![]() ![]() Just as you want to make sure you protect your brand new army of tractors by purchasing insurance, OEMs requested that coolant manufacturers add nitrite into OAT-infused extended life coolants they did so, hence nitrited organic acid technology (NOAT) coolants. Let’s drop the acronyms for a minute for a quick point of clarification: Extended life coolants employ organic acid technology, which most coolant manufacturers, including those interviewed for this story, agree provides the proper cylinder protection alone. “When OATs were introduced,” Cook continued, “even though OAT lab studies showed they protected wet sleeve liners, OEMs were reluctant to give up having nitrites.” “The nitrites coat the cylinder walls and reduce this detrimental cavitation effect.” ![]() “The combustions inside of the cylinders cause the walls to vibrate, resulting in small vapor bubbles that then collapse on cylinder walls picking away at the metal,” added Dan Holdmeyer, Chevron’s North America industrial sector manager. Long before the development of Organic Acid Technology (OAT) or ELCs, nitrites were use to protect wet sleeve liners in heavy-duty engines from cavitation damage, recounted Frank Cook, chief technical officer for Old World Technologies. ![]() So come along as we clarify your coolant options. That plus the plethora of acronyms-IAT, HOAT, OAT, NOAT-and the fact that not all manufacturers follow the coolant color guidelines established by TMC, and there’s plenty of room for coolant confusion. Today, most fleets are running some sort of extended life coolant (ELC), but the chemistry of ELCs can vary wildly. Ensuring that your engines are running at optimum temperature to be as efficient as possible starts with filling with the proper coolant. Cooling systems can be a major culprit in causing catastrophic engine failures. ![]()
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