Thread: Cooling System
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Old 01-24-2013, 03:03 PM
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dolfan13 dolfan13 is offline
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Location: lexington,ky usa
Join Date: Jan 2011
Posts: 1,147
Mein Auto: 545i
Ok ok the flow comes out of the water pump in the top hose that's why its hot,100c plus.The flow returns out of the bottom of the radiator back to the pump.The stock tstat opens at 105c letting hot coolant flow in top hose to radiator.The stock tstat sits in the flow of hot coolant inside the water pump.An INLINE tstat would need to allow or stop the HOT flow not the cold returning from the radiator flow.A tstat in bottom hose might not reach enough hot coolant as the stock housing would still need to be installed.Inline in the top hose would always see the hottest coolant and open at your favorite temp letting flow go to the rad. But the heater aux pump would need to be dealt with as it coolant source would be cut off when my inline tstat was closed.Shoo wee.

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Last edited by dolfan13; 01-24-2013 at 03:05 PM.
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