Chevrolet Nova/ChevyII 1962-1979

PCV Valve

Print

REMOVAL & INSTALLATION





Click image to see an enlarged view

Fig. Fig. 1 Typical Positive Crankcase Ventilation (PCV) system air flow schematic



Click image to see an enlarged view

Fig. Fig. 2 Cross-sectional view of a PCV valve



Click image to see an enlarged view

Fig. Fig. 3 Positive Crankcase Ventilation (PCV) system component locations-6-cylinder engine on the left, 8-cylinder engine on the right



Click image to see an enlarged view

Fig. Fig. 4 Remove the PCV valve from the grommet in the valve cover



Click image to see an enlarged view

Fig. Fig. 5 If replacement is necessary, disconnect the PCV valve from the hose

The Positive Crankcase Ventilation (PCV) valve should be replaced every 24 months or 24,000 miles on cars built up to 1974, every 30,000 miles on 1975-77 cars, or every 15,000 miles or 12 months on 1978-79 cars. Symptoms of a defective PCV valve are: rough idle, oil in air cleaner, oil leaks, or excessive oil sludging or dilution.

Inspect the valve at every oil change by pulling the valve from the rubber grommet in the valve cover. Shake the valve, if a rattling sound is heard, the valve is in good condition.

 
label.common.footer.alt.autozoneLogo