Cummins QSC Parts - Connecting Rod Section

Connecting Rod Components for Cummins QSC Engines

The connecting rod is one of the most critical components in any diesel engine, acting as the mechanical bridge between the piston and the crankshaft. In Cummins QSC engines, the connecting rod must withstand extreme pressures and loads while maintaining precise alignment to ensure efficient power transfer. Proper maintenance and timely replacement of connecting rod bearings, bushings, and related hardware is essential to preserve engine performance, reliability, and service life.

At Diesel Pro Power, we offer a complete selection of connecting rod parts for Cummins QSC engines, including bearing sets in multiple sizes and bushings designed for long-lasting durability. With over 40,000 satisfied customers worldwide, we supply only premium-quality parts that meet or exceed OEM standards, ensuring a perfect fit and dependable operation.

Connecting Rod Bearings for Cummins QSC

The connecting rod bearing provides a smooth, low-friction surface between the rod and the crankshaft journal. Over time, wear from constant movement, high temperatures, and heavy loads can cause bearings to lose their protective layer, leading to reduced oil clearance and potential damage to the crankshaft.

We carry multiple bearing options for Cummins QSC engines to match different rebuild requirements:

• Standard Size Bearings
  Designed to restore factory performance during routine rebuilds when crankshaft journals remain within original specifications. These bearings are ideal for preventive maintenance and ensure consistent oil flow and load distribution.

• 0.25 mm Oversize Bearings
  Perfect for engines where the crankshaft has been reground or shows signs of minor wear. The slightly thicker bearing material compensates for the reduced journal diameter, restoring proper oil clearance and preventing excessive vibration or knock.

• 0.50 mm Oversize Bearings
  Used in more extensive rebuilds where the crankshaft has undergone significant machining. These bearings provide the extra material needed to maintain alignment, stability, and protection against high-pressure loading.

Each bearing set includes both the upper and lower shells required to service one connecting rod. Whether you are completing a full engine overhaul or addressing an isolated rod journal issue, these bearings ensure proper lubrication and support.

Connecting Rod Bushings for Cummins QSC

The connecting rod bushing sits at the small end of the rod, providing a durable surface for the piston pin. Because it handles constant oscillating motion, the bushing is subject to heavy wear. A worn or damaged bushing can lead to piston misalignment, abnormal noise, or increased stress on the connecting rod itself.

Our high-quality bushings for Cummins QSC engines are engineered for precision fitment and excellent wear resistance. Replacing bushings during an overhaul helps extend piston life, maintain compression, and prevent premature failure of both the piston and connecting rod assembly.

Why Connecting Rod Parts Matter in Cummins QSC Engines

The Cummins QSC is a powerful mid-range diesel engine widely used in marine, industrial, and heavy-duty applications. Its connecting rod system must handle extreme torque and combustion pressures while ensuring smooth, balanced operation. Even small amounts of wear in rod bearings or bushings can lead to:

• Loss of oil pressure and lubrication breakdown

• Knocking or tapping noises under load

• Increased crankshaft wear and potential journal scoring

• Reduced fuel efficiency and higher operating temperatures

• Risk of catastrophic engine failure if neglected

For these reasons, regular inspection and replacement of connecting rod components is one of the most important aspects of preventative maintenance.

Benefits of Choosing Diesel Pro Power for QSC Connecting Rod Parts

• Global shipping with fast delivery – no downtime waiting on parts

• Proven quality – all components meet or exceed OEM standards

• Expert support – our team helps you select the correct bearings or bushings for your specific QSC application

• Trusted by 40,000+ customers worldwide – serving marine and industrial professionals for decades

Related Components to Consider During Service

When working on Cummins QSC connecting rods, it is highly recommended to inspect or replace the following related parts for a complete service solution:

• Piston pin and retaining clips

• Piston assemblies and rings

• Gasket sets for sealing the bottom end

• Crankshaft seals and bearings

• Oil pump and lubrication system components

A complete approach ensures that all wear-prone parts are renewed together, reducing the risk of imbalance or premature wear after reassembly.