1998 Mercury Sable plugged heater core

Tiny
JJBRUG6
  • MEMBER
  • 1998 MERCURY SABLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 117,000 MILES
Would Draino or Baking Soda or some other liquid help? Would hooking up a Water hose direct w/a adaptor work?

How do I remove the heater core and replace it if I can't get it unplugged?
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Tuesday, September 16th, 2008 AT 7:36 AM

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Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
That isnt really a DIY project, the entire dash has to come out of the car to get to the heater core. DO NOT hook a hose directly to it, this could blow the core out and then replacing it will be necessary. Have you tried having a radiator shop backflush the system? You can use a hose, but not full pressure, and try going both directions with it. I wouldnt use too harsh of a chemical there may be o'rings sealing the tubes. Simple Green may be worth a try.
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Tuesday, September 16th, 2008 AT 8:00 AM

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