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#21 ·
Zatrekaz said:
Mine is the same way... can anyone without problems comment if theirs is like this? Would rule it out as a problem.
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Mine has notices and turns with no resistance in both directions.
 
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#22 ·
Zatrekaz said:
Mine is the same way... can anyone without problems comment if theirs is like this? Would rule it out as a problem.
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bigjohnstud4200 said:
Mine has notices and turns with no resistance in both directions.
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From what I remember, when it didn't have these problems, there was no resistance in either direction.


Basically, following up. Mine only started recently and has been acting up since it started to get cold/my coolant ran out. (Stupid me figured, well it's <30 degrees out, cold air outside means my engine should stay cold. Don't worry, I learned my lesson. Today, I'm gonna try to coolant thing and then I will comment back here on my findings.
 
#23 ·
You guys dont remember me having this issue do you :D

Hope its not the same problem I had ! lol


So for education:

Bleeding the coolant system has been described wrong through this entire thread.

When engine is cool. Open radiator cap. Also remove the 15mm bolt from the cross over tube. (its black and goes from the water pump around behind the engine to the heater core.)
Fill the coolant system to the top of the radiator cap. Now your still gonna have air in the system. I like to squeeze the radiator hose that goes from your lower intake to the top passenger side of radiator. That will help bubble out some air.
Once done with this. Top off the coolant from that tube. Replace bolt.

You might need to do this 3ish times over a couple days to work out the air in the system.




NOW:
I had this heater problem as well. And doing this would help for about a day then would stop working.

I finally gave up and went to a AC/Heat shop.

He popped off the radiator cap and used a testing system.
It was a canister with a blue liquid in it. You put it against the radiator hole. And pull some vacuum through it to get air out from the coolant system. If carbon from the exhaust gasses is present. It will change the liquid to a green color..

This find that you have an exhaust leak into your coolant system. When he tested mine, he did not have to pull vacuum. It was leaking so bad it immediately started bubbling in the tube and turned green VERY fast.

Hence: Bad head gasket.
 
#26 ·
My girlfriend's car is having heating issue also. About 2 years ago i had to change the steel tube that goes from the front of the engine around to the firewall. So, potential for trapped air in sounds from reading earlier in the thread. In the hayne's manual, it suggests to feel of the heater core hoses to see if they are cool or warm. If cool, manual says either hoses and/or core are blocked and not allowing flow OR the heater control valve is shut and not allowing flow. Car is with her at work so i can't check the hoses.

Does anyone know where the heater control valve is? I'm hoping it is at the end of one of the heater core hoses under the hood. Dreading having to dig up under the dash otherwise. This is strictly a water temperature thing. The car is full of coolant and the engine warms up fine. A/C blows cold but can't get heater to do its thing. GF must be tough as she isn't complaining just letting me know the mustang's issue.
 
#27 ·
One more thing, someone in here said the heater core is the highest spot in the water system. Is that right? Proper design would be to make the filler bottle and/or radiator cap the highest spot in the system. Perhaps I can try the vacuum thing that the guy just above spoke of. By the way, if one has a bad head gasket you generally see steam (white) coming out of the exhaust. Oil would also look sort of like a root beer float too.
 
#31 ·
OP, from the description of your symptoms, it sounds like your blend door is sticking. If it was coolant related, turning the HVAC controls on/off numerous times wouldn't make a difference.


BB_cuda said:
Does anyone know where the heater control valve is?
Click to expand...
These cars do not have the valve that you're looking for.
 
#33 ·
Tang Stang said:
OP, from the description of your symptoms, it sounds like your blend door is sticking. If it was coolant related, turning the HVAC controls on/off numerous times wouldn't make a difference.




These cars do not have the valve that you're looking for.
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gaetz1985 said:
This!^^^ Rod always knows WTF he is talking about.. No joke!
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This is like going to the doctor and him tell you that your illness is due to an infection. Well that's all well and good but....how I fix it?
 
#34 ·
slonison said:
This is like going to the doctor and him tell you that your illness is due to an infection. Well that's all well and good but....how I fix it?
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I don't recall whether the blend door is cable or vacuum operated on these cars. Regardless, the first thing to do would be to verify that it's receiving vacuum or that the cable is moving when turning the dial from cool to warm and vice versa. If the blend door is physically sticking, you'll have to open up the HVAC box, which requires pulling the dash.
 
#35 ·
Tang Stang said:
I don't recall whether the blend door is cable or vacuum operated on these cars. Regardless, the first thing to do would be to verify that it's receiving vacuum or that the cable is moving when turning the dial from cool to warm and vice versa. If the blend door is physically sticking, you'll have to open up the HVAC box, which requires pulling the dash.
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All blend doors are vacuum operated. They also have small rods from the actuators.

Sent from my droid using my fingers.
 
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#36 ·
Update: Zatrekaz...

My car recently started to overheat. I proceeded to check under the hood and the reservoir was full so I didn't think it was coolant. Well after pondering what it could be, I opened the radiator cap and the damn thing was empty...

I poured an entire 1 gallon of the 50/50 coolant from the gas station I was in and the radiator gobbled it right up. Now I've been told that the capacity is ~7 gallons, so I'm pretty sure my car is barely making it by right now. However, I would like to add that the heating in the car was fixed after 10 minutes of driving and I haven't had a single problem since. I have a feeling that the heater core was not getting ANY coolant to it.
 
#37 ·
Fink said:
All blend doors are vacuum operated...
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You mean all blend doors in these cars are vacuum operated. Blend doors aren't always vacuum operated in other vehicles.
 
Discussion starter · #38 ·
All really helpful information everyone. I plan to take the car in to get like three things fixed soon, and this is one of them.

I will check the coolant, but I highly doubt that is it.

Tang, thanks for the thoughtful response.
 
#39 ·
Tang Stang said:
You mean all blend doors in these cars are vacuum operated. Blend doors aren't always vacuum operated in other vehicles.
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Yes i should have clarified that i was talking about our mustangs.



Sent from my droid using my fingers.
 
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