Crankcase Ventilation Systems: Maintenance

After long periods of engine operation, ventilation valve tends to become clogged, which will affect proper engine operation.

Every 30, 000 miles for Federal vehicles, and 60, 000 miles for California vehicles, clean and inspect system and replace PCV valve.

Fig 1: Tercel (1A-C Engine) Crankcase Ventilation System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Celica, Corona & Pickup (20k Engine) Crankcase Ventilation System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Celica Supra and Cressida (4ME Engine) Crankcase Ventilation System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002