When pressurizing a cooling system, how much pressure should be applied?

The correct approach to pressurizing a cooling system involves using the amount specified on the radiator cap. This figure is critical because it indicates the maximum pressure that the system can safely handle without risking damage. Each radiator cap is designed with a specific pressure rating, often indicated on the cap itself, which helps to maintain the system's integrity during operation and prevents overheating by raising the boiling point of the coolant.

Applying pressure beyond this rating could lead to potential failures such as burst hoses or leaks at weak points in the system, compromising its efficiency and safety. Understanding and adhering to the pressure rating specified on the radiator cap is essential to ensure that the cooling system functions effectively while preventing damage.