What happens when the pressure in Gen 5 piston cooling nozzles exceeds 17.4 psi?

When the pressure in Gen 5 piston cooling nozzles exceeds 17.4 psi, the nozzles are designed to open, allowing for an increase in flow to ensure proper cooling of the pistons. This mechanism is critical for maintaining optimal engine temperatures and preventing overheating. The design of these nozzles enables them to respond to pressure changes efficiently; when pressure reaches a certain level, they activate to provide the necessary cooling. This ensures that engine components remain protected during operation, helping to extend the life of the engine and maintain its performance.

The other outcomes mentioned do not align with the intended function of the piston cooling nozzles as they are engineered to enhance cooling when necessary, rather than to shut off or reduce flow under pressure, or cause any damage to the engine.