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Year: 2025

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Metal camshafts on a white surface

How and Why Camshafts Break: Causes and Prevention

Think of the camshaft as the mechanical backbone of the valvetrain. It controls the precise timing of valve operation, which dictates when intake and exhaust valves open and close, managing airflow, and keeping combustion cycles in check.  When it’s working properly, everything runs in rhythm. But

mechanic looking at engine

Which Is Better: Single or Dual Overhead Cam?

You’re sorting through spec sheets, comparing engines. One model lists a single overhead cam; another boasts a dual overhead setup. And suddenly you’re faced with the kind of question that doesn’t come with a simple answer: which is better—SOHC or DOHC? Let’s make one thing clear:

A person repairing an engine

Why Camshaft Bolts Break: Common Causes and Fixes

If your engine misfire turned into a broken cam or flashing check engine light, you may be wondering what went wrong. Camshafts, especially in high performance applications with roller tappet cams or flat tappet cams, rely on stable mounting and exact torque. At Behind The 8,

mechanic putting on gloves

How to Set Timing on a Dual Overhead Cam Engine

There’s no denying that setting the timing on a Dual Overhead Cam (DOHC) engine is precise work that directly impacts valve timing, combustion efficiency, and performance. Understanding how to set timing on a dual overhead cam engine is key to getting peak output.  Proper engine timing

close-up of the rocker arms, valve springs, and valve stems in an engine

What Is a Dual Overhead Cam (DOHC) and How Does It Work?

You’ve seen “DOHC” on an engine spec sheet or heard it mentioned at a parts counter—but if you’ve never really looked into how engines are built, it probably sounds like alphabet soup. Spoiler: it’s actually pretty straightforward, and once you get it, you’ll start to see

engine with exposed camshaft assembly

Causes of Broken Camshaft Bolts and How to Prevent Failure

If you’ve ever had a camshaft bolt snap or shear off, you know the damage isn’t just inconvenient—it can be catastrophic. Whether you’re a shop owner, a DIY diesel tech, or just trying to figure out why your camshaft bolts failed, it’s worth taking a closer

Caterpillar earth mover on beach

How to Replace a Head Gasket on a Caterpillar Engine

If you’re running heavy-duty machinery, head gasket failure isn’t just a mechanical issue—it’s a major disruption. A failed CAT head gasket can lead to coolant leaks, loss of compression, and even catastrophic engine block damage if left unchecked. Whether you’re managing maintenance of a fleet or

mechanic working on diesel engine

What Does a Cam Shaft Do? A Deep Dive Into One of Your Engine’s Most Critical Components

If you’ve ever popped the hood and wondered what actually controls the rhythm of your engine, the cam shaft is a good place to start. Whether you’re dealing with a diesel-powered workhorse or a standard gasoline engine, this component is critical to how your internal combustion

mechanic working on diesel engine

How Much Does It Cost to Replace a Cylinder Head?

There are lots of reasons why diesel is still king in heavy-duty applications. A well maintained diesel engine can last for ~1,250,000 kilometers (800,000 miles), but even the most optimistic lifespan figures need to be taken with a grain of salt–maintenance and usage habits play a

set of wrenches hanging on blue wall

How to Remove a Broken Cylinder Head Bolt Without Damage

With so many costs on the rise, it’s natural to look for DIY solutions when it comes to keeping your vehicle on the road. Why risk a big labour bill if you just need to replace a broken part? Well, depending on your problem, that approach