If you’re seeing vapor coming from the breather or crankcase vent, you’re probably asking:
Is this normal or is my engine going bad?
That’s where a lot of confusion comes in.
Some blow-by is completely normal. But excessive blow-by can point to internal wear, poor sealing, or a bigger issue building over time.
The key is knowing the difference.
Continue reading Diesel Engine Blow-By: How Much Is Normal and When Should You Be Concerned?
Diesel fuel injectors do more than deliver fuel.
They control injection timing, atomization, pressure, and combustion efficiency.
When an injector begins to fail, the issue is rarely just “bad fuel delivery.”
It is usually a breakdown in one of three critical areas:
Understanding these failure modes is the key to diagnosing problems correctly – and avoiding repeat failures.
Continue reading Diesel Fuel Injector Failure Explained: Internal Leakage, Timing Loss, and Combustion Imbalance
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:
Understanding the difference is critical – because each one leads to very different failure paths.
Continue reading Diesel Engine Noise During Clutch Engagement: Diagnosing Drag, Slip, and Hydraulic Failure
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.
Continue reading Diesel Engine Ticking vs Knocking: How to Diagnose Valve Train Noise Before It Causes Damage
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:
Proper diagnosis requires understanding how the belt system operates under load.
Continue reading How to Diagnose Diesel Engine Belt Noise: Identifying Pulley, Tensioner, and Accessory Failures
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.
Continue reading Why Diesel Fuel Systems Are So Sensitive (And How Small Issues Turn Into Major Repairs)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.
Continue reading Detroit Diesel Series 60 Common Issues and Failures
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.
Continue reading Dirty Diesel Fuel Injectors: What’s Really Happening Inside (And Why Cleaning Isn’t Enough)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.
Continue reading Diesel Engine Overheating: How to Diagnose the ProblemThere are many possible causes of engine failure. You can see our earlier post on diagnosing engine failures, too.
Continue reading Diesel Engine Failure Diagnosis: Compression IssuesWhen 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.
Continue reading Cummins ISX Crankshaft Failure: Signs, Causes, and What to Do Before It Costs You an EngineIf your diesel engine is running rough, smoking, or losing power, a failing fuel injector could be the cause.
One of the first questions most people ask is: How much does it cost to replace a diesel fuel injector?
The answer depends on your engine, injector type, and how far the issue has progressed. Some injector problems are caught early. Others turn into much larger repairs.
Let’s break down what actually impacts the cost – and what you can expect in 2026.
Continue reading What Does It Cost to Replace a Diesel Fuel Injector in 2026?
