Overheating no heater
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Elder User
Joined: Feb 2003
Posts: 945
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Overheating no heater
My car overheats then backs off to a normal temp. All the while the heater blows cold air then hot. Water pump is new and thermostat is one yr old. This has to be a thermostat problem does it not?
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Blown head gasget can do that too. That was the first thing I saw when we would get a Windstar in with a 3.8 V6. Combustion gas filling the cooling system and antifreeze blowing out the exhaust. Air fills the heater core and you get no heat.
You could just have a leak somewhere though with similar results. Check the heater core for leaking, radiator and all hoses. Take it to a repair shop and have it pressure tested. If they find no leaks its time to have a hydrocarbon analysis done for headgasget leakage.
You could just have a leak somewhere though with similar results. Check the heater core for leaking, radiator and all hoses. Take it to a repair shop and have it pressure tested. If they find no leaks its time to have a hydrocarbon analysis done for headgasget leakage.
