Definition, Meaning & Synonyms
blow-by
Noun
/ˈbloʊˌbaɪ/
Definition
The leakage of combustion gases past the piston rings in an engine.
Examples
- The engine performance suffered due to excessive blow-by.
- Mechanics often check for blow-by as a sign of wear in the piston rings.
Meaning
Blow-by refers to the situation where some of the gas that is supposed to provide power in an engine escapes past the piston rings into the crankcase instead of being contained in the combustion chamber.
Synonyms
- Gas leakage
- Piston bypass
