Heater Core Flush time... Which hose is IN/OUT ?
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Professional
Joined: Dec 2008
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From: Troy, Ohio
Heater Core Flush time... Which hose is IN/OUT ?
I need to flush out the heater core in my 98 Dakota.
What is the direction of flow through the heater core ?
Which hose is the IN/OUT ?
TIA
What is the direction of flow through the heater core ?
Which hose is the IN/OUT ?
TIA
Champion
Joined: Oct 2013
Posts: 3,774
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From: Atlanta
Doesn't matter, you flush in both directions. Flush and more importantly, back flush. Don't go too high with the water pressure.
Legend
Joined: Feb 2005
Posts: 8,058
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From: Fort Worth, TX
it's not the use that makes it plugged- it's constantly flowing even with AC on- it's sediment and debris from the rest of the cooling system that gets stuck in the heater core and clogs the flow of water.
Champion
Joined: Oct 2013
Posts: 3,774
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From: Atlanta
Mostly, it clogs when people mix coolants that should not be mixed, or use water with minerals vs distilled.
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Professional
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From: Troy, Ohio
