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: Description and Operation

PCV System:

PURPOSE
The Positive Crankcase Ventilation (PCV) System cycles crankcase gases back through the engine where they are burned. On some engine applications, the PCV system is connected to the evaporative emission system.

NOTE: Do not remove the PCV system from the engine. Removal of the PCV system will adversely affect fuel economy and engine ventilation resulting in shorter engine life.