Is the manometer used for testing the coolant system psi?

A manometer is specifically designed to measure pressure in various water, gas, or air systems, and there are different types of manometers suited for measuring different parameters. However, when it comes to testing the coolant system psi in diesel engines, a manometer is typically not used. Instead, pressure testing of the coolant system is usually conducted with a specialized coolant pressure tester, which has specific calibration for this purpose.

The primary function of a manometer is to indicate the pressure relative to atmospheric pressure, which can be useful in many applications, but it may not provide the accuracy or specifications required for testing the cooling system pressure of diesel engines. Therefore, the assertion that a manometer is used for testing coolant system psi is not accurate.