Coolant bubbling out of resevoir

Tiny
W9NL
  • MEMBER
  • 1999 FORD TAURUS
  • 145,000 MILES
Only happens when you shut off the car when hot. Temp gauge doe not indicate overheating. New thermostat installed. Coolant rusty and has been flushed several times over the past years. Cooling Fans do NOT seem to be running although I did see them come on once last night when I turned on the A/C (A/C not working either). I understand there is a temp sensor on on the bottom f the resevoir and a Cooling Fan Switch which I have no idea on the location. I think I need to find out why the fans are not working first. Any thoughts?

Thanks in advance!
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Tuesday, September 13th, 2011 AT 2:05 PM

7 Replies

Tiny
ASEMASTER6371
  • EXPERT
Taurus has severe issue with rust and the water pump impeller failing. It needs to be checked by a shop to verify. Also, have them do a leak down test to verify the head gaskets are ok. I suggest not driving it until you have this checked.

Roy
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Tuesday, September 13th, 2011 AT 4:01 PM
Tiny
W9NL
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A quick update. I found that the temp sensors are located right by the thermostat location. The one closest to the firewall has a single wire connected to it on the plug and that one is for the instrument panel temp gauge. I verified this by disconnecting with the car running and the gauge drops totally down. When I disconnected the sensor closest to the thermostat (has 2 wires on that sensor) my fans started running. Took the car for a drive and no overflowing of the resevoir when I turned the car off. I do now have a check engine light on, but I'm guessing that is from the sensor being disconnected. So I'll try to replace the sensor and see what happens.
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Tuesday, September 13th, 2011 AT 4:06 PM
Tiny
ASEMASTER6371
  • EXPERT
By removing the wires on the coolant sensor. The computer sees high temp and fires off the fans. It does not mean it is bad.

If there is air in the system and the coolant sensor is not in fluid, it will not fire off the fans. You need to find out why the air is in the system. Thats why I said to have the system checked for a head gasket as it will air up the system.

Roy
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Tuesday, September 13th, 2011 AT 4:23 PM
Tiny
W9NL
  • MEMBER
Thanks Roy, you might be right. But I'm going to try the sensor to start with and see what happens as it's a cheap easy fix. Maybe it won't solve the problem, but it's worth a shot. When I did remove the sensor it pretty much came apart at the connector so I need to replace it now anyway.
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Tuesday, September 13th, 2011 AT 4:35 PM
Tiny
ASEMASTER6371
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Hope it works for you. If not get back to me.

Roy
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Tuesday, September 13th, 2011 AT 5:16 PM
Tiny
W9NL
  • MEMBER
Replaced the sensor and still have the same symptoms. Bummer.
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Tuesday, September 13th, 2011 AT 6:41 PM
Tiny
ASEMASTER6371
  • EXPERT
Sorry, we are back to square one. I still think you need to have a leak down test for a possible head gasket. Also, the water pump impeller should be checked for being rotted away.

Roy
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Tuesday, September 13th, 2011 AT 6:49 PM

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