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Ford Bronco

Why does a 1990 Bronco II 2.9 2WD leak coolant just above and left of the thermostat or top radiator hose where a white plug attaches to the engine?


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2004-07-25 04:08:16
2004-07-25 04:08:16

the v6 2.9 litre ford motors cam,e with aluminum heads and after a few years of wear and tear and constant heat they tend to expand and contract until the warp or crack and no longer seal well causing them to leak or blow the motor.

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Follow the top radiator hose from the radiator , where it connects to the engine is where the engine thermostat is located

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Drain coolant. Remove upper radiator hose. unbolt 3 bolts on thermostat housing. take out old one. reverse to install.

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Should be located in a removable housing at the engine end of the upper radiator hose Drain about 1 gallon of coolant from the radiator Remove this housing Note how thermostat is installed Clean both surfaces Replace thermostat and gasket Re-install housing Re-fill coolant slowly to prevent an air lock Start engine and look for leaks Run engine to normal operating temperature with heater on Re-check coolant level

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possible clogged radiator or thermostat not opening all the way hope this helps


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