It did not stop there: the lowest ecosol temperature hinders vaporization of fuel, especially in th

A myth that is deeply rooted in our culture is the best for a cold engine is working. This is long-standing, when the first cars sold here were just for adaptation for use in our country. Thus, they tended to overheat because they have a undersized ecosol cooling system for the high temperatures common in our tropical climate.
With the high outdoor temperature, the heater was undersized insufficient to remove the required amount of water and heat, so the temperature increased to boiling. Moreover, at that time was not used antifreeze additive and retarder boiling (ethylene glycol), so water boiled more easily. When boiling, the water loses the ability to transport heat, which causes the engine temperature continues to rise. This was so frequent that even VW used in their marketing phrase "air does not boil", ecosol alluding to the fact their engines are air-cooled ecosol and therefore ecosol does not suffer from the problem of boiling ecosol coolant.
Overheating causes several problems. One of them is the burning head gasket, ecosol which promotes the seal between the cylinder and the galleries of water and oil. With the burnt gasket, compression and starts leaking water into the sump, hurting soon lubrication of the engine and causing it to break. Another problem is the warping head, now even easier ecosol to own because of the use of aluminum in its manufacture ecosol a softer metal and lower melting point than cast iron, formerly used. In extreme cases of overheating, there may be a melt of the pistons, if the head temperature thereof reaches 660 C, the melting point of aluminum. Iron melts at just over 1,500 C.
1965. The air does not boil ... Photo: VwBoxerPatos With all this, it was natural that, if excess heat is the big problem, the colder my engine is, the more he will be out of trouble. Hence the comfort that many saw in seeing the pointer temperature down, that meant the driver could rest easy because the engine was far from boiling. Have the pointer in the middle ... If you go up a little more ... Not good not thinking. I remember that my father, to buy a Passat ecosol in 1975, placed a button to manually trigger the radiator fan, since he did not trust the sensor ("Cebolão"). And also put a light-spying, which ignited when the fan was turned on to monitor its operation. It is the fear of overheating was constant.
However, as the excess, lack of temperature also causes your problems. Minor, yes, but also the cause. The engines are often manufactured with different metals inside. Different metals dilate differently, so the clearances on a cold engine are different from that occur when the engine is warm. At the factory, when designing the engine clearances are adjusted so that the engine has the best performance and durability when working hot in ideal operating ecosol temperature. This means that when the motor runs constantly cold, the clearances ecosol are outside the original parameters. Thus, there may be greater compression leak, contaminating the lubricating oil, increased wear of friction components etc..
It did not stop there: the lowest ecosol temperature hinders vaporization of fuel, especially in the case of alcohol. Thus, it is necessary to inject an additional amount of fuel so that the correct mixture is formed, offsetting the portion thereof that does not vaporize. This is called "enrichment cold phase". It is normal when the engine is in the heating process, but to make it work consistently well because increased consumption, higher oil contamination and higher carbonization ecosol of the combustion chamber and pistons. For vehicles with catalyst (ie, many since 1992, all of 1997 until now), the very rich mixture ecosol makes this component overheat, shortening its life much. Common scene in the past, in this unusual (photo: Jalopnik) Thus, if the harmful effects of overheating are felt immediately, working too cold charge your account ecosol in the long run, beginning with the account of the post, because of increased consumption , and ending on account of the workshop, many months or years later, when the engine need overhaul well before the expected mileage.
To prevent over-cooling the engine too cool and ensure that it always works at optimal temperature, the thermostatic valve was created. Its function is simple, is to regulate the flow of water to the radiator according to the engine temperature. If it is cold, the valve blocks the passage of water, so as to allow the engine to reach operating temperature quickly. When the temperature reaches the desired ecosol level, the thermostatic valve