Cummins QSK 19 Engine Parts - Injector Section

Fuel Injector Components for Cummins QSK19 Engines

Diesel Pro Power offers a wide selection of high-quality aftermarket injector kits and components for Cummins QSK19 engines. These fuel systems are designed to deliver optimal combustion performance, reliability under extreme loads, and efficient fuel delivery for large-bore applications. Our injector kits are compatible with a variety of CPL configurations, and we supply all supporting hardware for proper installation and long-term performance.

Whether you're replacing a single injector or rebuilding the entire fuel system, you'll find every component here to match Cummins QSK19 fuel system standards—with the added confidence of fast shipping and support trusted by over 40,000 satisfied customers.

Complete Injector Kits for Cummins QSK19 Engines

Injector Kit – For QSK19 Engines with Specified CPL Numbers

These aftermarket injector kits are engineered to meet or exceed OEM quality standards, delivering consistent fuel atomization and improved combustion efficiency in demanding applications. They are suitable for use in a wide range of QSK19 engines with Common Power List (CPL) numbers tailored to specific performance configurations.

Applications Include:

• Marine propulsion systems
  
  

• Generator sets
  
  

• Mining and oilfield power units
  
  

• Industrial pumping and heavy-duty stationary power
  
  

Each injector kit includes:

• Remanufactured or new high-pressure injector
  
  

• Nozzle assembly
  
  

• O-rings and internal seals
  
  

• Protective packaging
  
  

Popular CPL Compatibility Examples:

• CPL 476, 477, 610, 640, 884
  
  

• CPL 478, 501, 503, 505, 520, 521, 526, 584, 672, 687, 688, 736, 737, 738, 824, 885, 886, 888, 1190, 1506, 2634
  
  

• CPL 502, 724, 952, 969, 2184
  
  

• CPL 508, 513, 514, 515, 823
  
  

Please verify the CPL on your engine tag or contact our team to ensure compatibility with your specific configuration.

High-Pressure Injector Installation Kit

This injector installation kit for Cummins QSK19 engines includes all critical mounting and sealing hardware necessary when replacing high-pressure fuel injectors. Perfect for service technicians and maintenance teams performing top-end rebuilds or fuel system upgrades, this kit ensures a clean, leak-free installation.

Included Components:

• Injector seals
  
  

• Mounting hardware
  
  

• Protective components for assembly
  
  

Designed for use with all high-pressure fuel injector configurations found in QSK19 series engines.

Injector Mounting Seal – One Per Injector

Each Cummins QSK19 fuel injector requires a dedicated mounting seal to prevent combustion gas blow-by and ensure consistent injector clamping force. This component is made from high-temperature-resistant material and provides reliable sealing under full-load operating conditions.

Installation Note: One seal is required per injector and should always be replaced during injector removal or replacement.

Tappet Assembly for QSK19 Engines

The tappet assembly plays a critical role in the fuel system timing by translating camshaft motion into mechanical actuation of the injector. This component is precision-machined for wear resistance and consistent fuel delivery performance over extended service intervals.

Benefits of Diesel Pro’s Aftermarket Tappet Assemblies:

• Durable construction for extended lifecycle
  
  

• Smooth surface finish for low friction
  
  

• Compatible with both standard and high-output QSK19 configurations
  
  

Why Replace Your QSK19 Injectors?

Fuel injectors are among the most vital components in any diesel engine, and on large platforms like the Cummins QSK19, maintaining optimal injector performance ensures:

• Efficient fuel consumption
  
  

• Reduced emissions output
  
  

• Smooth engine operation at high loads
  
  

• Protection of pistons and cylinder walls from improper combustion patterns
  
  

Symptoms of worn or faulty injectors include:

• Engine misfires
  
  

• Hard starting or white smoke
  
  

• Uneven idling or surging under load
  
  

• Poor fuel economy
  
  

Replacing injectors at the first signs of degradation helps extend the life of your QSK19 engine and prevent further internal wear.

Supporting Components to Include with Your Injector Service

When servicing injectors, consider replacing these related components to ensure a successful installation and optimal engine performance:

Gasket Sets

Top-end or injector gasket sets are recommended to reseal all critical joints when injectors are removed. Diesel Pro offers complete cylinder head gasket kits that pair with injector installation.

Fuel Connector Tubes

High-pressure connector tubes between the fuel rail and injectors can wear out or accumulate deposits. Upgrading them at the same time as your injectors improves flow and prevents injector recontamination.

Valve Adjustments

Injector service is the perfect time to perform a full valve lash adjustment using feeler gauges. Diesel Pro carries tools and instructions specifically for QSK19 top-end service.

Choosing the Right Injector Kit by CPL

The Cummins QSK19 engine platform uses CPL (Control Parts List) numbers to indicate exact part compatibility. These numbers dictate variations in:

• Injector spray pattern and fuel flow rates
  
  

• Camshaft profiles and timing
  
  

• Turbocharging configurations
  
  

• Emission levels and fuel mapping
  
  

If you are unsure which CPL your engine uses, check the metal data plate located on the rocker cover or engine block. Our team can also help you match the right injector kit based on your engine serial number.

Fast Shipping and Worldwide Delivery

At Diesel Pro, we understand that downtime costs money. That’s why all QSK19 injectors and components are ready to ship from our fully stocked warehouse, with global delivery options to keep your operation running without delay. Whether you're managing a vessel fleet, operating a mining generator, or running a remote drilling site, we’ve got you covered.

Trusted by 40,000+ Customers Worldwide

Diesel Pro Power has earned the trust of thousands of customers across marine, industrial, and power generation industries. Our aftermarket Cummins QSK19 injectors offer the right combination of quality, price, and support for any rebuild or repair project.