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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Internal Pressure

This can be accomplished by making the PCV valve inactive and blocking off the air cleaner inlet to the RAC hole. By running an engine in a closed system, crankcase pressure will build up and force oil to the source. This method can build up extreme pressure and should be monitored by periodically removing the dipstick to relieve the crankcase pressure.