How do you backflush a heater core?

1999 MAZDA MILLENIA
119,000 MILES
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CRAIG66
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Keep hearing a gurgling noise be hind dash
Nov 15, 2011 at 1:30 AM
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JACOBANDNICKOLAS
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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 15, 2011 at 1:33 AM