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 Pin: Testing and Inspection






PISTON PIN HOLE DIAMETER
Measure each piston pin hole diameter at the four points shown.

Replace piston that is not within specifications.





PISTON PIN DIAMETER
Use a micrometer to inspect the piston pin diameter in the X and Y directions at points A, B. C and D as shown.

Replace piston pin that is not within specifications.