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Coolant flow direction

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Old 06-24-2018, 11:26 AM
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Default Coolant flow direction

Hello, all. I own a 1998 Jeep XJ 4.0. I want to flush my heater core but don’t know the direction the coolant flows. Regarding the heater hose that runs off the thermostat housing, does the coolant flow into or out of the heat core through this hose?

Any information appreciated.

Thank you.
Old 06-24-2018, 11:32 AM
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Old 06-24-2018, 12:50 PM
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You should flush it both ways.
Old 06-24-2018, 03:35 PM
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Originally Posted by 00t444e
You should flush it both ways.
Yep... In fact "Back flushing" is best...
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