Before removing the cap, wait until the temperature is below 50° Celsius (120° Fahrenheit).Do not remove the radiator cap on a hot engine.Test antifreeze coolant before any maintenance is performed.However if you just added additional 100% antifreeze to the overflow container, or if the level is very low, it would not be indicative of the mixture in the cooling system. Generally, liquid in the overflow bottle is representative of the antifreeze coolant mixture in the vehicle. Testing Antifreeze In the Overflow Bottle Antifreeze of 120☏ is cool enough to be handled and the radiator cap is cool enough to remove from the radiator. Colder antifreeze does not have an affect on the rate or final color development. In comparative tests in hot Antifreeze between 70° and 90° C, it was determined that the color development is faster, and therefore the reading will be one color block darker than the reading of the cooler Antifreeze.īest Temperature for Accurate Antifreeze ReadingsĪntifreeze should be less than 120° Fahrenheit. The strip caries a pH indicator, a reserve alkalinity indicator, a buffering agent and a pad that will change color to correlate with various concentrations and freeze points of antifreeze solutions. Immersing a test strip momentarily into a water and antifreeze solution begins the activation process. Test strips come packaged with a chemically treated pad attached to the end of a plastic strip. other atypical conditions found with the use of heavy duty diesel and gasoline engines.Test strips are the only way to determine the exact depletion rate numbers of your antifreeze.Īn antifreeze coolant's inhibitors depletion rate is affected by variations in Regular testing of antifreeze coolant minimizes vehicle downtime and associated costs. Test strips measure the concentration of antifreeze coolant inhibitors in cooling systems using either conventional coolants. Although strips test the freeze point of antifreeze, it can also determine if the antifreeze coolant has become corrosive or if it has anti-corrosive life left to protect the engine.Īntifreeze test strips are a fast and accurate method of checking your antifreeze. How do I know if my antifreeze is protecting my engine against corrosion? The easiest way to test antifreeze for corrosion protection is with test strips. A good antifreeze coolant has an inhibitor combination to protect against corrosion. Corrosion occurs with the other metals in a cooling system, copper, iron, aluminum etc. Rust develops as metals come in contact with air and water. Antifreeze also acts as an anti-corrosive agent. The purpose of coolant is in keeping the engine from overheating by taking heat away from the engine and transporting the heat to the air in the radiator. Coolant is a water and antifreeze mixture that is added to your engine periodically.
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