When testing for leaks in a cooling system, what is the maximum pressure that should be applied according to Technician A?

In testing a cooling system for leaks, it is essential to apply a pressure that reflects the operating conditions of the system while ensuring safety and avoiding damage. The maximum pressure range of 15-18 psi (103-124 kPa) aligns with typical manufacturer specifications for many cooling systems in diesel engines. This pressure is adequate to check for potential weaknesses in hoses, gaskets, and the radiator without risking damage to the components.

Applying pressure beyond this range, like the higher options, may cause stress on the cooling system components, potentially leading to failures or incorrect results. Hence, 15-18 psi serves as a proper threshold for effective leak detection while remaining within safe operating parameters.