PCV System: Maintenance

Service crankcase ventilation system every 30,000 miles or every 2 years. Perform this maintenance more frequently if vehicle is operated in dusty conditions.

Test PCV valve operation and check ventilation hoses and connections for leaks and obstructions. Disconnect all hoses and clean with compressed air.

On models equipped with a flame arrester, ensure that arrester is installed in hose between valve cover and air duct.