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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Piston, Engine

Ford does not provide any information reqarding service or torque specifications for the short block.
Diameter (1) (3.444 - 3.445 inch)
Diameter (2) (3.4452 - 3.4456 inch)
Diameter (3) (3.444 - 3.446 inch)
Piston to bore clearance (0.0009 - 0.0017 inch)
Ring groove width-top (0.00473 - 0.0474 inch)
Ring groove width-2nd (0.0.460 - 0.0468 inch)
Ring groove width-oil (0.0984 - 0.0985 inch)
Piston Skirt Coating Thickness (0.0003 - 0.0007 inch)