Cummins ISB 6.7 Parts - Camshaft Section

Camshaft Components for Cummins ISB 6.7 Engines

The camshaft system is one of the most critical elements of the Cummins ISB 6.7L engine. It regulates valve timing and ensures optimal airflow and exhaust gas management within the combustion cycle. Whether your ISB 6.7L is installed in a marine vessel, industrial application, or heavy-duty equipment, a well-functioning camshaft and its associated components—such as bushings and valve lifters—are essential for peak performance, fuel efficiency, and extended service life.

At Diesel Pro Power, we provide high-quality, OEM-spec camshaft components for Cummins ISB 6.7 engines, trusted by over 40,000 satisfied customers worldwide. Our selection also covers related ISB4.5, ISB5.9, QSB4.5, QSB5.9, and QSB6.7 engines, ensuring you can source the exact parts you need for compatible models.

Camshaft Bushings for Cummins ISB 6.7

Camshaft bushings serve as precision-engineered bearings that support the camshaft inside the engine block. These bushings reduce friction, maintain alignment, and prevent wear during high-load operation. Over time, bushings can wear down due to constant motion and exposure to engine oil, leading to reduced efficiency and potential camshaft misalignment.

Benefits of Replacing Camshaft Bushings

• Improved camshaft stability – Ensures consistent valve timing and lift.

• Reduced wear – Protects both the camshaft and engine block from excessive friction.

• Extended service life – Prolongs the operational lifespan of your engine.

Applications

Our camshaft bushings are compatible with:

• Cummins ISB 6.7

• ISB 4.5

• ISB 5.9

• QSB 4.5

• QSB 5.9

• QSB 6.7

These are manufactured to Cummins specifications, ensuring proper oil clearance and fitment.

Valve Lifters (Tappets) for Cummins ISB 6.7

Valve lifters—also called tappets—transfer motion from the camshaft lobes to the pushrods, opening and closing the valves with precise timing. A worn or damaged valve lifter can lead to noisy operation, loss of performance, and even engine failure if left unchecked.

Types of Cummins ISB 6.7 Valve Lifters Available

We offer two main versions to match production years and specific configurations:

Valve Lifters for Pre-2003 Cummins Engines

• Designed for engines manufactured before 2003.

• Maintains original lift characteristics and camshaft interface.

• Constructed from hardened steel for durability under constant impact.

Valve Lifters for 2003 and Later Cummins Engines

• Updated design to match later-generation camshaft profiles.

• Enhanced surface treatment for reduced wear in high-pressure applications.

• Compatible with modern Cummins ISB 6.7 and QSB platforms.

Signs That Your Camshaft or Lifters Need Replacement

Recognizing early symptoms of camshaft or lifter wear can save you from costly engine repairs. Common indicators include:

• Tapping or ticking sounds from the top end of the engine.

• Loss of power or poor acceleration.

• Inconsistent idle or misfiring under load.

• Metal shavings in engine oil (often caused by lifter or cam lobe wear).

If you observe these issues, it’s best to inspect and replace worn components before they lead to more severe damage.

Installation Tips for Cummins ISB 6.7 Camshaft Components

• Always check clearances – Measure bushing-to-camshaft clearance to ensure it meets Cummins specifications.

• Lubricate before installation – Use assembly lube on lifters and cam lobes to prevent dry starts.

• Follow torque sequences – Improper tightening can distort bushings or lifter bores.

• Replace related components – Consider replacing pushrods, rocker arms, and valve springs during a camshaft service for a full top-end refresh.

Why Choose Diesel Pro Power for Cummins ISB 6.7 Camshaft Parts

• Global shipping – We deliver to over 180 countries.

• Same-day order processing – Most orders placed before 3 PM ship the same day.

• Expert support – Our technical team can guide you through selection and installation.

• Proven reliability – Trusted by marine, industrial, and heavy-duty operators for decades.