What is used to determine if the correct amount of coolant additives exist within the cooling system?

The use of test strips is a reliable method for determining if the correct amount of coolant additives exists within the cooling system. These test strips are designed to provide an immediate visual indication of the chemical concentrations in the coolant. By dipping the strip into the coolant, the user can quickly compare the resulting colors to a reference chart, which denotes the levels of essential characteristics such as pH, freeze point, and the concentration of corrosion inhibitors.

This method is favored because it is straightforward, does not require extensive training, and provides rapid feedback on the condition of the coolant, ensuring proper function of the cooling system. It helps in maintaining optimal performance and longevity of the engine by ensuring that additives are present in adequate amounts to protect against corrosion and overheating.

In contrast, while coolant color can give an initial visual clue about its status, it is not a precise indicator of the additive levels. A multimeter is not relevant in this context as it measures electrical properties, and a hydrometer is generally used to measure the specific gravity of fluids, which may not directly indicate the presence of coolant additives.