dumb question on cooling system
Thread Starter
Intermediate
Joined: Aug 2014
Posts: 39
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dumb question on cooling system
hey guys, maybe a dumb question but 2 engineers at the office couldn't answer it..
If when the thermostat is closed the water pump circulates coolant through the engine only, why doesn't it push some of the coolant through the lower radiator hose? The thermostat only closes the upper radiator hose, what keeps the lower one closed?
Thanks!
If when the thermostat is closed the water pump circulates coolant through the engine only, why doesn't it push some of the coolant through the lower radiator hose? The thermostat only closes the upper radiator hose, what keeps the lower one closed?
Thanks!
Melting Slicks
Joined: Mar 2005
Posts: 2,093
Likes: 297
From: Midlothian VA
hey guys, maybe a dumb question but 2 engineers at the office couldn't answer it..
If when the thermostat is closed the water pump circulates coolant through the engine only, why doesn't it push some of the coolant through the lower radiator hose? The thermostat only closes the upper radiator hose, what keeps the lower one closed?
Thanks!
If when the thermostat is closed the water pump circulates coolant through the engine only, why doesn't it push some of the coolant through the lower radiator hose? The thermostat only closes the upper radiator hose, what keeps the lower one closed?
Thanks!
Lower hose is the supply/suction side of the radiator.
Nothing to draw until the thermostat opens.
Drifting
Joined: Mar 2011
Posts: 1,347
Likes: 121
From: Kernersville NC
Water does circulate through the engine if there is a bypass hose installed. There is no circulation to the radiator through the top hose until the thermostat opens. Then coolant moves to the engine through the lower hose.
