chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

Sensors and Switches - Emission Control Systems > < Positive Crankcase Ventilation|Description and Operation
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Positive Crankcase Ventilation: Testing and Inspection

Clean hoses and regulating orifice in detergent oil and blow away foreign matter with compressed air. 
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If equipped with a regulating valve (PCV), disassemble valve, wash parts in detergent oil and inspect parts for damage. 

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Replace assembly if any parts are found defective. 

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Inspect hoses for cracks, fatigue or swelling. Replace hoses if defective.

Sensors and Switches - Emission Control Systems > < Positive Crankcase Ventilation|Description and Operation