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Posted on July 12, 2025July 10, 2026 by David Ley

Most Common Cylinder Head Problems in Diesel Engines

Cylinder heads are one of the most critical components in a diesel engine. They seal combustion pressure, manage airflow, house the valves and injectors, and help transfer heat away from the combustion chamber.

Because cylinder heads operate under extreme pressure and temperature, they are also one of the most failure-prone areas in a diesel engine.

Many major engine failures eventually trace back to cylinder head problems caused by:

Overheating
Cooling system issues
Excessive combustion pressure
Poor maintenance
Improper installation procedures

Some cylinder head failures develop slowly over hundreds of thousands of miles. Others can happen suddenly and cause catastrophic engine damage in minutes.

A failed cylinder head can lead to:

Coolant loss
Compression loss
White smoke
Hard starting
Engine overheating
Piston and liner damage

That is why accurate diagnosis matters so much.

Posted on July 3, 2025May 21, 2026 by Caitlyn Vance

Diesel Engine Noise During Clutch Engagement: Diagnosing Drag, Slip, and Hydraulic Failure

If you’re hearing noise when engaging the clutch, don’t ignore it.

What might seem like a minor issue – grinding, chatter, or a harsh engagement – can point to mechanical or hydraulic problems that will only get worse over time.

On heavy-duty diesel applications, clutch engagement issues typically fall into three categories:

Clutch Drag (Not Fully Disengaging)
Clutch Slip (Not Fully Engaging)
Hydraulic System Failure Or Imbalance

Understanding the difference is critical – because each one leads to very different failure paths.

Posted on June 29, 2025June 29, 2026 by Caitlyn Vance

The Top Ways to Kill a Caterpillar Turbocharger

Turbochargers play a critical role in modern Caterpillar diesel engines.

They help increase power, improve combustion efficiency, maintain emissions performance, and support fuel economy by forcing additional air into the engine. Without proper turbocharger operation, even a healthy diesel engine can experience power loss, excessive smoke, poor fuel economy, and high exhaust temperatures.

Yet one of the most common mistakes made during a turbocharger replacement has nothing to do with the turbo itself.

Many failed turbochargers are replaced without identifying the root cause of the original failure.

As a result, the replacement turbocharger often suffers the same fate.

Understanding why Caterpillar turbochargers fail—and how to prevent repeat failures—can help reduce downtime, avoid unnecessary repairs, and improve long-term engine reliability.

Posted on June 22, 2025June 30, 2026 by David Ley

Diesel Engine Smoke Colors: What White, Black, and Blue Smoke Mean

A healthy diesel engine should produce little to no visible smoke once it reaches normal operating temperature.

So when smoke starts coming out of the exhaust, it is usually a sign that something inside the engine is not working as intended.

The good news is that the color of the smoke can provide valuable clues about what is happening. In many cases, experienced diesel technicians can narrow down potential causes simply by observing the exhaust before they ever connect a diagnostic tool.

Whether you’re operating a Caterpillar, Cummins, Detroit Diesel, International/Navistar, Paccar, Mack, Volvo, John Deere, Ford, Mercedes-Benz, Chevy/GMC, Dodge, Perkins, or another diesel platform, understanding what your exhaust is trying to tell you can help identify problems before they become major repairs.

Posted on June 19, 2025May 21, 2026 by Caitlyn Vance

Diesel Engine Ticking vs Knocking: How to Diagnose Valve Train Noise Before It Causes Damage

Not all engine noise is the same.

A ticking sound and a knocking sound may seem similar, but they point to very different issues inside your diesel engine.

In many cases, both originate in the valve train system – and both can escalate into major engine damage if ignored.

Posted on June 17, 2025May 21, 2026 by Caitlyn Vance

How to Diagnose Diesel Engine Belt Noise: Identifying Pulley, Tensioner, and Accessory Failures

Belt noise on a diesel engine is not just an annoyance.

It is often an early warning sign of misalignment, bearing failure, or improper belt tension.

Ignoring it can lead to:

Accessory Failure
Loss Of Charging System
Cooling System Issues
Unexpected Downtime

Proper diagnosis requires understanding how the belt system operates under load.

Posted on June 12, 2025May 21, 2026 by Caitlyn Vance

Why Diesel Fuel Systems Are So Sensitive (And How Small Issues Turn Into Major Repairs)

If you’ve ever dealt with a diesel fuel system issue, you know how quickly things can escalate. What starts as a minor problem – like a slight misfire, rough idle, or extra smoke – can quickly turn into major engine damage if it’s not addressed early.

That’s what makes modern diesel fuel systems so challenging.

They’re not just sensitive – they’re precise to the point where even small disruptions can create serious problems. When something in the system changes – even slightly – it directly impacts combustion. If you’re already dealing with fuel system issues or looking to prevent them, you can explore our full range of diesel fuel system components designed for reliability and performance.

Posted on June 6, 2025April 30, 2026 by David Ley

Detroit Diesel Series 60 Common Issues and Failures

Do you own a Detroit Diesel Series 60 engine? It probably runs well for the most part. All three versions of this electronically-controlled engine have a favorable reputation; despite being out of production for years, the Series 60 remains a popular choice for many truck drivers.

Posted on June 6, 2025May 21, 2026 by Caitlyn Vance

Dirty Diesel Fuel Injectors: What’s Really Happening Inside (And Why Cleaning Isn’t Enough)

Dirty or clogged diesel fuel injectors are one of the most common – and most misunderstood – fuel system problems.

A lot of people think it’s just a restriction issue. Spray some cleaner, maybe swap a filter, and you’re good to go.

But in reality, injector contamination leads to precision failure inside the injector itself – and once that starts, performance drops fast.

Before you try a quick fix, it’s important to understand what’s actually happening inside your injectors.

Posted on May 28, 2025May 21, 2026 by Caitlyn Vance

Diesel Engine Overheating: How to Diagnose the Problem

Diesel engine overheating is one of the most common – and most damaging – issues you can face.

What starts as a slight temperature increase can quickly turn into major engine damage if not diagnosed correctly.

If your diesel engine is overheating, identifying the root cause early is critical to preventing expensive repairs and downtime.

Posted on May 6, 2025April 30, 2026 by David Ley

Diesel Engine Failure Diagnosis: Compression Issues

There are many possible causes of engine failure. You can see our earlier post on diagnosing engine failures, too.

Posted on April 13, 2025May 21, 2026 by Caitlyn Vance

Cummins ISX Crankshaft Failure: Signs, Causes, and What to Do Before It Costs You an Engine

When a Cummins ISX starts running rough, vibrating, or misfiring, most people don’t immediately think about the crankshaft.

That’s the problem.

Because by the time the crankshaft shows obvious symptoms, the damage is usually already happening inside the engine – and it doesn’t take long before it turns into a full rebuild.

If you’re dealing with vibration, low oil pressure, or unusual engine noise, this is one issue you don’t want to ignore.