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Discussion Starter #1
ok so the car has over heated before and blew the heads so we changed the heads and got everything put back together, checked the CCRM (its good) so everything we thought would work like its supposed to. BUT the car is still overheating, at least that is what the gauge is saying. The radiator fluid is not flowing at all and the fan is not coming on at all (hints the over heating) but...

WHY is the fluid not flowing and WHY is the fan not coming on?

Thanks for your help =)
 

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fan will come on for 2 reasons:

1) A/C is turned on. Fan will run 100% of the time the A/C is on. If not, check for voltage at teh fan connector.

2) When the temp sensor (different temp sensor that is used for the dash temp guage) says to turn on. Again, if your temp is high, check for voltage at the fan connector.

Depending on the year of your car, the unit that controls the fan is located on the passenger side near the radiator, then after 96 (I think) it was located under the passenger side fender, in the wheel well.

Make sure your fuses and relays are good.
 

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Discussion Starter #4
we have tried all of the and the CCRM checked out good but the thermostat being on backwards was something that we didnt think about. Thanks for your help =) we are going to buy a new thermostat and put it on ourselves and make sure its on right! =)
 

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check power to your fan, If power is there its a bad fan motor. if no power , Recheck your CCRM (Beware of aftermarket and rebuilt CCRM's)You can run direct power from your battery to check your fan. I assume you checked your fuses
 

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The engine has to be hot enough for your thermostat to open before you will start seeing a flow. Then it will flow for a couple of seconds then quit then flow then quit ect...., until your radiator fluid gets hot. Then there will be a steady flow.
Other than that about all thats left is the thermostat, water pump or a blockage in your system that I can think of.
If your system is nasty and not well maintained any of these could be your culprit.
It will probably take about five or ten minutes at an Idol for your engine to get up to temp.
If you are unsure about your thermostat, take it out and see what happens.
 

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Discussion Starter #8
cool sounds good to me haha
were getting a new thermostat that will open it up sooner because the gauge is getting up to the "A" and the fan or radiator fluid still isnt flowing
 

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Just wondering. How did you re-fill the cooling system? Unless all of the air is removed from the motor, the V6 WILL OVERHEAT. The V6 coolant re-filling procedures must be followed.

http://www.allfordmustangs.com/foru...stang-irregular-rpms-showing-hot.html#2604913

As mentioned before, the fan should run when the AC is on (assuming there is enough Freon). Does the fan run when the AC is turned on? If not, there is SOMETHING wrong with the fan/CCRM/temp sensor/circuit breaker.

But why guess? Rent an ODB2 scanner from your local auto parts store and ask the PCM what it "thinks" the motor's temperature is. Note, if there is air trapped in the motor, the ECT sensor will read LOW.
 
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