Circulation coolant heater install help | Ford Explorer Forums - Serious Explorations

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Circulation coolant heater install help

blue_goose

Well-Known Member
Joined
November 18, 2006
Messages
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City, State
WY
Year, Model & Trim Level
'02 4x4 4.0 200K
Has anybody successfully installed one of these? I spliced into the bottom hose that goes to the heater core and have hooked the heater up both directions in the hose, but I can't get it to circulate coolant. It turns on fine and warms up and I can hear the impellor running but something is preventing it from moving much coolant. Is it the thermostat or water pump thats blocking the coolant from circulating? Any ideas on how I should hook up the hoses to it? I have access to a nice shop now, which is why im doing it at the beginning of summer.....
 






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