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Piston Ring Gap - Installation Check

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Piston-ring end gap at installation and worn - typical 0.1–0.2 % of bore new, scrap at 0.5 %.

Formula

$$ g_{new} \approx 0.0015 D, \quad g_{max} \approx 0.005 D $$

Symbol legend

SymbolMeaningUnitSource
$D$Cylinder boremmengine spec
$g$End gapmmfeeler gauge

Sources

  • MAN ES Overhaul Manual.