Rocker Lever Cummins 4311990 | 3680169, 3680168

High-Performance Cummins 4311990 Rocker Lever

The Cummins 4311990 Rocker Lever is a critical component of the engine’s valvetrain, specifically engineered to support precise injector actuation and timing. Designed for heavy-duty applications, this rocker arm translates camshaft motion into accurate injector movement, ensuring dependable fuel delivery and optimal combustion efficiency. This part is also available under the numbers: 3680169, 3680168.

Reliable Valvetrain Performance

Built to withstand the extreme mechanical stresses and high temperatures of heavy-duty diesel engines, the 4311990 rocker lever offers exceptional wear resistance and longevity. It is primarily used on EPA07 15-liter Cummins ISX and QSX engines, making it a vital replacement part for maintaining proper engine timing and preventing costly valvetrain failures.

Key Features and Benefits

• Precise Injector Actuation: Ensures the fuel injector opens and closes at the exact moment required for clean, efficient combustion.
• Heavy-Duty Construction: Manufactured from premium-grade materials to resist wear, fatigue, and thermal stress under demanding operating conditions.
• Direct Fit Compatibility: Designed to meet exact manufacturer specifications for seamless installation and reliable performance in Cummins ISX and QSX series engines.

Cross-Reference / Interchange Part Numbers

This part replaces / is interchangeable with the following part numbers:

• 4311990
• 3680169
• 3680168