Cummins ISL Parts – Oil System Components

The oil system is one of the most critical elements in keeping your Cummins ISL engine running at peak performance. Whether operating in marine, industrial, or power generation environments, proper lubrication ensures that bearings, pistons, liners, and camshafts receive the oil flow needed to reduce friction and manage operating temperatures. At Diesel Pro Power, we provide a complete catalog of Cummins ISL oil pumps, oil coolers, oil pans, gaskets, and related components, trusted by more than 40,000 satisfied customers worldwide.

This section covers oil pumps, oil pans, oil coolers, gaskets, oil filters, oil pressure switches, and supporting tools designed to maintain the integrity of your lubrication system for Cummins ISL, ISC, QSC, and QSL engines.

Oil Pumps for Cummins ISL, ISC, QSC, and QSL Engines

High-Performance Oil Pumps

Oil pumps are the heart of the lubrication system, responsible for maintaining consistent oil pressure throughout the engine. A failing pump can lead to catastrophic damage from oil starvation. Diesel Pro Power offers multiple configurations of Cummins oil pumps, designed to meet the specific CPL (Control Parts List) requirements of different engine families.

• Small Drive Gear with Flanged Shaft
  Compatible with ISL, ISC, QSC, and QSL engines under multiple CPL ranges, this pump design provides durability and reliable pressure regulation. The flanged shaft improves engagement strength, reducing the risk of premature wear in high-demand applications.

• Small Drive Gear with Holding Washer Shaft
  Another configuration offered for specific CPL families, this design uses a retaining washer to secure the shaft, ensuring long service life and reliable performance. It is especially useful in high-hour industrial and marine engines where consistent oil delivery is critical.

Supporting Components for Oil Pumps

• Oil Pump Screws
  Four screws are required per engine when securing the pump. Ensuring proper torque during installation is essential for preventing leaks and maintaining correct pump alignment.

Cummins ISL Oil Pans

The oil pan is more than just a reservoir; it plays an essential role in cooling, oil pickup, and sealing.

• Standard Oil Pan for C & L Series Engines (6C, 6CT, ISC, ISL, QSC, QSL)
  Designed for heavy-duty service in marine and industrial environments, this oil pan supports proper oil circulation and temperature control. Its reinforced structure resists vibration and distortion.

Oil Pan Gaskets

To maintain a leak-free seal, the correct gasket selection is essential.

• Above Block Stiffener Plate Gasket – Ensures a tight seal between the oil pan and stiffener assembly.

• Below Block Stiffener Plate Gasket – Provides additional reinforcement and oil-tight sealing in high-pressure environments.

• Additional Gasket Options – Available for multiple ISL and QSC applications to cover different design requirements.

Cummins ISL Oil Coolers

Oil coolers maintain the correct oil temperature, preventing overheating and thermal breakdown of the lubricant.

• 15-Plate Oil Cooler
  Designed for ISL, QSL, ISC, QSC, and 6CTA 8.3 engines, this cooler ensures steady oil-to-water heat exchange. By lowering oil temperature, it extends lubricant life, maintains stable viscosity, and reduces wear on critical components.

Oil Cooler Gaskets

• Oil Cooler Cover Gasket (Inner) – Provides a reliable seal on the cooler housing, preventing oil leaks and coolant intrusion.

• Oil Suction Connection Gasket – Maintains airtight sealing between suction ports, ensuring uninterrupted oil flow.

• Rear Cover Gasket – Helps prevent leaks at the rear cover section of ISL and QSC engines.

Cummins ISL Oil Filters & Tools

Spin-On Oil Filters

Cummins ISL engines use heavy-duty spin-on oil filters with precise threading and sealing to trap contaminants effectively. Proper oil filtration prevents metal particles, carbon buildup, and debris from damaging bearings and precision components.

Oil Filter Wrench

Servicing filters requires the correct tool to prevent overtightening or damage during removal. Diesel Pro Power provides adjustable filter wrenches designed to fit Cummins, Detroit Diesel, and Caterpillar applications.

Oil Pressure Monitoring & Switches

Maintaining correct oil pressure is critical to detecting problems early. Cummins ISL engines often use electric and mechanical pressure switches to provide alerts or trigger alarms.

• 5 PSI Make/Break Switch – Early-warning system for low oil pressure.

• 10 PSI Make/Break Switch – Mid-range switch, often used in alarm systems.

• 20 PSI Make/Break Switch – Provides more conservative pressure monitoring for demanding operations.

• 27 PSI Make/Break Switch – Designed for applications requiring tighter oil pressure control and monitoring.

Gauges

• Mechanical Gauges – Offer direct, reliable readings with optional alarms.

• Electrical Gauges – Available in 12V and 24V configurations, compatible with marine dashboards and industrial control panels.

Why Choose Diesel Pro Power for Cummins ISL Oil System Components?

• Global Shipping – We ship Cummins parts to more than 180 countries.

• Guaranteed Fit – Every oil pump, cooler, pan, and gasket is precision-matched to ISL, ISC, QSC, and QSL engines.

• Proven Reliability – With over 40,000 satisfied customers, Diesel Pro Power has become the go-to source for marine and industrial Cummins components.

• In-Stock Availability – No long lead times. Get your ISL parts shipped quickly to minimize downtime.