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Home >> Buick >> 1966 >> Gran Sport Not Available, 5.6L Eng, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up >> Compression Pressure >> Closed Crankcase Ventilation >> Servicing System

Servicing System

Replace ventilator valve every 12, 000 miles. Clean and reoil filler cap every 6, 000 miles (Closed System), clean breather assembly every 6, 000 miles (Closed Positive).