WHY WHEN I DRAIN THE ANTIFREEZE FROM THE CAR THE CHECK COOLANT LEVEL WANT COME ON?

  • Tiny
  • checks38
  • 1997 Cadillac STS

I CHANGE THE COOLANT TEMPERATURE SENSOR AND THE CONNECTOR AND STILL WANT COME ON. IS THERE A FUSE THAT CONTROLS IT.

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Sunday, September 4th, 2011 AT 5:44 PM

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  • Tiny
  • caradiodoc
  • Expert
  • 25,428 posts

You don't have to drain the system to replace a sensor, but if you're just draining the radiator and engine, there's still coolant in the reservoir. That's where the level sensor lives.

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Sunday, September 4th, 2011 AT 6:46 PM
  • Tiny
  • checks38
  • Member

I want to know why my check coolant level light want come on.I change the sensor and the connector is there a fuse for it.

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Sunday, September 4th, 2011 AT 7:53 PM
  • Tiny
  • caradiodoc
  • Expert
  • 25,428 posts

You said you changed the temperature sensor, not the level sensor. Did you drain the coolant in the reservoir? If not, the level in it is not low and the light won't turn on. To test the circuit, unplug the level sensor in the reservoir and use a stretched out paper clip or other piece of wire to short the two terminals in the connector together.

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Sunday, September 4th, 2011 AT 8:06 PM
  • Tiny
  • checks38
  • Member

Would the level sensor make the car run hot.I got plenty of coolant.I change the waterpump and thermostat and coolant temperature sensori event in a bottle of head gasket&cooling sealant and its still running hot.

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Tuesday, September 6th, 2011 AT 2:44 PM
  • Tiny
  • caradiodoc
  • Expert
  • 25,428 posts

The level sensor just reports what's happening, it doesn't cause other problems. Most cars don't even have a level sensor.

If the engine is overheating, check for proper operation of the radiator fan and be sure the radiator isn't blocked with debris. If that is okay, have a combustion gas test performed by your mechanic. That involves drawing air from the radiator through a glass cylinder with two chambers partially filled with a special dark blue liquid. If combustion gases are leaking into the cooling system from a leaking head gasket, the liquid will turn bright yellow.

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Tuesday, September 6th, 2011 AT 7:29 PM
  • Tiny
  • cadieman
  • Member

You may have damaged the heads by overheating the car. Go to the parts store and do a hydro carbon test on your coolant to test for blown heads or gaskets. Thanks for using 2carpros

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Tuesday, September 6th, 2011 AT 7:34 PM
  • Tiny
  • cadieman
  • Member

Sorry caradiodoc may bad.

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Tuesday, September 6th, 2011 AT 7:39 PM
  • Tiny
  • caradiodoc
  • Expert
  • 25,428 posts

"Just don't let it happen again" he said with a sarcastic grin.

:)

Carry on.

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Tuesday, September 6th, 2011 AT 7:42 PM
  • Tiny
  • checks38
  • Member

Can it be fix

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Thursday, September 8th, 2011 AT 1:34 PM
  • Tiny
  • cadieman
  • Member

Yes but youll have replace the heads that have cracks in them. Youll need 2 rebuild heads and a head gasket set plus labor.

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Thursday, September 8th, 2011 AT 5:24 PM

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