Positive Crankcase Ventilation: Service and Repair

DIESEL ENGINES

Clean valve cover filter assemblies, ventilation pipes and connecting tube every 15,000 miles. Inspect rubber fittings and replace as necessary, or every 15,000 miles. On L-4 engines, inspect and service PCV valve every 15,000 miles. On V6 and V8 engines, replace breather cap assemblies every 30,000 miles.