Rick's Free Auto Repair Advice

Posts Tagged: Engine Blow-By

Engine Blow-By: Understanding the Basics

Understanding Engine Blow-By: What It Is and Why It Matters If you’ve ever dealt with excessive oil consumption, reduced engine performance, or a mysterious oily residue in your intake system, you might have encountered a common yet often misunderstood issue—engine blow-by. It’s found in every internal combustion engine, even new ones. However, excessive blow-by can lead to serious performance and longevity concerns. In this article, I’ll break down exactly what engine it is, why it happens, which engines are more prone to it, and whether it’s something you should be … Read More

PCV Delete vs Oil Catch Can: What Actually Works

PCV Delete Explained: Why It’s Illegal, Ineffective, and Overhyped Quick Summary A PCV delete sounds appealing if you’ve been told it will stop carbon buildup or unlock hidden horsepower—but that idea is built on misinformation. Deleting the PCV system is illegal, creates new drivability problems, vents harmful blow-by into the atmosphere, and does nothing to stop intake valve carbon. If you’re trying to reduce oil vapor entering the intake, a properly installed oil catch can is the only sensible option—and even then, it’s more about management than magic. Article PCV … Read More


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