Connecting Rods & Related Components for Cummins 6CT Engines

The connecting rod assembly in the Cummins 6CT engine plays a vital role in transferring the power of combustion from the piston to the crankshaft. This motion drives the engine’s rotating assembly, making the connecting rod one of the most stressed and essential components within the 6CT platform.

At Diesel Pro Power, we supply high-quality connecting rods, bearing sets, and bushings built specifically for the Cummins 6CT. Every component is engineered for durability, precision fitment, and dependable performance in demanding environments.

Complete Connecting Rod Assemblies for Cummins 6CT

The Cummins 6CT connecting rod is forged from heavy-duty steel and precision-machined to maintain strict tolerances. These rods are designed to:

• Deliver reliable power transfer from piston to crankshaft

• Minimize vibration and improve overall engine smoothness

• Provide long-lasting performance under heavy loads and continuous operation

When replacing rods, it is best practice to service them as a matched set to ensure engine balance and consistent combustion forces across all cylinders.

Bearing Sets for Cummins 6CT Engines

Each connecting rod in the Cummins 6CT requires a set of bearings that sit between the rod and crankshaft journal. These bearings reduce friction, maintain lubrication, and prevent direct metal-to-metal contact. Over time, they wear down and must be replaced to maintain proper clearances.

Standard Connecting Rod Bearings

Standard bearings are used when the crankshaft is in its original condition and has not been machined. They restore correct oil film thickness and reduce wear.

Oversize Bearing Options

If the crankshaft has been ground during overhaul, oversize bearings are required. Options include 0.25 mm and 0.50 mm oversize to match re-machined crank journals.

Each set contains both the upper and lower shells to service one connecting rod. Designed for durability, these bearings provide:

• Consistent oil clearances for reliable lubrication

• Smooth, anti-friction surfaces

• Strength to withstand heat and high loads

Connecting Rod Bushings for Cummins 6CT

The rod bushing sits inside the small end of the connecting rod and supports the piston pin. Over time, these bushings can develop excess clearance, which affects piston stability and can lead to pin scoring or misalignment.

Our Cummins 6CT connecting rod bushings are:

• Manufactured to exact specifications for proper fit

• Built with durable alloys for extended service life

• Designed to be press-fit for easy installation during rebuilds

Replacing worn bushings during overhaul ensures piston pins remain properly supported, extending the life of the piston-to-rod assembly.

Importance of Servicing the 6CT Connecting Rod Assembly

A worn or damaged connecting rod, bearing, or bushing can cause serious engine issues. Common signs of connecting rod problems include:

• Knocking sounds when the engine is under load

• Drop in oil pressure due to bearing wear

• Increased vibration during operation

• Metallic debris in the oil system

Servicing these components at regular overhaul intervals is essential to preserving the reliability of the Cummins 6CT.

Applications of the Cummins 6CT Connecting Rod Assembly

The Cummins 6CT engine is widely used in marine propulsion, industrial power units, construction machinery, and agricultural equipment. Its connecting rod system is engineered to handle demanding environments, ensuring dependable operation in:

• Marine engines powering vessels and workboats

• Industrial generators requiring continuous power output

• Construction equipment such as excavators and loaders

• Agricultural machinery for heavy farming operations

Diesel Pro Power Advantage

When choosing Diesel Pro Power for Cummins 6CT connecting rod components, you benefit from:

• A trusted source with over 40,000 satisfied customers worldwide

• Fast global shipping on all Cummins parts

• Expert support to ensure the correct fit for your 6CT engine

• Guaranteed compatibility with the Cummins 6CT

Our goal is to keep your Cummins 6CT running at peak efficiency, with high-quality replacement parts that you can trust.