Oil catch cans capture vaporized oil, fuel, and other particles, condensing them into a liquid. Oil catch cans collect and condense the vapor into a liquid, reducing the amount entering the intake. These particles may contaminate the air-fuel mixture in the cylinder, reducing power output. The harmful vapors that are purged from the crankcase can cause carbon buildup on the intake valves and manifold, a dirty throttle body, and liquid in the intercooler on vehicles with forced induction. While the PCV system keeps harmful vapors out of the crankcase, saving the engine from acidic oil, excessive crankcase pressure, and damage from water condensation, it’s not foolproof. The PCV (Positive Crankcase Ventilation) valve redirects this vapor out of the crankcase and back into the intake. On an engine’s combustion stroke, a small amount of vaporized air, fuel, and oil makes it past the piston rings and enters the crankcase. The goal of an oil catch can is to intercept fine oil particles in the PCV system before they are recirculated through the engine intake. Are catch cans better at preventing carbon build-up than the systems cars come with from the factory? Read on to learn the function of an oil catch can and see if it’s worth installing one on your car! What Does an Oil Catch Can Do? Oil catch cans are a popular modification on high performance and tuned vehicles, but there is a lot of speculation and general confusion as to what they do and whether or not they work.
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