What happens when the valve spring tension is insufficient?

[GabrielaDella]

When the valve spring tension is insufficient, it can lead to reduced power, increased fuel consumption, and more carbon deposits. Here are the details: 1. Principle: The valve relies on the valve spring to return to its position. If the spring's elasticity weakens, it may delay the valve's closing time, potentially causing gases in the cylinder to flow back into the intake manifold or escape through the exhaust pipe. This results in insufficient air intake, affecting engine power and combustion, leading to carbon buildup and increased fuel consumption. Over time, carbon deposits can accumulate around the valve, preventing it from sealing properly. 2. Function: Valves are responsible for introducing air into the engine and expelling exhaust gases after combustion. Structurally, they are divided into intake valves and exhaust valves. The intake valve draws air into the engine to mix with fuel for combustion, while the exhaust valve expels the burned gases and aids in heat dissipation.