timing chain

noun
plural timing chains

Definition of timing chain

: a chain that connects the camshaft and the crankshaft in a vehicle engine (such as in an automobile) and coordinates the opening and closing of the engine's valves Much older vehicles will have a timing chain instead of a timing belt… . Timing chains have a much longer lifespan and generally do not need to be replaced.— Melissa Thompson … a timing chain is that part of a vehicle's internal combustion engine that drives the cams and operates the valves that feed fuel into the combustion chambers and extracts spent gases from them.— Joey Bernardez — compare timing belt

First Known Use of timing chain

1912, in the meaning defined above

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The first known use of timing chain was in 1912

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