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  Topic Review (Newest First)
January 22nd, 2013 04:17 PM
Fink
Re: Heater issues

Quote:
Originally Posted by Tang Stang View Post
You mean all blend doors in these cars are vacuum operated. Blend doors aren't always vacuum operated in other vehicles.
Yes i should have clarified that i was talking about our mustangs.



Sent from my droid using my fingers.
January 22nd, 2013 03:59 PM
Zatrekaz 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.
January 22nd, 2013 08:37 AM
Tang Stang
Quote:
Originally Posted by Fink View Post
All blend doors are vacuum operated...
You mean all blend doors in these cars are vacuum operated. Blend doors aren't always vacuum operated in other vehicles.
January 21st, 2013 06:45 PM
slonison 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.
January 21st, 2013 06:34 PM
Fink
Re: Heater issues

Quote:
Originally Posted by Tang Stang View Post
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.
All blend doors are vacuum operated. They also have small rods from the actuators.

Sent from my droid using my fingers.
January 21st, 2013 11:22 AM
Tang Stang
Quote:
Originally Posted by slonison View Post
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?
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.
January 21st, 2013 11:12 AM
slonison
Quote:
Originally Posted by Tang Stang View Post
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.
Quote:
Originally Posted by gaetz1985 View Post
This!^^^ Rod always knows WTF he is talking about.. No joke!
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?
January 21st, 2013 10:19 AM
gaetz1985
Quote:
Originally Posted by Tang Stang View Post
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.
This!^^^ Rod always knows WTF he is talking about.. No joke!
January 21st, 2013 08:49 AM
Tang Stang 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.


Quote:
Originally Posted by BB_cuda View Post
Does anyone know where the heater control valve is?
These cars do not have the valve that you're looking for.
January 19th, 2013 08:52 PM
slonison
Re: Heater issues

Stupid question... fill radiator cap with coolant while car is running? I read this somewhere but it sounds like a bad idea...
January 19th, 2013 08:18 PM
mustangmike!
Quote:
Originally Posted by gaetz1985 View Post
That depends on where the head gasket has given out at...
This...

I had a bad gasket leak into my coolant system. No fluids in oil. And not white smoking.

I did noticed some oil in the coolant when I would pop the radiator cap tho. Would be sitting there a floating !
January 19th, 2013 01:22 PM
gaetz1985
Quote:
Originally Posted by BB_cuda View Post
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.
That depends on where the head gasket has given out at...
January 19th, 2013 12:53 PM
BB_cuda 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.
January 19th, 2013 12:49 PM
BB_cuda 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.
December 31st, 2012 02:50 PM
mustangmike! Lisle 75500 Combustion Leak Detector | eBay
December 31st, 2012 02:49 PM
mustangmike! http://www.autotips101.com/cms/media...test_fluid.jpg
December 31st, 2012 02:47 PM
mustangmike! You guys dont remember me having this issue do you

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.
December 31st, 2012 01:41 PM
slonison
Quote:
Originally Posted by Zatrekaz View Post
Mine is the same way... can anyone without problems comment if theirs is like this? Would rule it out as a problem.
Quote:
Originally Posted by bigjohnstud4200 View Post
Mine has notices and turns with no resistance in both directions.
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.
December 31st, 2012 01:37 PM
bigjohnstud4200
Quote:
Originally Posted by Zatrekaz View Post
Mine is the same way... can anyone without problems comment if theirs is like this? Would rule it out as a problem.
Mine has notices and turns with no resistance in both directions.
December 31st, 2012 01:35 PM
Zatrekaz
Quote:
Originally Posted by slonison View Post
So here's an update on mine: I've noticed that when the temperature knob is turned all the way to the right (red - heat) and I try to turn it to the left (blue - cool) the knob feels pretty stiff like I'm pushing again something. However, when I turn it to the right, it feels rather soft and there is almost none, if any, resistance, it's just softly turns. Not sure if it's related to the vacuum system, but maybe.. I really don't want to pull the dash.... :-(
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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