Final answer:
Valve spring installed height is a measurement used in engine assembly to determine the distance between the lower edge of the top retainer and the spring seat.
Step-by-step explanation:
The subject of this question is Engineering.Valve spring installed height is a measurement used in engine assembly and is specific to mechanical systems. It determines the distance between the lower edge of the top retainer and the spring seat.For example, if the valve spring installed height is specified as 1.5 inches, it means that there should be a 1.5-inch gap between the lower edge of the top retainer and the spring seat when the valve spring is fully installed.