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Old 10-24-2017, 12:30 AM   #1
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Help

Hey guys so recently I notice that my 05 v6 stang is leaking water, I couldn't find from where. Today I found this thing that looks like it needs a hose or something connected to it. If anyone knows what it is called or where it goes to, please let me know. I will post pics. Thanks in advance!
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Old 10-24-2017, 12:32 AM   #2
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That black thing!!

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Old 10-24-2017, 07:56 AM   #3
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What part of the engine is shown? Is that from underneath?
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Old 10-24-2017, 10:17 AM   #4
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It's from the left side, looking down from the hood

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Old 10-24-2017, 10:21 AM   #5
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Here are more pics on how to get to it

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Old 10-24-2017, 02:27 PM   #6
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What part of the engine is shown? Is that from underneath?
Posted some pics please check them out thank you

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Old 10-24-2017, 02:41 PM   #7
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How is your coolant level?

Does the heater work?

At a glance it looks like a heater core return hose should be there. I will have to look again tonight when I have a bit of free time.
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Old 10-24-2017, 04:30 PM   #8
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I've had too add water a few times already, I haven't tried the heater since it's 100 degrees where I am

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Old 10-24-2017, 07:54 PM   #9
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I would send a message to 3SevenStangVids. He is a member here, and a V6 enthusiast. He can likely tell you exactly what you have going on.
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Old 10-24-2017, 08:13 PM   #10
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That looks like the condensation drain for the HVAC box located underneath the dashboard .
Water will leak out of it while using the air conditioning, and in some cases, the defroster.
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Old 10-24-2017, 08:53 PM   #11
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That looks like the condensation drain for the HVAC box located underneath the dashboard .
Water will leak out of it while using the air conditioning, and in some cases, the defroster.
Is it supposed to be connected to something?

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Old 10-24-2017, 09:02 PM   #12
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I'm not sure. It could have had a short length of hose attached to it at one time, to help direct the water from dripping on to the exhaust and such.

Is that in the general area that you are noticing a puddle of water underneath the car after parking it?
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Old 10-24-2017, 09:04 PM   #13
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I'm not sure. It could have had a short length of hose attached to it at one time, to help direct the water from dripping on to the exhaust and such.

Is that in the general area that you are noticing a puddle of water underneath the car after parking it?
Yes, there is a puddle. I've had to add water a few times now.

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Old 10-24-2017, 09:09 PM   #14
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Are you only noticing a puddle on warm days when you are using the ac?
How much coolant have you had to add to the reservoir? And how often have you had to add it?
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Old 10-24-2017, 09:15 PM   #15
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Are you only noticing a puddle on warm days when you are using the ac?
How much coolant have you had to add to the reservoir? And how often have you had to add it?
I noticed it about 3 days ago, on the first day I added 1 gallon, second day, 3/4 gallon, yesterday 1/2 gallons. I don't use my a/c though, not because it doesn't work, but because I like driving with my windows down.

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Old 10-24-2017, 09:20 PM   #16
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You have a bad leak then.
When the engine is idling at operating temperature, can you see coolant dripping from that pipe?
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Old 10-24-2017, 09:23 PM   #17
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You have a bad leak then.
When the engine is idling at operating temperature, can you see coolant dripping from that pipe?
I haven't noticed that, I believe it's when I turn off the car and it sits

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Old 10-24-2017, 09:30 PM   #18
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Interesting.
I recommend borrowing a cooling system pressure tester from one of the auto parts stores in your area. That way you can pressurize the system and hopefully figure out where the leak is.
And keep a close eye on the coolant level in the meantime!
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Old 10-24-2017, 09:32 PM   #19
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Interesting.
I recommend borrowing a cooling system pressure tester from one of the auto parts stores in your area. That way you can pressurize the system and hopefully figure out where the leak is.
And keep a close eye on the coolant level in the meantime!
I'll do that, by any chance do you know if that tip needs a hose or Anything?

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Old 10-24-2017, 09:40 PM   #20
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I'm not sure. I own the previous generation Mustang, so yours is a little different than my car. I'm pretty sure that is the condensation drain, but not 100%.
I think that if it was one of the heater core pipes, the coolant would be running out of it very rapidly.
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Old 10-24-2017, 09:43 PM   #21
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I'm not sure. I own the previous generation Mustang, so yours is a little different than my car. I'm pretty sure that is the condensation drain, but not 100%.
I think that if it was one of the heater core pipes, the coolant would be running out of it very rapidly.
I also forgot to mention, I also notice some steam coming out of my a/c vents, it happened for 2 days and it stopped

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Old 10-24-2017, 09:49 PM   #22
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Well, I didn't want to just start throwing around wild guesses, but it really is starting to sound like you have a leaking heater core.
Is the carpet damp on the passenger side footwell?
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Old 10-24-2017, 09:55 PM   #23
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Well, I didn't want to just start throwing around wild guesses, but it really is starting to sound like you have a leaking heater core.
Is the carpet damp on the passenger side footwell?
Nope I checked, not wet at all

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Old 10-24-2017, 10:04 PM   #24
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You might be getting sort of lucky, and everything is draining out of the drain pipe, as it should be.
Still do the pressure test, and pay very close attention to that pipe while the system is pressurized. If you see any fluid leaking out of it, there is a very good chance that the heater core is leaking.
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Old 10-24-2017, 10:45 PM   #25
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That looks like the condensation drain for the HVAC box located underneath the dashboard .
Water will leak out of it while using the air conditioning, and in some cases, the defroster.
That was my first thought. However, I don't have that particular model Mustang at my disposal to look at.
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