[lookatme]

what happens if you run all antifreeze and no water with it? does this prevent the coolant from reaching it's full operating temp? I've heard that the heat does not transfer as well without the water mixed in with it. <img src="confused.gif" border="0">

[DoubleVision]

straight anti freeze will freeze without water mixed. it`ll also make one run hot. 15 years ago, I never would have believed either of those 2 answers, until I seen it happen to a friends truck.

[johnsongrass1]

Antifreeze doesn't conduct heat as fast as water will so thereby riasing coolant temps. I have never seen antifreeze get cold enough to freeze before. Unless it's old and the ethyl has evaperated.

[willys36@aol.com]

NO substance, liquid, gas, or solid, carries as much heat as water. It is the best heat transfer fluid, period for the temperature range an engine runs at. If it didn't corrode (it is also the best solvent known to man) or freeze (snow- best water storage medium known to man) and boil (steam- best latent heat carrying substance known to man), you would want to run pure water in your cooling system for ultimate cooling performance. Unfortunately, since it does freeze, corrode and boil within the operating range of the automotive engine, we must accept reduced performance with the ethelene glycol additive.

[1BAD80]

Taken from University of Tenn.

Most of the antifreeze products on the market currently are ethylene glycol base material with additives to prevent corrosion, lubricate seals and water pumps and aid in heat transfer to the coolant from the metal of the engine. Antifreeze should be mixed with distilled water at the ratio of one part antifreeze to one part water. This gives freeze protection down to -34 degrees and boil-over protection up to +265 degrees. Never use pure antifreeze in a cooling system without using at least 30 percent water in the mixture. Most antifreeze products sold for the past several years have been the traditional Agreen@ coolant. This type is good for two to three years and up to 30,000 miles. The green antifreeze contains silicates, phosphates and / or borates as corrosion inhibitors to keep the solution alkaline. As long as the solution remains aikaline, corrosion is controlled and the system is protected. Over time, the corrosion inhibitors will be used up and the corrosion protection is lost. it is for this reason that green antifreeze should be changed every two years or so. Aluminum is especially vulnerable to corrosion and many vehicles have heads, radiators and other aluminum components in the cooling system. If the coolant in an engine cooling system is changed before corrosion inhibitors reach dangerously low levels, corrosion damage is prevented.

An alternative to tradition green antifreeze is a relatively new product currently used by many engine manufacturers. AOrange@ antifreeze is a long life or extended life type of antifreeze used to increase the useful life of engine coolant. it is ethylene glycol base as is the green antifreeze. The difference between the two colors is that orange antifreeze contains a different type of corrosion inhibitor that have a much longer service life than silicates, phosphates and borates. Orange antifreeze contains organic acids that protect engine parts from corrosion. Silicate type antifreeze does not mix with orange type antifreeze. Never mix the two colors in a cooling system. The organic acids in orange types will cause precipitation of silicates in the green type and corrosion protection is greatly reduced. Orange type antifreezes are good for five years or 100,000 miles in newer vehicles (1996 and later). They can be used in older vehicles if all of the green mixture is flushed from the system and is replaced with the orange mixture. Useful life is about four years or 60,000 miles in older cars.

Toyota uses a red antifreeze in many of its products and should not be confused with the orange type long life antifreezes. it is essentially the green type of antifreeze that contains red dye to give it the red color.

If you have doubts about switching from the red or green type of antifreeze to the new orange extended life antifreezes, contain your equipment manufacturer or dealer and ask about compatibility with your engine parts and cooling system.

Cummings diesel engines have silicone seals in the engine and do not recommend use of orange antifreeze because the organic acids will cause degradation of the seals after 80,000 to 100,000 miles of use. Coolant can leak past damaged seals into the engine lubrication oil system and plug oil filters with resulting damage to the engine.

The freeze protection level of a coolant mix has little relevance to the corrosion protection afforded by the coolant mix. The freeze level of the mixture may test to a satisfactory protection
level, but corrosion protection may be depleted from time of use. Change your coolant mix on a schedule based on the color of the antifreeze you are using. Severe corrosion to engine and cooling system components can occur with resulting expensive repairs.
Agricultural and Biosystems Engineering

What does it recommend on the back of the container?




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