falcon
25.04.2017, 08:12
относительно недавно моя рекомендация на бензиновых бмв менять штатные крышки расш бачков на 2,0 bar на дизельные 1,4 bar была воспринята в штыки
типа инженеры бмв не дураки и т.д. ([Для просмотра ссылки/изображения нужно войти или зарегистрироваться])
нашел еще более интересное решение
крышка на 1,2 бар на основе OEM компонентов, но перекалиброваная на новое давление
[Для просмотра ссылки/изображения нужно войти или зарегистрироваться]
Catastrophic cooling system failures are a fairly common problem on BMW vehicles. The problem is related to the cooling system maximum relief pressure that BMW has chosen to run, coupled with an almost entirely plastic set of cooling system components.
Most BMW vehicles manufactured between 1982 and 2006 run a cooling system vent pressure of 2.0 bar (29 psi). The problem is that the cooling system components are barely rated to handle that pressure when brand new. As the plastic parts heat cycle hundreds of times while exposed to the degrading effects of heat and coolant, they lose some of their strength. The result can be a ruptured part somewhere in the cooling system.
As you can see from the pictures on the left, ruptures can occur in the radiator tanks, expansion tank, thermostat housing and coolant hoses. Not only can a failure leave you stranded somewhere that you would rather not be stranded, but these engines are very prone to cylinder head warping and cracking when severely over heated. The number one cause of very expensive cylinder head failures is severe over heating during a cooling system failure.
So what is the solution? The system does not need to run that high of a pressure. In fact the industry standard for cooling system pressure is 1.0 to 1.4 bar. After doing extensive research and beta testing on several BMW engines, we decided on an optimum pressure of 1.2 bar. This pressure is high enough to maintain OEM pressure specifications up to 126 degrees Celsius (260F), which means that our cap will not alter your cooling system efficiency in any way. Apparently even BMW has seen the light, since most current BMW models now come equipped with a 1.2 bar cap.
Our cap will limit the maximum coolant pressure to 1.2 bar (17.5 psi) instead of the OEM spec of 2.0 bar (29 psi). Even something as simple as overfilling the coolant recovery tank a little higher than the recommended level will result in potentially damaging pressures when using the stock 2.0 bar cap.
типа инженеры бмв не дураки и т.д. ([Для просмотра ссылки/изображения нужно войти или зарегистрироваться])
нашел еще более интересное решение
крышка на 1,2 бар на основе OEM компонентов, но перекалиброваная на новое давление
[Для просмотра ссылки/изображения нужно войти или зарегистрироваться]
Catastrophic cooling system failures are a fairly common problem on BMW vehicles. The problem is related to the cooling system maximum relief pressure that BMW has chosen to run, coupled with an almost entirely plastic set of cooling system components.
Most BMW vehicles manufactured between 1982 and 2006 run a cooling system vent pressure of 2.0 bar (29 psi). The problem is that the cooling system components are barely rated to handle that pressure when brand new. As the plastic parts heat cycle hundreds of times while exposed to the degrading effects of heat and coolant, they lose some of their strength. The result can be a ruptured part somewhere in the cooling system.
As you can see from the pictures on the left, ruptures can occur in the radiator tanks, expansion tank, thermostat housing and coolant hoses. Not only can a failure leave you stranded somewhere that you would rather not be stranded, but these engines are very prone to cylinder head warping and cracking when severely over heated. The number one cause of very expensive cylinder head failures is severe over heating during a cooling system failure.
So what is the solution? The system does not need to run that high of a pressure. In fact the industry standard for cooling system pressure is 1.0 to 1.4 bar. After doing extensive research and beta testing on several BMW engines, we decided on an optimum pressure of 1.2 bar. This pressure is high enough to maintain OEM pressure specifications up to 126 degrees Celsius (260F), which means that our cap will not alter your cooling system efficiency in any way. Apparently even BMW has seen the light, since most current BMW models now come equipped with a 1.2 bar cap.
Our cap will limit the maximum coolant pressure to 1.2 bar (17.5 psi) instead of the OEM spec of 2.0 bar (29 psi). Even something as simple as overfilling the coolant recovery tank a little higher than the recommended level will result in potentially damaging pressures when using the stock 2.0 bar cap.