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

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Piston Ring, Engine





Ring Groove Clearance
Using a feeler gauge, measure the clearance between a new piston ring and the wall of the ring groove.





Standard ring groove clearance





Piston Ring End Gap
Using a piston, push the piston ring a little beyond the bottom of the ring travel, 110 mm (4.33 inch) from the top of the cylinder block.





Standard end gap