Oil cooler question

[cycleguy55]

Originally Posted by CHANMADD

The oil cooler cannot work properly without a thermostat. It's the same principle as the coolant . It has to , the fluid that is.slow down whilst its in the cooler so that it can cool. If it rushes through it just comes out the other side uncooled, and return to the engine hot.

It's a myth that fluids need to slow down or spend time in the cooler or radiator to properly cool. The thermostat is not there for velocity control, it's there to prevent oil from over-cooling and allow it to get up to temperature as quickly as possible.

"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." Source: http://stewartcomponents.com/index.p...ormation_id=11