Cummins QSB 7.0 Parts for Canada - Camshaft Section

Cummins QSB 7.0 Camshaft & Valve Train Components

The camshaft and its related components are at the heart of the Cummins QSB 7.0’s precise fuel and air delivery system. In a modern, high-performance marine or industrial diesel engine, the camshaft controls valve timing, ensuring that intake and exhaust valves open and close at exactly the right moments in the combustion cycle. This section of the Cummins QSB 7.0 parts catalog covers essential camshaft components, including camshaft bushings, valve lifters, and related hardware, all engineered for optimal fit and durability.

At Diesel Pro Power, we serve over 40,000 satisfied customers worldwide, supplying only high-quality camshaft parts built to OEM specifications or better, ensuring your QSB 7.0 engine runs with factory-level performance and reliability.

Camshaft Bushings for Cummins QSB 7.0

The camshaft bushing is a precision-machined bearing surface that supports the camshaft within the engine block. Its primary role is to reduce friction between the rotating camshaft and the stationary block, allowing smooth movement and consistent valve timing.

In the Cummins QSB 7.0, camshaft bushings are designed to withstand high loads, oil pressure variations, and temperature extremes common in marine and heavy-duty environments. Proper lubrication and a correctly installed bushing are critical—worn or improperly aligned bushings can lead to camshaft misalignment, valve train noise, and eventual engine damage.

Key benefits of a quality camshaft bushing:

• Reduces friction and wear on the camshaft journals
  
  

• Maintains precise camshaft alignment
  
  

• Supports consistent valve timing and engine performance
  
  

• Extends the life of the camshaft and related components
  
  

When replacing camshaft bushings, always inspect the camshaft journals for wear and check oil passages to ensure proper lubrication. Diesel Pro Power provides bushings for a wide range of Cummins ISB and QSB engines, ensuring compatibility with the QSB 7.0.

Valve Lifters (Tappets) for Cummins QSB 7.0

Valve lifters—also known as tappets—are critical components that transmit the motion of the camshaft lobes to the pushrods and, ultimately, the valves. In the QSB 7.0, lifters must operate smoothly under high-load conditions and remain free of sticking or scuffing that can disrupt valve operation.

Two common designs for the QSB series include:

• Early-design valve lifters for engines built before 2003
  
  

• Updated valve lifters for engines built from 2003 onward
  
  

While the basic function remains the same, later lifters often feature updated materials or oil channel designs for improved wear resistance. Selecting the correct lifter type for your QSB 7.0 is essential to maintain proper camshaft-to-valve timing and to prevent premature wear of both lifters and camshaft lobes.

Advantages of using OEM-grade valve lifters:

• Ensures precise valve lift and timing
  
  

• Reduces wear on camshaft lobes
  
  

• Optimizes airflow and combustion efficiency
  
  

• Minimizes risk of valve train noise and failure
  
  

Importance of Proper Camshaft and Lifter Maintenance

The camshaft and lifters work together to regulate airflow in and out of the cylinders, directly affecting fuel efficiency, power output, and engine longevity. For the Cummins QSB 7.0, which is widely used in marine propulsion, auxiliary power, and industrial equipment, neglecting these components can lead to costly downtime and repairs.

Maintenance tips:

• Use the correct grade and type of engine oil to maintain lubrication
  
  

• Replace lifters whenever a camshaft is replaced to prevent uneven wear
  
  

• Inspect camshaft lobes for scoring, pitting, or abnormal wear patterns
  
  

• Check for proper oil flow through lifter galleries during assembly
  
  

Why Choose Diesel Pro Power for QSB 7.0 Camshaft Parts

• Global shipping for fast delivery to any port or job site
  
  

• OEM-equivalent quality for reliable operation under load
  
  

• Dedicated customer support with deep Cummins QSB expertise
  
  

• Proven track record with over 40,000 satisfied customers
  
  

All camshaft bushings, valve lifters, and related components are inspected before shipment to ensure you receive parts ready for immediate installation.