Almost all heavy-duty antifreeze is made up of 95% ethylene glycol and 5% water and additives. The antifreeze that isn’t created with ethylene glycol (about 1% of all antifreeze marketed) is made with propylene glycol, which is less hazardous but more expensive. When glycol is combined with various water ratios, “coollant” is produced. Glycol ratios typically range from 30 to 60%.
The ingredient package incorporated into the ethylene glycol distinguishes heavy-duty antifreeze compositions from one another. Of course, all additive packages have the same goal: to prevent rust, scale, and corrosion, as well as to protect wet cylinder sleeves from cavitation in diesel engines. However, the chemical fingerprints of the additive packages in distinct antifreeze formulations are essentially different.
Heavy-duty engines were routinely filled with “conventional” antifreeze until about 15 years ago, as defined by the American Society for Testing and Materials (ASTM) standard D-4985. However, this antifreeze, which is still widely used today, cannot be used in diesel engines without first being treated with a “supplemental coolant additive” (SCA) containing nitrite for wet-sleeve protection. A 3-percent concentration of SCA is required as a first therapy (one pint per four gallons of cooling-system capacity).
The preferred conventional antifreeze for diesel engines today is “completely formulated,” defined by the Technology & Maintenance Council as ASTM D-6210 or RP-329 (TMC). This antifreeze comes with a SCA package that includes nitrate to protect iron and steel, tolyltriazole to protect copper and brass, borate or phosphate to buffer acids (formed as glycol breaks down), silicate to protect aluminum, and nitrite (sometimes with molybdate) to form a cavitation-resistant barrier on sleeves.
These additives, however, diminish as the coolant works and ages, and must be supplied with a SCA package on a regular basis. The maintenance of an adequate nitrite level is very important. However, be cautious because too much nitrite can cause solder corrosion, and too much other additives might cause “total dissolved solids” (TDS) to rise, compromising cooling performance and resulting in passage-clogging dropout. To avoid TDS issues, cautious maintenance guidelines may recommend changing fully formulated conventional coolant every two years.
The antifreeze business produced “extended-life coolants” (ELC), which are formulations with a service life of 600,000 miles or 12,000 hours, to make maintenance easier. Originally, these formulations substituted the additive package found in fully formed traditional antifreeze with “organic-acid inhibitors,” which were supposed to safeguard metal parts by generating a thin protective barrier against destructive forces in the coolant.
The base or neutralized version of organic (carbon-containing) acids, typically (but not always) the carboxylate acids of 2-ethyl hexanoic acid (2-EH) and/or sebacic acid, is used in these “organic-acid-technology” (or OAT) antifreezes. However, most heavy-duty carboxylate formulations also include nitrite and molybdate, as well as silicate, which are commonly found in fully formed traditional antifreeze. Nitrited-organic-acid-technology antifreeze, or simply a NOAT, is a term used to describe OAT formulations that include nitrite.
According to some antifreeze experts, whenever inorganic inhibitors (such as nitrite) are added to an organic-acid-based formulation, a hybrid, also known as a Hybrid OAT, or a HOAT, is generated. Others, however, argue that a hybrid is a product characterized by the usage of non-carboxylate acids, such as benzoate, derived from another organic acid, benzoic acid.
Do you need special coolant for diesel engines?
In a diesel engine, the coolant system is one of the most ignored preventive maintenance items.
Engine coolant maintenance is equally as crucial as changing the oil in your car. In fact, in a diesel engine, the coolant condition may be much more critical than in a gasoline engine.
One of the most common causes of neglect is that owners don’t realize how critical it is to check the coolant’s condition on a regular basis. The state of the coolant is critical to the engine’s lifetime. Antifreeze-coolant on the market now not only protects against freezing in the winter, but also helps protect diesel engines from common cavitation problems.
What kind of antifreeze does a diesel engine take?
ELC (Extended Life Coolant) was developed in the late 1990s, allowing for substantially longer durations between inhibitor replacements. ELC contained OAT (Organic Acid Technology) or Nitrited Organic Acid Technology (NOAT) inhibitors, which depleted at a slower rate than standard inorganic silicate and phosphate compounds. This sort of coolant can last up to 300,000 miles or 6,000 hours in the engine. Even at this mileage, a coolant extender additive can be added to the coolant and the engine can run for another 300,000 miles or 6,000 hours. ELC requires little or no upkeep. It only has to be checked for dilution, clarity, freezing point, and color at every oil change. ELC is usually bright red or pink in color. Typical ELCs can last up to five years before needing to be replaced.
Can you use 50/50 antifreeze in a diesel?
Prestone HD 50/50 Prediluted NITRITE FREE Extended Life (ELC) Antifreeze/Coolant is designed to work with any nitrite-free HD Organic Acid Technology (OAT) coolant in any diesel-powered commercial vehicle or stationary engine with aluminum or other metals. Its nitrite-free OAT formulation is based on a concentrated blend of premium long-lasting inhibitors that protect against temperature extremes, rust, cavitation corrosion, scale, and premature water pump failure. Prestone HD 50/50 Prediluted NITRITE FREE Extended Life (ELC) is an antifreeze/coolant concentrate and demineralized water blend that provides protection for up to 600,000 miles/12,000 hours**. Prestone HD 50/50 Prediluted NITRITE FREE ELC can be added to the antifreeze/coolant of any HD commercial or stationary engine when used as specified.
Things alter as the temperature drops below freezing. We can’t have water in an engine block since it will grow and ruin it quickly. What was formerly referred to as “antifreeze” was created from an ethylene glycol-based base fluid (EG). The original combination would be EG with corrosion inhibitors added specifically, silicates and then topped off with the required amount of water to reach the required freezing value. Inorganic additive technology (IAT) products are the corrosion inhibitors in question. The term “inorganic” will become evident in the near future.
This is, of course, the well-known “green” coolant. It’s all good. And it’s still fine for a variety of engine applications, including today’s small diesels as well as numerous older items that are still in use. It has been an excellent ally for many years, and we may anticipate it to live for many more.
As a side note, the term “antifreeze” is a misnomer. The product has a higher boiling point than the competition, in addition to not freezing.
Can you use regular antifreeze in a diesel tractor?
Coolants used in older engines, such as those found in antique tractors, use Inorganic Acid Technology (IAT), which has a two-year or 30,000-mile life duration. Green is the most common color for IAT coolants.
Organic Acid Technology (OAT) coolants, which were first introduced in 1994, have a five-year or 150,000-mile life duration. Coolants made of OAT come in a range of hues.
To add to the confusion, hybrid combinations of both IAT and OAT compositions are now available.
Finally, coolants are frequently divided into three categories based on their intended use: automotive, heavy-duty, and universal (for both car and heavy-duty engines). The level of chemicals used to defend against rust and corrosion determines the differences between these categories.
Confused? Follow this broad rule of thumb to simplify your antifreeze selection:
Usage green IAT coolants rated for light-duty or universal use in antique tractor engines. Follow the manufacturer’s coolant recommendations when it comes to high-powered modern tractors, as well as today’s vehicles and trucks.
Can you use Peak antifreeze in a diesel engine?
Peak has over 65 years of experience in preserving your vehicle’s cooling system from extreme hot and cold temperatures, as well as destructive rust and corrosion. Ready to use at its best This 50/50 prediluted antifreeze + coolant combination is suitable for older automobiles and diesel engines.
What is the red antifreeze?
Dexcool is a brand of red antifreeze that lasts longer than other types of antifreeze. Organic acid technology (OAT) was discovered after inorganic acid technology (IAT) (explained below), resulting in the production of various colored antifreeze formulations (mainly orange colored antifreeze formulations were produced by this technology). Later, as a mixture of IAT and OAT, the hybrid organic acid technology (HOAT) was developed. Red antifreeze is produced using this hybrid method. Red antifreeze is more stable than green antifreeze and other older kinds of antifreeze chemicals, and it extends the life of water pumps.
What are the different types of coolant?
You’ll need to choose the correct coolant for the task when it’s time to top off or flush the system completely. It would be simpler if all manufacturers utilized the same coolant, but that isn’t the case. Inorganic Additive Technology (IAT), Organic Acid Technology (OAT), and Hybrid Organic Acid Technology (HOAT) are the three primary forms of coolant used by automobile manufacturers (HOAT).
IAT is typically seen in older vehicles. It must be replaced every two years or 24,000 miles, making it significantly less efficient than current formulae. OAT is one of the more recent formulations. This formula is used in General Motors vehicles, and it usually requires a change after five years or 50,000 miles. Finally, HOAT is a derivative of OAT that, unless otherwise specified, requires the same time change interval.
Going to your car’s dealership is the simplest approach to ensure you’re getting the appropriate coolant for the task. They’ll sell you the coolant that’s right for your car’s make and model, and it’ll be the right one. Many times, the coolant is specifically labeled for the vehicle you’ll be using it in.
Honda, for example, sells Type 2 Antifreeze/Coolant through all of its dealers. Others, such as BMW and Volkswagen, do the same thing.
This isn’t something that every company does, though. Dex-Cool is a factory-installed feature on all GM vehicles. Ford, on the other hand, employs Motorcraft.
One thing to remember about practically every current container of coolant you’ll see: they’re all pre-diluted. Coolant used to be marketed as pure coolant, which meant you had to dilute it yourself with water. Of course, pre-diluted coolant is more convenient, but you’ll wind up paying a lot more for a lot less fluid.
Can you use water for coolant in a diesel?
The cooling system uses coolant to prevent corrosion and scale buildup in the cooling circuit and within the engine. Because water can be corrosive at high working temperatures, we should never use it as a coolant in diesel engines.
The use of coolant in diesel generators solves the problems of poor cooling and excessive temperatures. Typically, the cooling liquid should be replaced every one and a half to two years. The genset protection will benefit greatly from the standard cooling liquid refill cycle. It can generate a protective film on the surface of the generator set’s cylinder sleeve, preventing cavitation and decreasing wear and corrosion, extending the genset’s maintenance intervals and lowering maintenance costs. Non-replacement for a long time, on the other hand, will undoubtedly minimize the utilizing consequences. So, what are the issues that should be addressed when utilizing diesel generator coolant?
Clean fresh water, such as rainwater, tap water, or river water, should be used as a coolant. Well water and underground water (Hard water) should not be used directly because they contain more minerals, which can cause limescale to build in the diesel engine’s water tank, affecting the cooling effect and even causing the engine to fail. If only hard water is present, it must be lightly softened before use. The boiling procedure is sometimes referred to as the softening method. Boil the water, then add 0.67 grams of caustic soda per liter and utilize the top water after precipitation.
When the diesel engine is utilized below 0°C, the coolant should not freeze, as this could cause the necessary parts to shatter. As a result, after the diesel engine has finished running, each part’s cooling liquid should be emptied. It can be installed with appropriate antifreeze coolant according to the local minimum ambient temperature when using closed cycle cooling system types.
Because both ethylene glycol and alcohol are flammable components, you should exercise caution when using the flammable antifreeze coolant. The filth in the cooling system should be cleaned before using antifreeze fluid to avoid the formation of new chemical precipitates, which will reduce the cooling effect. It is not required to let out the antifreeze coolant every time the diesel generator stops, but it should be replenished on a regular basis and the composition checked.
Clean the cooling system of a diesel engine with cleaning solution if there is a lot of limescale and filth. Water, soda water (Na2CO3), and water glass can be used to make the cleaning solution (Na2SiO3). To each liter of water, add 40g soda water and 10g water glass. Pour the cleaning solution into the diesel engine’s cooling water chamber when cleaning. When the outlet water temperature reaches 60°C, start the diesel engine and run it for about two hours before parking and releasing the cleaning solution. After the diesel engine has cooled, wash it twice with clean, fresh water, drain and pour into the cooling water, and restart the machine. When the temperature of the outlet water reaches 75°C, park and discharge the sewage, then inject new cooling water.
Coolant is made by combining glycol with a specific amount of water. Glycol concentrations in typical rations range from 30% to 60%. Heavy-duty antifreeze is used in diesel engines to prevent rust, scale, and corrosion, as well as to protect wet cylinder sleeves from cavitation.