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- In a [[reciprocating engine]], the cylinder is the space in which a [[piston]] travels. ...ich also provide seals for compression and the lubricating oil. The piston rings do not actually touch the cylinder walls, instead they ride on a thin layer917 bytes (137 words) - 18:06, 9 May 2023
- ...retor adjustment or a poorly performing fuel injection system. Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber,2 KB (251 words) - 03:36, 3 April 2020