Definition of piston ring in English:
A ring on a piston sealing the gap between the piston and the cylinder wall.
- Random leak testing is also recommended because any cylinder leakage indicates a bent valve or a faulty piston ring.
- The downside is that tiny amounts of oil can force their way up past the piston ring into the combustion chamber.
- Something was broken and Bill and I suspected he'd blown a piston ring.
Definition of piston ring in:
- US English dictionary
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