The Positive Crankcase Ventilation (PCV) valve is part of a system which is designed to protect the atmosphere from harmful vapors. Blow-by gas from the crankcase, as well as fumes from crankcase oil, are diverted into the combustion chamber where they are burned during engine operation. Proper operation of this system will improve engine performance, as well as decrease the amount of harmful vapors released into the atmosphere.
Each Acura is equipped with a Positive Crankcase Ventilation (PCV) system in which blow-by gas is returned to the combustion chamber through the intake manifold and/or the air cleaner.
The maintenance interval for the PCV valve is 60,000 miles (96,000 km) normal circumstances. Under severe operating conditions, the PCV valve may need to be changed sooner.
REMOVAL & INSTALLATION
See Figures 1, 2 and 3
- The PCV valve is mounted in the intake manifold and has a hose connected to it from the crankcase breather chamber. The valve is removed by pulling it from the manifold.
- Check for loose, disconnected or deteriorated tubes and replace if necessary. Make sure the hoses are clean inside, cleaning them with a safe solvent, if necessary. If the system has a condensation chamber attached to the bottom of the air cleaner, unscrew and remove the chamber, clean and replace it; when removing the top gasket from the chamber, note the angle of installation. Reinstall it in the same position to provide proper airflow.
- Check the valve by pulling it out of the manifold with the engine idling. Cover the open end of the valve with your finger so airflow is stopped. If the valve clicks, it is OK; if not, replace it.
For further information on the servicing of Acura emission control components, see Emission Controls of this repair guide.
- Install the PCV valve in the reverse order of removal.