valve spring

A mechanic carefully installs a new valve spring into an engine cylinder head.

Definition

1. Noun:
   • A mechanical component used in internal combustion engines, typically a coil spring that returns a valve to its closed position after it has been opened by the camshaft. The "valve spring" ensures proper sealing of the combustion chamber and prevents valve float at high engine speeds.

Usage Examples

• (A faulty valve spring was causing a loss of pressure in the cylinder.)
• (Two springs are used together to keep the valve stable at high revolutions.)

Advanced Usage

• "valve spring retainer": A small metal component that holds the valve spring in place on the valve stem.

  • The valve spring retainer must be properly seated to avoid spring dislodgement during operation. (The retainer keeps the spring fixed.)

• "valve spring seat": The surface on the cylinder head where the valve spring rests.

  • A damaged valve spring seat can cause the spring to shift, leading to valve misalignment. (The seat provides a stable base.)

Variants and Related Words

• Valve (n): a device that controls the flow of fluid or gas in an engine.

  • The intake valve opens to allow air and fuel into the cylinder. (A specific type of valve in an engine.)

• Spring (n): an elastic device, typically coiled, that returns to its original shape after being compressed or stretched.

  • The suspension spring absorbs shocks from the road. (A spring used in a car's suspension system.)

Synonyms

• Coil spring for valves: a direct description of the component.
• Engine valve spring: a more general term for any spring used on engine valves.

Related Idioms

• No common idioms directly involve "valve spring." However, in mechanical contexts, "valve spring" is often used literally.

Phrasal Verbs

• No phrasal verbs are associated with "valve spring," as it is a compound noun referring to a specific mechanical part.