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)

Or, hide this message: temporarily or permanently

Compression Check

AllData Editors Note - Ford does not provide a cranking pressure specification, only an acceptable range.

Compression pressures are considered within specification if they are at least 350 psi and the lowest reading cylinder is within 50 psi of the highest.

NOTE: Variations exceeding specifications indicate an improperly seated valve or worn/broken piston rings.