Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Positive Crankcase Ventilation: Service and Repair


Clean hoses and regulating orifice with compressed air. Check hoses for cracks, fatigue and swelling. Replace defective components as required.
NOTE: Large amounts of oil leaking from the engine can indicate a problem in the PCV system. If this condition exists, check the entire PCV system for blockages that would cause abnormally high crankcase pressures.