Test strips for evans waterless coolant8/26/2023 ![]() OAT coolants have been around since the 1990s, but it took a while for them to catch on, says Rich Gapinski, driveline and ancillary senior technologist for Castrol. This can raise the pH of the coolant and cause some issues.”Īs a general rule, Japanese engine makers like Komatsu and Isuzu favor non-nitrited coolants and Cummins and Navistar have recently come out with nitrite-free specs for some of their newer engines. “As the cooling systems become higher in aluminum content and the flow rates get faster in the, the nitrites in ELC coolants get exposed to more aluminum. “I think the industry is moving in the direction of non-nitrited coolants,” Cook says. In some Asian countries, environmental rules prohibit the use of nitrites, and there are some in the industry who are concerned about the affect of nitrites on aluminum in the cooling system. “Modern OAT coolants without nitrite have an inhibitor system that is more than adequate. “There are some people who think that nitrites are necessary to prevent cylinder liner cavitation, but there is a lot of data to show that this is not true,” says Gapinski. There’s a healthy debate over the suitability of ELC formulas with nitrites in them. If you get it too concentrated you start to lose some of your heat transfer properties,” he says. “If you get too much water you start to lose protection and a cylinder liner can pit fairly quickly. “We recommend checking the freeze point using a refractometer,” says Stede Granger, OEM technical manager for Shell Lubricants.Ĭheck it every time you change the oil, Granger says, but also recheck it anytime there is a change – if coolant is lost during a maintenance procedure or a driver or operator tops up the radiator. Pre-diluted coolants are good for top-offs when de-ionized or purified water is not available. The only routine maintenance you need to perform on your ELCs is to check the freeze point, which will tell you the concentration of the coolant – typically 50/50 coolant to water, but sometimes 60/40 is used in extremely cold weather. There’s a lot you can do with your regular senses – sight and smell.” If your coolant is brown, that might indicate rust or corrosion. “If there is a head gasket issue, you might get oil in the coolant. ![]() “People will contaminate a system sometimes, and you can catch that by just looking at the color of the coolant and checking to see if anything is floating around in it,” Snyder says. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |