Piston Ring Gap - Installation Check
Piston-ring end gap at installation and worn - typical 0.1–0.2 % of bore new, scrap at 0.5 %.
New ring gap
0.90mm
Scrapping limit
3.00mm
Status
Within limit
Formula, assumptions, and limits
0.15 % bore new (typical 2-stroke). Monitor gap trend; rising indicates liner or ring wear. Too small → ring butt-to-butt on thermal expansion, seizure.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Cylinder bore | mm | engine spec | |
| End gap | mm | feeler gauge |