The upper spring plate with code number K 27528 is a critical part of the exhaust valve assembly in the ZV40/48 engine. Positioned above the valve spring, it evenly distributes the spring load and holds the assembly in proper alignment during engine operation. This plate must endure high temperatures and dynamic mechanical forces, making its precision and material strength essential. By maintaining stable spring compression, it ensures reliable exhaust valve function, directly supporting combustion efficiency and exhaust management in demanding marine and industrial conditions.