My car is over heating. Water and coolant evaporating at blink of an eye

Tiny
QUE BROWN
  • MEMBER
  • 2002 OLDSMOBILE ALERO
  • 3.4L
  • 6 CYL
  • AUTOMATIC
  • 240,000 MILES
My car is overheating. There are no leaks. Had a pressure test done. There is no water mixed in with the oil. Changed thermostat, water pump, radiator hose. Service engine light is not on. Went thru 3 containers of coolant within an hour. Can pour gallons an gallons of water into the water tank and it jus keeps disappearing at the blink of an eye. There is nothin leaking out. So where is the water and coolant going? Took car to mechanic shop. They did not see anything wrong and do not know why it's running hot. When open the radiator cap water pours out of the over flow. Bled the car for air. There was a lot of air that came out but then the water started pouring out consistently. Car can run for hours in park without getting hot. But gets hot while in driving on the road. It gets all the way to the red. What can be making the car run hot? Where is all the water and coolant going? And how come mechanics cannot find anything?
Monday, September 5th, 2016 AT 10:00 AM

5 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
With engine warm and engine radiator fan on is there hot air blowing out of the radiator fan?Also has anyone done a chemical block test to see if there are exhaust gases getting into the cooling system?Sounds like there is.
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Monday, September 5th, 2016 AT 10:06 AM
Tiny
QUE BROWN
  • MEMBER
  • 3 POSTS
Yes with engine warm with radiator fan on radiator fan blows hot an no no one has mentioned a chemical block test. Also the heater is cold but after bleeding the cooling system the heater turns hot. Would exhaust gases getting into the cooling system keep making the water and coolant disappear?
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Monday, September 5th, 2016 AT 11:03 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
That would mean the coolant is burning inside the engine you can rent a chemical block tester from auto zone they just make you buy the chemical for it.
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Monday, September 5th, 2016 AT 11:45 AM
Tiny
QUE BROWN
  • MEMBER
  • 3 POSTS
Say if there are exhaust gases getting into the coolant what would that indicate? Also if the coolant is burning inside of the engine what does that mean? Does it mean I need new head gaskets
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Monday, September 5th, 2016 AT 12:10 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
It would mean head gaskets cracked head or block etc.
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Monday, September 5th, 2016 AT 12:39 PM

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