Category: Cummins Diesel Engine Parts & Components

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Diagnosing a Bad Cummins ISX Crankshaft: Symptoms and Replacement

The crankshaft is essentially the backbone of your truck’s engine. It keeps the engine moving and is vital to the overall health of your rig. When this critical component begins to fail in a Cummins ISX, it can quickly lead to severe mechanical damage and costly downtime. Recognizing the early warning signs of a worn or damaged crankshaft is essential to minimizing negative impacts to your revenue and keeping your truck out of the service bay.

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The Complete Guide to Cummins Engine Rebuild Kits: Maximizing Performance and Value

Cummins Engine Rebuild Kits

When your Cummins diesel engine starts showing signs of wear, you face a critical decision: replace the entire engine or invest in a comprehensive engine rebuild. For fleet operators and owner-operators alike, Cummins engine rebuild kits represent the smart choice for restoring engine performance while maintaining cost control. These carefully engineered kits provide everything needed to bring your engine back to like-new specifications without the premium price of a complete replacement.

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Cummins N14 Fuel Injectors: How They Fail, What It Affects, and When to Replace Them

On a Cummins N14, fuel injectors are one of the most critical components controlling engine performance.

They don’t just deliver fuel – they control timing, atomization, and combustion efficiency.

And when they start to fail, the issue doesn’t stay isolated to one cylinder. It begins to affect engine balance, temperature, and long-term durability.

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VGT Options for Your Cummins ISX Diesel Engine

You’ve probably seen the term VGT or variable geometry turbocharger thrown around a lot when talking about diesel engines. You’ve probably heard even more about the problems they cause and money they can cost operators. How it’s easier and cheaper just to delete the system.

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An In-Depth Look at Diesel Engine Common Rail Fuel Injector Problems

If you’re experiencing problems with your common rail fuel injectors, you’ve probably noticed a difference in the way your diesel engine performs. And you’re probably eager to get the issue taken care of. 

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Converting a Cummins Low-Flow Cooling System to High-Flow: What It Actually Takes

Older Cummins engines – especially Big Cam and NTC/N14-era platforms – used two different cooling system designs:

  • Low-flow cooling systems
  • High-flow cooling systems

These systems are not just minor variations.

👉 They are fundamentally different in how coolant moves through the engine.

And that matters when you’re trying to solve overheating – or considering a conversion.

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Cummins ISX 870 Inframe Rebuild Problems: Why Engines Fail After a Rebuild

An inframe rebuild on a Cummins ISX 870 or ISX 871 is supposed to bring your engine back to life.

But for a lot of operators, that’s not what happens.

Instead, they run into problems almost immediately:

  • Oil Consumption
  • Blow-By
  • Low Power
  • Poor Fuel Economy

The issue usually isn’t the rebuild itself.

It’s what happens during – and right after – the rebuild.

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Cummins ISB 6.7L Fuel Injectors: What Actually Fails Inside a Common Rail Injector

Fuel injectors in a Cummins ISB 6.7L common rail system don’t just deliver fuel.

They control timing, pressure, atomization, and combustion efficiency – all within milliseconds.

When an injector begins to fail, it’s not always obvious at first.

But internally, the failure has already started.

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Cummins N14 Cylinder Head: Failure Points, Internal Stress, and What Happens When It Starts to Go

The Cummins N14 is built to handle heat and load – but the cylinder head is where those forces concentrate the most.

Over time, repeated thermal cycling, combustion pressure, and coolant flow stress begin to break things down at a microscopic level.

And when that happens, the issue usually doesn’t show up as “a bad head.”

It shows up as:

  • Coolant Loss
  • Overheating
  • Combustion Imbalance

By the time it’s obvious, the damage is already progressing.

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Cummins ISX, QSX Cylinder Head: Symptoms, Failure Causes, and Replacement Guide

If your Cummins ISX or QSX is overheating, losing coolant, or showing signs of combustion issues, the problem may be deeper than a gasket or sensor.

It could be your cylinder head.

And when a cylinder head starts to fail, it doesn’t take long before it affects the entire engine.

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Cummins ISL G Cylinder Head Failures: Why Valve Seats Drop and How to Prevent It

The Cummins ISL G natural gas engine is built for a different type of combustion.

And that difference is exactly why the cylinder head fails the way it does.

Unlike diesel engines, ISL G failures are not typically caused by pressure.

They are caused by heat, material fatigue, and valve seat wear.

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Your Premier Source for Cummins Heavy-Duty Engine Parts

Highway and Heavy Parts is the premier source for high-quality heavy-duty Cummins diesel engine parts. You know the value of dependable and long-lasting parts as a fleet owner, technician, or equipment operator to maintain your Cummins engines operating at their peak efficiency.

Here you will find blogs that focus on Cummins diesel engines and the heavy-duty parts you need to keep your large truck on the road. Read about diesel engine issues, diagnostic tips, and the best engine parts for the job.

Complete Cummins Engine Coverage

Popular Cummins Engine Models

Our comprehensive inventory covers all major Cummins engine families, including ISX, ISX15, N14, ISM, ISC, M11, and X15 engines. Whether you’re maintaining legacy engines or modern powerplants, we stock the critical components needed to keep your Cummins engines performing at their best.

ISX and N14 Engine Solutions

The ISX12 and ISX15 were involved in the phase out of the N14 and M11 engines, which were unable to meet emissions standards. Because of the shift to electronic controls, the N14 has more valve train components than the ISX. We carry parts for both engine families to support your fleet’s diverse needs.

Quality Cummins Components & Services

Engine Rebuild Parts

From complete engine rebuild kits to individual components, our Cummins parts selection includes pistons, cylinder heads, fuel injectors, turbochargers, and gasket sets. Whether you’re performing routine maintenance or major rebuilds, we have the quality parts you need.

Engine Identification Support

Need help identifying your Cummins engine? For ISB engines, you’ll find the serial number on your rocker cover or on the side of the gear housing. For Cummins ISM engines, the serial number is located on the rocker housing on the fuel pump side. Our experts can help you identify the right parts for your specific engine model.

Why Choose Highway and Heavy Parts for Cummins?

Unmatched Expertise

Our diesel engine experts understand the evolution of Cummins engines and can help you navigate the differences between engine families. From the mechanical N14 to the electronic ISX series, we know what it takes to keep these engines running strong.

Quality & Reliability

Every Cummins component in our inventory meets or exceeds OEM specifications. We understand that downtime is costly, which is why we stock only the highest quality parts designed for durability and long-lasting performance.

Comprehensive Support

Whether you’re rebuilding a Cummins ISX or maintaining an N14, our team provides expert technical support and fast shipping to minimize your equipment downtime. We serve fleet owners, technicians, and equipment operators with the parts and knowledge they need.

Fast Service & Shipping

With our extensive inventory and efficient logistics, we can quickly get you the Cummins parts you need. Our commitment to fast service helps keep your heavy-duty equipment operational and productive.

Browse Our Complete Cummins Parts Catalog

Browse our complete Cummins parts catalog today and discover why Highway and Heavy Parts is the trusted choice for diesel professionals nationwide.