In a cooling system, a higher pressure equates to a higher boiling point for
the coolant. Higher coolant pressures also transfer heat from the cylinder
heads more efficiently. We recommend using a radiator cap with the highest
pressure rating that the radiator is designed to accept.
A common misconception is that if coolant flows too quickly through the system,
that it will not have time to cool properly. However the cooling system is a
closed loop, so if you are keeping the coolant in the radiator longer to allow
it to cool, you are also allowing it to stay in the engine longer, which
increases coolant temperatures. Coolant in the engine will actually boil away
from critical heat areas within the cooling system if not forced through the
cooling system at a sufficiently high velocity. This situation is a common
cause of so-called "hot spots", which can lead to failures.
>From www.stewartcomponents.com tech tips
|