The O-ring with code number K 27051 is specifically designed to seal the cylinder cover in the Sulzer ZV40/48 engine. Made from heat-resistant and pressure-resistant elastomer, this O-ring prevents the escape of combustion gases and protects the cylinder head assembly from fluid leaks. Its function is vital for maintaining compression and ensuring operational efficiency. A properly installed and maintained O-ring also minimizes wear and tear on surrounding components and supports engine longevity in harsh marine environments.