Question about 1994 Ford Thunderbird

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Hello i have a 1995 3.8 v6 thunderbird that started to overheat.Ive only had it a week,so I dont know much about it,heres what I do know,new thermostat today, 195 degrees, the cooling fan comes on,I dont know if it is a two speed or not as there are 3 wires at its connector seems to be running at a normal speed ?.setting the heater temperature at 90 degress,it doesnt blow hot air.at the engine coolant vent, coolant comes out, no air, seems full,the radiator and hoses has been replaced fairly recently as the part number labels are still on them.The engine oil looks normal not milky or showing water drops in it.the coolant looks normal green and not milky or sluggy.the mileage shows 91000.

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  • tjboehm Mar 11, 2011

    thanks for responding,this is a 1995 thunderbird,the thermostat can only be put together one way, since the way the neck is made.this one faces to the front, not up, not the easiest to replace.The water pump appears, from looking at it from the outside, to be good nothing from the weep hole.do you think the impeller has failed ? if so how can I tell without taking it off the engine ?

  • tjboehm Mar 11, 2011

    thanks for responding,the thunderbird is a 1995 not a 1994 it may not matter.The water pump looks normal from the outside,nothing leaking from the weep hole.Do you think the impeller has failed ? If so,can I tell without removing it from the engine?The system appears to be full of coolant with no heat from heating and cooling system with the setting at 90 degrees,is ther some two way valve or something?

  • tjboehm Mar 11, 2011

    the top hose does get hot after a while of running which makes sense to me since the thermostat takes time to heat up

  • tjboehm Mar 11, 2011

    my 1995 ford thunderbird,3.8 v6 engine overheats,it has a new 195 degree thermostat,a fairly new radiator with new upper and lower hoses.the coolant system appears to be full of coolant as the vent on the engine releases coolant not air when I checked it for air,the radiator is full.the belt is tight,the cooling fan operates, but shuts off when the ignition key is turned off.the fan appears to be running at a normal speed,there at 3 wires in its connector,could it be a 2 speed motor?

  • tjboehm Mar 11, 2011

    can i tell if the pump is bad without removing it from the engine

  • tjboehm Mar 11, 2011

    when you mention the water pump fins are those the internals of the pump?

  • tjboehm Mar 11, 2011

    the other experts have not addressed the no heat from the heating and cooling system of the car.and is the cooling fan supposed to shut off when the ignition key is turned off when it was running before the key was turned to off

  • tjboehm Mar 11, 2011

    where does the no heat fit into this problem.with the engine temperature up and the heat control set at 90 degrees the inside heat/cool fan blows cool air

  • tjboehm Mar 11, 2011

    can it be unplugged without replacing it

  • tjboehm Mar 11, 2011

    could it be the heater control valve instead of the heater core,can the heater core be unplugged instead of replacing it.

  • tjboehm Mar 14, 2011

    the heater core proved not to be the problem,i,m not sure what to do next

  • tjboehm Mar 16, 2011

    the results of the advise so far has not hit the problem.the exhaust is dual and they both appear to flow normally at idle and when the engine is sped up,what controls the cooling fan timing or operation

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5 Answers

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  • Ford Master
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MAKE SURE COOLANT LEVEL NOT LOW IN THE RADIATOR AND OVERFLOW.WHEN ENGINE COOL DOWN CHECK ANTIFREEZE IN THE OVERFLOW IF EMPTY ADD MORE COOLANT UNTIL REACH COLD MARK.LONG AS COOLANT OVERFLOW DRY COOLANT LOW KEEP ADDING COOLANT TO OVERFLOW KEEP COOLANT IN RESERVOIR KEEP COOLANT LEVEL AT COLD MARK DONT OVER FILL.IF COOLANT OKAY AND WATER PUMP WEEP HOLE NOT LEAKING.MAKE SURE EGR VALVE WORKING IF NOT IF REMAIN CLOSED ENGINE OVER HEAT AND RESTRICTED EXHAUST SYSTEM CAUSE OVER HEATING BECAUSE EXHAUST SYSTEM IS NEEDED TO CARRY HEAT AWAY FROM THE ENGINE.EXHAUST SHOULD NOT BE BLOCKED.CHECK FOR PLUGGED MUFFLER OR CATALYTIC CONVERTER.

Posted on Mar 14, 2011

  • Jonah Oneal Mar 16, 2011

    IF COOLANT FAN WORKING CORRECTLY SHOULD BE BLOWING VERY FAST SPEED NOT SLOW SPEED.EITHER ENGINE BLOCK AND RADIATOR NEEDS FLUSHING OR EGR VALVE STUCK CLOSED MAY ENGINE OVERHEAT.REPLACE RADIATOR PRESSURE CAP.IF TIMING OFF VECHICLE WILL OVER HEAT.

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  • Master
  • 3,400 Answers

I would have system pressured tested first. If it holds pressure have system flushed. From your description it almost sounds like either the heater control valve is bad or heater core is plugged. It could also be a waterpump that is on it's way out. I would start with pressure testing it.

Posted on Mar 11, 2011

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  • Master
  • 10,319 Answers

Heater core is plugged up
replace that and the flow of coolant will cool the engine correctly and you will receive heat as well

Posted on Mar 11, 2011

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  • Ford Master
  • 15,557 Answers

Does it do this all the time?
THere are inefficiencies in electric fans and when the car is sitting and running the temp will rise 10 to 15 degrees. This is normal. When you drive it forces air through the radiator and lowers the temp.
There are only a couple of things that it could be if that is not the case:
1. The radiator is plugged up with gunk..
2. The water pump fins are worn out.

Some other things that can impact it are:
1. It should not be pure antifreeze in the cooling system

Posted on Mar 11, 2011

  • Brad Brown Mar 11, 2011

    The first thing is to check the radiator fins from the inside to see what they look like. There might be too much coolant to get a clear view though. if you see a lot of stuff stuck to the top of the fins when you take the cap off and look in, there is a chance that the fins are plugged. You can have a radiator shop boil it out for you. The other thing about the water pump, this is a last resort after everything is checked then you pull it and it is messy. You have to drain the coolant. Take the hoses off the pump and then remove the pump. You might want to call a dealer and ask for service dept and see if this is a common issue with that make and model

  • Brad Brown Mar 11, 2011

    Yes they are. The pump has to be removed to see the fins. You might be able to take a hose off and see them but it would be difficult

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  • Master
  • 388 Answers

First make sure the thermostat was replaced correctly according to coolant flow (usually the "cone" side facing up). You may have a bad water pump or the cooling system may need a good flush. If you notice any coolant leaking from the bottom of the water pump it will need replaced.

Posted on Mar 11, 2011

  • Steve Martineau
    Steve Martineau Mar 11, 2011

    With the engine at operating temerature check the top radiator hos to be sure it's hot, if so the coolant is flowing. Another easy thing to try would be a new radiator cap with the correct pressure setting as this too can cause over heating if it's gone bad.

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