W350 1 Ton Pickup 4WD V8-360 5.9L VIN U 4-bbl (1982)
Positive Crankcase Ventilation: Service and Repair
On light duty cycle vehicles, check system operation every 15.000 miles, and replace PCV valve every 30.000 miles. On heavy duty cycle
vehicles, check system operation every 12,000 miles and replace valve every 24,000 miles.
