![]() In some instances, your coolant provider may be able to help you out and provide that analysis for free. ![]() If you want to find out what type of coolant is in a truck and can’t track down the answer, there are various services in which you can provide a sample of your coolant for analysis to determine the type of chemistry that is being used. “This is because the nitrite free coolants listed above incorporate corrosion inhibitor technologies that protect the cooling systems of heavy-duty cooling systems without the need to add and replenish nitrite,” he said. That said, Sean Wheatley, senior brand manager for Peak Commercial & Industrial, said that despite the desire of fleet maintenance technicians to test for the presence of nitrite, there are absolutely no concerns at all with using an OAT-nitrite free coolant as a top off with any cooling system. While you might not have control over what gets added to the truck when it’s out on the road, these steps will help you mitigate your coolant contamination risk. ![]() Also be sure your techs are thoroughly trained in the proper coolant procedures. To combat confusion, make sure that your coolants are properly marked and clearly labeled. Also, if a system was running a NOAT and someone added OAT, the nitrite level would be diluted and possibly compromise cavitation protection, explained Mike Tourville, marketing director for Evans Cooling. Hybrid organic acid technology (HOAT) is not compatible with OAT or NOAT coolants. It’s important to keep an eye on what coolant is being added to your trucks. “Surge tank labels are also essential to identify the correct and recommended coolant for use in the vehicle.” “The best way to combat contamination is to provide education and training to drivers and technicians on the importance of using the correct coolant and to avoid mixing different types of coolants,” said Fred Alverson, principal engineer, coolants, Shell Global Solutions. But where did it come from? The biggest causes of contamination are typically due to top-off/make-up with foreign coolants on the road and/or repair or maintenance work on the engine or cooling system resulting in contamination. When coolant turns brown, it’s a tell tale sign of contamination. Although TMC has established recommended colors for varying types of coolants in RP-351, not all manufacturers follow the color guidelines, according to Dilley. One important note is to not rely solely on the coolant color to indicate the type of chemistry (IAT, HOAT, OAT, NOAT) used in the coolant. Joe Heitker, Senior Director of Strategic Sales, KOST USA, Inc.Emily Featherston, Product Application Supervisor, POLARIS Laboratories.Different types of coolants and what is best for your fleet.Want to learn more about coolants? Attend this webinar to learn about: If the cooling system becomes damaged, you risk the possibility of the engine overheating causing downtime for your business. Not monitoring the coolant could result in corrosion and/or sludge, which can impact proper function of the cooling system. Coolant can break down and become less effective over time. Did you know coolant is just as important as your engine oil when it comes to your fleet? Coolant needs to be monitored and tested because mechanical and/or chemical reactions can take place hindering the performance of the coolant.
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