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valve spring

British  

noun

  1. a helical spring used to hold closed a valve in the cylinder head of an internal-combustion engine

  2. any spring that closes a valve after it has been opened mechanically or by flow pressure

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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The same G forces that tug at the pilot move the valve spring.

From Time Magazine Archive

During practice a valve spring broke in her bikes engine.

From Time Magazine Archive

The flow of air to the G-suit is regulated by a weighted valve spring.

From Time Magazine Archive

The cylinder head was stripped, cleaned and ported, and a Serdi valve job was topped off with new valve seals and a Pro Circuit valve spring kit, which also included keepers and spring retainers.

From Time Magazine Archive

Many forms of valve spring lifters have been designed to permit ready removal of the valves.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

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