1999 Ford Taurus Radiator Fulid Leak

Tiny
FIADRAMA
  • MEMBER
  • 1999 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 175,000 MILES
I can run the car without using the air or heat and there is no leak. After I ran the car I parked it and left it running. Still no leak. I turned on the heater. It got hot, but still no leak, even after 5 minutes. I turned it over to the Max A/C and turned the temperature to Max Cool and the car started leaking again. Turning it back to Heat did not stop the leak. I let the car sit overnight and drove the car to work without the heater or A/C running and the car did not leak. Ion.
Wednesday, June 22nd, 2011 AT 6:05 PM

4 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 34,330 POSTS
Is the leaking liquid clear or green and where is it landing on the ground?
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Wednesday, June 22nd, 2011 AT 6:38 PM
Tiny
FIADRAMA
  • MEMBER
  • 2 POSTS
Green
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Wednesday, June 22nd, 2011 AT 7:08 PM
Tiny
CARADIODOC
  • MECHANIC
  • 34,330 POSTS
There's two tests you can do to find the source of the leak. The easiest is just a normal pressure test. Many auto parts stores rent or borrow tools and they will have a pressure test kit. Pump the system up to 10 - 15 pounds, then search for dripping coolant.

For more elusive and slower leaks, you can add a small bottle of dye in the radiator, drive the car long enough to mix it up and for the leak to start, then search with a black light. The dark purple dye will show up as a bright yellow stain that you can follow to the source of the leak.
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Wednesday, June 22nd, 2011 AT 7:19 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Their is a drain on the a/c case under the hood at the firewall. You need to check for coolant dripping. The heater core maybe bad.
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Wednesday, June 22nd, 2011 AT 7:25 PM

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