Hi I have a 99 ford taurus wagon. yes 3l.
What I have done so far is this: replaced hoses near firewall, the metal
harness was a terrible idea from ford, replaced reservoir, replaced
thermostat, replaced heater core and actuator door, the good news I have
heat the bad news there is a leak coming from what looks like a vent near
the passenger side heater core post, what could be causing this?
Could be residual coolant from replacing the heater core or you have a loose hose connection or the core was damaged during the install. You'll have to take it all apart to see.
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