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1999 Ford F-250 Leaking coolant when heater is turned on

1999 FORD F-250
173,000 MILES • V8 • 4WD • MANUAL
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JDP1979
  • MEMBER
  • 1 POST
I have a '99 Ford F250 7.3L diesel. This morning on my way to work I turned on the heater and notice I am leaking radiator coolant from the air ducts that blow down by the floor on the passenger side.
Sep 23, 2010 at 5:46 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Seems you will be needing a heater core. I have good luck with a product called AllUminSeal small tube with silver to copper flakes indside.
Sep 23, 2010 at 8:09 AM
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