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)

Or, hide this message: temporarily or permanently

Piston, Engine



Piston ring end gaps





Piston ring to groove clearance





Cylinder bores
Deviation from nominal dimension max. 0.08 mm

Piston and cylinder dimensions

Piston and cylinder dimensions:





1) Dimensions are without graphite coating (thickness 0.02 mm). The graphite coating wears away.