coolant problem 2002 ford taurus

temp gauge never has reached in the red i can drive the car as many miles as i wish but as soon as i turn the car off water gushes from the overfill
resevoir. have changed:thermostate,water pump, relay switches, heat sensores to no avail. there is not any oil in the fluid so i dont feel it is a head gasket any suggestions?
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intears wrote:

Is the electric cooling fan running? Radiator not plugged up? New radiator cap?
Just because there is no water in the oil does not mean you don't have a leaking gasket. Which motor? any symptoms that lead up to this?
If thats all ok, your going to need to get a coolant pressure test and a test for combustion gas in the coolant.
Bob
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"intears" wrote: coolant problem 2002 ford taurus
i drive the as many miles as i wish temp gauge never reaches the red. As soon as i turn the car off water gushes from the overfill resevoir. Have changed:thermostate,water pump, relay switches, heat sensores to no avail. there is no oil in the fluid so i dont feel it is a head gasket. any suggestions? _____________________________________________________
When the engine is turned off, coolant flow stops and residual heat in the head heats up the coolant some more. The coolant expands when heated, forcing some into the external reservoir.
If the coolant comes boiling into the reservoir, the head is hotter than it should be. This may be the result of lean burning, caused by insufficient fuel pressure, a leaky intake manifold, a stuck IAC actuator or an inoperative EGR valve. Good luck.
Wendy & John. _____________________________________________________
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