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: Testing and Inspection







Piston running clearance
Example
Measured Cylinder Diameter: 81.015 mm
Measured Piston Diameter: 80.995 mm __________
The piston running clearance is: 0.020 mm

The piston running clearance should be 0.010 - 0.030 mm