch for Cummins M11

• Oil Cooler Gasket for Cummins M11

• Seal for Oil Cooler for Cummins M11

• Head Hole Gasket for Cummins M11

• Oil Pan Gasket for Cummins M11

Oil Coolers & Related Components for Cummins ISM

Electronic control and emissions systems increase heat; robust oil cooling ensures optimal operating conditions.

• Oil Pump for Cummins ISM

• Oil Cooler for Cummins ISM

• Oil Filter for Cummins ISM

• Oil Filter Removal Wrench for Cummins ISM

• Fuel & Oil Pressure Switch for Cummins ISM

• Oil Cooler Gasket for Cummins ISM

• Seal for Oil Cooler for Cummins ISM

• Head Hole Gasket for Cummins ISM

• Oil Pan Gasket for Cummins ISM

Oil Coolers & Related Components for Cummins QSM11

A high-demand marine engine; uses advanced oil cooler designs to support extended use in commercial environments.

• Oil Pump for Cummins QSM11

• Oil Cooler for Cummins QSM11

• Oil Filter for Cummins QSM11

• Oil Filter Removal Wrench for Cummins QSM11

• Fuel & Oil Pressure Switch for Cummins QSM11

• Oil Cooler Gasket for Cummins QSM11

• Seal for Oil Cooler for Cummins QSM11

• Head Hole Gasket for Cummins QSM11

• Oil Pan Gasket for Cummins QSM11

• Zinc for Cummins QSM11 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins KTA19

Found in tugs and heavy-duty vessels; oil cooler ensures the large-displacement engine handles marine stress efficiently.

• Oil Pump for Cummins KTA19

• Oil Cooler for Cummins KTA19

• Oil Pan Adaptor Gasket for Cummins KTA19

• Torque Converter Cooler Housing Gasket for Cummins KTA19

• Gasket for Oil Cooler Housing for Cummins KTA19

• Oil Cooler Cover Gasket for Cummins KTA19

• Oil Cooler O-ring for Cummins KTA19

• Head Hole Cover Gasket for Cummins KTA19

• Oil Filter for Cummins KTA19

• Oil Filter Removal Wrench for Cummins KTA19

• Fuel & Oil Pressure Switch for Cummins KTA19

• Zinc for Cummins KTA19 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins KTA38

Used in dredges, ferries, and supply ships; requires a heavy-duty oil cooler to support its V12 configuration.

• Oil Cooler for Cummins KTA38

• Oil Pan Adaptor Gasket for Cummins KTA38

• Oil Pan Gasket for Cummins KTA38

• Lock-nut for the Oil Cooler for Cummins KTA38

• Oil Cooler Mounting Gasket for Cummins KTA38

• Gear Cover Gasket for Cummins KTA38

• Oil Cooler Cover Gasket for Cummins KTA38

• Oil Cooler O-ring for Cummins KTA38

• Oil Filter for Cummins KTA38

• Oil Filter Removal Wrench for Cummins KTA38

• Fuel & Oil Pressure Switch for Cummins KTA38

• Zinc for Cummins KTA38 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins KTA50

Massive marine diesel engine with critical cooling needs; high-capacity oil cooler is required for safe operation under load.

• Oil Cooler for Cummins KTA50

• Oil Pan Adaptor Gasket for Cummins KTA50

• Oil Pan Gasket for Cummins KTA50

• Lock-nut for the Oil Cooler for Cummins KTA50

• Oil Cooler Mounting Gasket for Cummins KTA50

• Gear Cover Gasket for Cummins KTA50

• Oil Cooler Cover Gasket for Cummins KTA50

• Oil Cooler O-ring for Cummins KTA50

• Oil Filter for Cummins KTA50

• Oil Filter Removal Wrench for Cummins KTA50

• Fuel & Oil Pressure Switch for Cummins KTA50

• Zinc for Cummins KTA50 Marine Engine Fuel and Oil Coolers

Oil Coolers & Related Components for Cummins QSK19

Electronic and emissions-regulated engine with high performance demands; advanced oil cooler supports durability and power.

• Oil Cooler for Cummins QSK19

• Oil Pan Adaptor Gasket for Cummins QSK19

• Torque Converter Cooler Housing Gasket for Cummins QSK19

• Gasket for Oil Cooler Housing for Cummins QSK19

• Oil Cooler Cover Gasket for Cummins QSK19

• Oil Cooler O-ring for Cummins QSK19

• Head Hole Cover Gasket for Cummins QSK19

• Lower Gasket Set for Cummins QSK19

• Oil Filter for Cummins QSK19

• Oil Filter Removal Wrench for Cummins QSK19

• Fuel & Oil Pressure Switch for Cummins QSK19

• Zinc for Cummins QSK19 Marine Engine Fuel and Oil Coolers

One-Stop Shop for Marine Lubrication and Cooling

In addition to Cummins oil coolers, we carry a full range of related lubrication and cooling system parts, including:

• Oil filters

• Oil pumps

• Gaskets and seals

• Oil pressure switches

• Thermostats and sensors

• Overhaul kits

• Marine-grade engine paint

Whether you're replacing a single part or performing a complete engine overhaul, Diesel Pro Power has all your maintenance essentials in one place.

Knowledgeable Experts. Unmatched Support.

Need help identifying the correct oil cooler or verifying fitment? Our expert team is just a phone call away:

• Call 1-888-433-4735 (USA)

• Call 305-545-5588 (International)

Our trained professionals will walk you through your order and ensure you're getting the exact part you need—first time, every time.

Easy to Shop, Fast to Ship

Our website is built with your convenience in mind:

• Search by engine model or serial number

• Choose from multiple secure payment methods

• Know your full price upfront—no hidden fees

• Orders typically ship within one business day

At Diesel Pro Power, we make it easy to get the Cummins oil coolers and marine engine parts you need—quickly and confidently.

Frequently Asked Questions About Cummins Oil Coolers

1. What does a Cummins oil cooler do?

A Cummins oil cooler reduces the temperature of engine oil by transferring heat to raw water or coolant. This helps prevent overheating, protects engine components from thermal damage, and ensures the oil maintains its lubricating properties during extended operation.

2. How can I tell if my Cummins oil cooler is failing?

Common signs include oil and coolant mixing, engine overheating, oil pressure fluctuations, and visible corrosion or leaks around the cooler. If you notice any of these symptoms, it may be time to replace the oil cooler.

3. Are your Cummins oil coolers designed for marine use?

Yes, all our Cummins oil coolers are built specifically for marine applications. They are constructed from corrosion-resistant materials such as copper-nickel and aluminum alloys, and are compatible with raw water or closed-loop cooling systems.

4. Do you offer oil coolers for every Cummins engine model?

We carry oil coolers for a wide range of Cummins engines, including the B Series, C Series, ISX, QSB, QSK, KTA, M11, QSM11, and more. You can browse by engine model or contact our support team to confirm compatibility.

5. What’s the difference between a tube bundle and a stacked plate oil cooler?

Tube bundle coolers circulate water through a series of metal tubes surrounded by oil, while stacked plate coolers pass oil and water through alternating metal plates. Both are effective, but stacked plate coolers typically offer higher thermal efficiency in compact spaces.

6. Can I replace my Cummins oil cooler myself?

If you're an experienced marine diesel technician or mechanic, you may be able to replace the cooler yourself. However, installation complexity varies by engine model. We recommend consulting your service manual or working with a qualified technician.

7. How quickly do you ship Cummins oil coolers?

We ship most orders within 24 hours, Monday through Friday. Our large warehouse ensures we keep most oil coolers in stock and ready to ship—so you get your part fast, wherever you are in the world.

8. Do your oil coolers come with a warranty?

Yes. Every Cummins oil cooler we sell comes with a 1-year warranty covering manufacturer defects. You can purchase with confidence knowing your investment is protected.

9. Do I need to replace any other parts when I replace the oil cooler?

It’s a good idea to inspect or replace oil hoses, gaskets, thermostats, pressure sensors, and oil filters when replacing the cooler. A fresh set of components ensures better performance and reduces the risk of leaks or pressure issues.

10. Can your team help me find the right oil cooler for my engine?

Absolutely. Our team of marine diesel experts is available by phone or email. Just provide your engine model or serial number, and we’ll help you select the correct oil cooler and any related components you may need.