How do you backflush a heater core?

1999 MAZDA MILLENIA
119,000 MILES
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CRAIG66
  • MEMBER
  • 1 POST
Keep hearing a gurgling noise be hind dash
Nov 14, 2011 at 5:30 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Usually that is caused by a low coolant level. However, remove both heater core hoses and flush water through one side at a time.
Nov 14, 2011 at 5:33 PM
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