![]() ![]() This coolant has a high boiling point of 188 ☌ (370 ☏) and is not corrosive, solving many of water's problems including freezing. His final formulation is a mixture of ethylene glycol and propylene glycol. In the 1980s inventor Jack Evans discovered the advantages of using a waterless coolant. In the event of accidental ingestion, emergency medical services should be contacted. However, propylene glycol-based antifreeze should not be considered safe for consumption. Propylene glycol is "generally recognized as safe" by the Food and Drug Administration (FDA) for use in food. It is also used in food, medicines, and cosmetics, often as a binding agent. It is used as antifreeze where ethylene glycol would be inappropriate, such as in food-processing systems or in pipes in homes, as well as numerous other settings. Propylene glycol, on the other hand, is considerably less toxic and may be labeled as "non-toxic antifreeze". In the United States, there is legislation before Congress (H.R.2567/S.1110) that would make the use of a bittering agent mandatory. In order to prevent ingestion, bittering agent ( denatonium benzoate) is usually added to engine coolant to make it taste unpleasant. In practice, ethanol can be administered intravenously by doctors to counter ethylene glycol and methanol poisoning, but now that another antidote is available ( fomepizole), its popularity for this application is greatly in decline. Should ingestion of antifreeze occur, ethanol (alcoholic beverages) can be administered until proper treatment can be started in order to slow the conversion of methanol to formaldehyde and formic acid which are the substances responsible for methanol's toxicity. All spills should be cleaned, or else an area in which it may be present should be kept inaccessible. ![]() They form calcium oxalate crystals in the kidneys and can cause acute renal failure and death. Ethylene glycol antifreezes are poisonous and should be kept away from any person or animal (children and especially dogs) that might be tempted by its sweet taste. Also, the concentration of methanol would tend to be reduced over time due to its greater tendency to evaporate than the water with which it was mixed.Įthylene glycol solutions became available in 1927 and were marketed as "permanent antifreeze", since the higher boiling points provided advantages for summertime use as well as during cold weather. While effective in preventing the coolant from freezing, its low boiling point and low specific heat capacity led to considerably less cooling than water alone. Animals love its sweet taste, so even a spilling a small amount on your garage floor can end up in the dog's stomach pretty quickly.Until the 1930s, methanol was the most widely used antifreeze. Promptly wipe up any spilled fluid as it is highly toxic. Always wear safety goggles when working on your Express 3500. Removing the coolant reservoir cap on a warm engine could cause the cap to fly off at a high rate of speed and fluid to spray out of the reservoir. These coolants will typically say 50/50 or pre-mixed on the front of the coolant bottle. Some coolants will come premixed-that is, you don't need to add any water. Mix the coolant / antifreeze with distilled water so that you have a combination of 50% coolant and 50% water. Be sure to check your owners manual to determine the correct type of fluid to add - for Chevrolets, it will typically be in a section titled Fluid Capacities in the back of your manual. The video above shows you where the coolant reservoir in your Express 3500 is located and how to add coolant / antifreeze. Make sure to check your engine when it is cold for an accurate reading. Engine coolant / antifreeze circulates through your engine to keep it cool in the summer but won't freeze in the winter. Adding engine coolant (also known as antifreeze) to your 2007 Chevrolet Express 3500 is pretty easy. ![]()
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