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Hi,we just completed a swap of a 91 KA motor into the kids 90 240sx.Whats happening is the top radiator hose is collapsing and its not cooling right..Could it be the thermostat,air in the system or maybe the pump? Any help on what to try would be great.........Thanks
 

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Hi,we just completed a swap of a 91 KA motor into the kids 90 240sx.Whats happening is the top radiator hose is collapsing and its not cooling right..Could it be the thermostat,air in the system or maybe the pump? Any help on what to try would be great.........Thanks
if you want to get air out of the system. it helps by tilting the car nose up so that the air can go to the front of the motor.

check the thermostat bleed hole make sure its facing up. and if its an old one. i recommend replacing it. id replace the water pump. also just cause its a new motor into a car.
 
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