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is there a chance that one of your heater hoses are clogged? or where they connect to the engine are clogged still? sounds like a clogged system. Cracked heater housing? Outside air bypassing the heater coil while driving?
You either have air in the system. Or your cooling system has cavitation. If it's cavitation you need to replace your coolant because the additive package in the coolant is gone.
disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec
The brown looking chiffon could be oil in the water. However, if you are sure the system is ok then I would check the actuator door motor on the heater and make sure it is allowing the heat into the car. Seems as if you have done as much as you can.
With the vehicle cool, remove the radiator cap, and manually pump the lower radiator hose until all the air is out of the system. That is how you get the air out of the system. If it is still overheating from there then you should check the fan to make sure that it is working correctly.
Hello did you flush out the cooling system while you had you coolant drained?this would be ideal to do at t hat time.Also be sure to bleed All air out of cooling system to avoid air lock.
Airlocked? Often by pulling a line of an air buble will be relased. moving hoses so they can fill with water and the air can pass works too. You did not mention the engine you have. Mine is the 2.3, when I drained, flushed and refilled the system had no major problems. there is a air bleed line from the water outlet (under ps pump, left side of engine) to the plastic bottle, right front. the restriction is in the niple at the pastic bottle is it pluged preventing the air to bleed? I always drill a 1/16 hole in the flange of a new thermostat when replacing it, that helps the air to escape and the system to better fill. The thermostat is on the return to the engine, water pump inlet, under the exhaust manifold (not a great design)
It could be air locked. Feel both your heater hoses, and, with the engine running, loosen the one that's cold, if there is one. If that doesn't help, it is probably your heat control valve that is malfunctioning.
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