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Home › Buick › 1961 › Invicta Eng CD 4H, Automatic Trans › Repair and Diagnosis (Single Page) › Engine Mechanical › Mechanical › Crankcase Ventilation Systems › System Checking › Notes

System Checking: Notes

NOTE: An engine may idle slow or rough due to a clogged ventilator valve; therefore, never adjust carburetor idle without first checking crankcase ventilator check valve  . Test system as follows:
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