Honda 11856-RDJ-A00 Tube, PCV

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PCV system is an acronym that stands for Positive Crankcase Ventilation. It reduces the emissions of hydrocarbons in the environment by drawing fresh air into the crankcase where it mixes with the blow-by gases. The PCV valve then pulls this mixture to the intake manifold. When these vapors flow, they are controlled by the PCV valve which helps maintain idle quality. Fresh air inlet hose in Acura and Honda models is used to draw fresh air into the crankcase from two places, that is, the air intake duct and valve cover. Check hoses for damage and inspect for vacuum at idle on PCV valve, as well as worn out PCV valve grommet when examining PCV system.

First of all, hoses that make up the emission system of a car need to be checked regularly for deterioration signs such as cracks, leaks, and hardening due to high temperatures. The clamps should be tight and the hoses not distorted. In case there is any blockage in the PCV system hose, it should be cleared. The vacuum hoses need to have matching material and thickness when replaced. To detect leaks, you can use a vacuum hose as a stethoscope. In case there are bends, crimps or cracks on metal lines, then they should be replaced with seamless steel tubing.

Vacuum hoses should be removed for comprehensive examination and labeled for correct reinstallation.

The mixture of fresh air and blow-by gases is drawn through the PCV valve to the intake manifold via intake manifold vacuum, effectively scavenging crankcase vapors.