Cummins 4BT Engine Parts - Oil Pump Section

Oil System Components for the Cummins 4BT Engine

The Cummins 4BT engine is widely known for its durability, simplicity, and longevity. To keep your 4BT running at its best, one of the most critical systems to maintain is the engine’s lubrication system—centered around a properly functioning oil pump, high-performance oil cooler, durable gaskets, and a reliable oil filter. At Diesel Pro Power, we offer a complete lineup of Cummins 4BT oil system components that meet or exceed OEM performance standards.

Our oil pumps, gaskets, filters, and accessories are specifically designed for the Cummins 4BT platform, not generic aftermarket fits. With more than 40,000 satisfied customers worldwide, Diesel Pro Power is the trusted choice for parts that last.

Cummins 4BT Oil Pumps – Rear vs. Front Gear Train Applications

The 4BT’s oil pump plays a vital role in maintaining oil pressure throughout the engine, ensuring that vital components like crankshafts, camshafts, pistons, and turbochargers receive the lubrication they need for safe and efficient operation. Not all 4BT oil pumps are the same—gear train location is the primary differentiating factor.

Rear Gear Train Oil Pump

For Cummins 4BT engines with a rear gear train, we offer an oil pump with 23/24 helical gear teeth. Helical gears are engineered for smoother, quieter operation and excellent oil flow stability under load. This oil pump is built for reliability in tough operating environments, such as marine propulsion or industrial machinery.

Key Compatibility:

• Rear gear train configuration

• CPL Numbers: 8239, 2377, 1525, 8039, 2109, 2264, 2246, 2302, 2351, 1967, 1268, 741, 594, 1965

Product Highlights:

• 23/24 helix teeth for quieter, more efficient operation

• Heavy-duty construction for long life

• Exact fit for rear gear train 4BT engines

Front Gear Train Oil Pump

For Cummins 4BT engines equipped with a front gear train, a different oil pump is required. This version uses 22/24 straight-cut gear teeth for direct, rugged power transmission. These pumps are perfect for engines requiring straightforward installation and high-flow performance.

Key Compatibility:

• Front gear train configuration

• CPL Numbers: 0742, 8206

Product Highlights:

• 22/24 straight gear teeth for robust performance

• Specifically engineered for front gear 4BT configurations

• Long-lasting, OEM-quality construction

Oil Cooler for Cummins 4BT

High engine temperatures can degrade oil quickly, leading to premature wear and engine failure. That’s why the Cummins 4BT oil cooler is essential, especially in marine and industrial environments where load demands and heat buildup are constant.

5-Plate Oil Cooler Assembly

Our 5-plate oil cooler for the Cummins 4BT efficiently dissipates heat from the circulating oil, extending the life of your engine and ensuring steady oil viscosity and pressure under heavy operating conditions.

Features:

• Durable 5-plate configuration for effective cooling

• Direct bolt-on fit for 4BT engines

• Protects oil integrity during continuous high-load operation

• Ideal for marine engines and stationary power units

Gaskets for the Cummins 4BT Oil System

Every time you service or replace an oil system component, it’s essential to install fresh gaskets to ensure leak-free operation. Diesel Pro Power stocks all of the primary Cummins 4BT oil system gaskets for maintenance, rebuilds, and upgrades.

Oil Pan Gasket

A fresh oil pan gasket provides a tight, lasting seal to prevent leaks at the base of the 4BT engine block. Built from oil- and heat-resistant materials, our gasket is ideal for complete rebuilds or simple maintenance jobs.

Oil Cooler Core Gasket

The oil cooler core gasket creates a vital seal between the oil cooler and the block, preventing oil and coolant from mixing—a serious concern in marine or industrial 4BT engines where both systems work under pressure.

Oil Filter Head Gasket

Designed to seal the connection between the oil filter head and the engine block, this gasket is vital for maintaining consistent oil pressure and preventing bypass leaks. Proper sealing ensures your oil filter does its job without obstruction.

Cummins 4BT Oil Filter

No oil system is complete without a high-efficiency filter. The Cummins 4BT oil filter we carry is a spin-on design that captures contaminants while maintaining optimal flow rates and pressure. This is crucial for maintaining clean oil and extending the life of internal engine components.

Oil Filter Specs:

• Outside Diameter: 3.66"

• Height: 5.35"

• Thread Size: 1-16 UN

• Designed for high-durability spin-on application

Benefits:

• Captures sludge, carbon, and metal shavings

• Maintains steady oil pressure and flow

• Easy installation for 4BT owners and techs

Oil Filter Removal Tool for Cummins 4BT

Removing a stuck oil filter on a 4BT engine can be frustrating—especially in tight compartments like marine engine bays. Diesel Pro Power offers a precision oil filter wrench that fits diameters from 4-21/32 inches to 5-5/32 inches, making it perfect for Cummins 4BT spin-on filters.

Key Features:

• Heavy-duty grip for stubborn filters

• Designed for Cummins, Detroit Diesel, and Caterpillar filters

• Prevents damage to filter housing during removal

Zinc Anode for 4BT Oil Coolers (Marine Use)

If you're running a marine version of the Cummins 4BT, protecting your cooling and oil systems from corrosion is essential. We offer zinc anodes designed to fit into the oil cooler or fuel cooler system to guard against galvanic corrosion in saltwater environments.

Specs:

• Brass Plug: NPT 3/8"

• Zinc Length: 1 inch

• Compatible with most 4BT marine oil coolers

Oil Pressure Switches for Cummins 4BT

Monitoring oil pressure in real time is critical—especially in high-risk applications like marine engines or industrial gensets. Diesel Pro Power stocks a full range of oil pressure switches for the Cummins 4BT, including models with make/break settings at 5, 10, 20, and 27 PSI.

Available Configurations:

• 5 PSI Make/Break

• 10 PSI Make/Break

• 20 PSI Make/Break

• 27 PSI Make/Break

All switches are built to OEM pressure sensitivity standards with 1/8" NPT threading for easy installation on Cummins 4BT blocks.

Oil Pressure Gauges for Cummins 4BT

To complement your oil pressure switch, you may want a mechanical or electrical gauge to visually monitor pressure from the cockpit or control panel. We carry:

• Standard mechanical oil pressure gauges

• Mechanical gauges with alarms

• Electrical gauges (12V and 24V)

These gauges are essential for marine or stationary setups where quick response to pressure drops can prevent costly damage.

Why Choose Diesel Pro Power for Cummins 4BT Oil System Components?

With decades of experience and a reputation built on reliability, Diesel Pro Power is a preferred supplier for Cummins 4BT engine parts, including oil system components. We specialize in marine and industrial applications, offering high-quality products that fit right the first time and perform under pressure.

What sets us apart:

• All parts ship fast and are in stock

• Trusted by over 40,000 customers

• Expert support for marine and stationary engine users

• No guessing—just reliable fitment for your 4BT