Question about 2006 Ford Taurus

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Coolant boiled and no check engine light!

Today, I was going up a local mountain and when I reached the top, I saw the coolant resevoir on the right side of the car , overflow with boiling coolant that sprouted up and drained. I had no check engine light come on. What could be the problem?
I ended up taking the cap off and put in more water.

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IF THE ENGINE OVERHEATED, THEN THIS COULD BE A SERIOUS PROBLEM. IF THE COOLANT CONTINUES TO SPRAY OUT OF THE RESERVOIR WHILE THE CAR IS RUNNING, EVEN IF IT IS COLD, THEN YOU MAY HAVE A BLOWN HEAD GASKET. IF IT DOES NOT SPRAY OUT, THEN IT MAY HAVE JUST BEEN AN OVERHEATED CONDITION CAUSED BY A BAD TEMPERATURE SENSOR OR A BAD COOLONG FAN RELAY/FUSE. SEE IF THE FAN RUNS BY LETTING THE CAR IDLE AFTER IT HAS WARMED UP. IF IT DOESN'T RUN AND THE FUSE AND RELAY CHECK OUT. THEN PERHAPS THE FAN ITSELF HAS FAILED. OR THE TEMPERATURE SENSOR DID NOT TELL THE FAN TO COME ON. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. GOOD LUCK. P.S. IF YOU NEED FURTHER ASSISTANCE THEN TRY A LIVE CHAT TO ANSWER SOME QUESTIONS YOU MAY HAVE.

Posted on May 23, 2009

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You would need to check out the different cooling components. The radiator cap, thermostat, fan for radiator (car should run at 195 degrees), is anything blocking the face of the radiator, are any of the cooling hoses kinked or collapsed, is the water pump circulating the coolant, is thw belt still on the water pump?

Posted on May 23, 2009

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  • Ford Master
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Temp sending unit either failed, is diconnected, or the indicator light is no good. Now remember the coolant recovery reservoir is for that reason, to catch the overflow. if the tank was overfilled to start with, it will overflow. A defective cap may allow premature venting and when the radiator pressure drops the coolant temperature elevates rapidly. Each pound of cap pressure raises the boiling point 2 degrees. Ads the engine cools the overflow is drawn back into the radiator. Removing the cap and adding water and not lowering the level in the bottle will give you the same results next time you pull a hill/mountain. You have a full/full situation. Replace your radiator cap with apprpriate pressue rating.The vehicle may not have overheated and there was no call for a warning lamp alert. the coolant in the radiator was not boiling, but when the cap vented it dropped the boiling point immediately. Good luck and to be safe. I gather it ran fine since?

Posted on May 23, 2009

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