The lower spring plate, identified by code K 27502, is an essential support element for the inlet valve spring assembly in the ZV40/48 engine. It provides a stable base that maintains the correct spring tension, ensuring consistent valve timing and proper seating. This component must endure repeated cycles of compression and rebound, and it is built from durable materials to resist fatigue. Its role is crucial in ensuring that the inlet valve operates efficiently, helping the engine achieve optimal air intake and combustion performance.