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Old 07-06-2013, 04:56 PM   #1
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Guess what's wrong

Soo Im pretty sure its a result of a bad heater core but I wanted to hear what you guys think. When I start my car I hear a water fall sound coming from behind my dash and my heat doesn't blow hot.
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Old 07-06-2013, 07:22 PM   #2
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If it was your heater core there would be coolant leaking on your feet
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Old 07-06-2013, 07:24 PM   #3
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It's probably an actuator.

Cheap cost part but expensive to get it replaced.

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Old 07-06-2013, 07:34 PM   #4
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There's no coolant leaking on my feet thank god!
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Old 07-06-2013, 07:40 PM   #5
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Well on the passenger side there would be a leak
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Old 07-06-2013, 07:48 PM   #6
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Rhe passenger side was dry no signs of leaks there.
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Old 07-06-2013, 07:58 PM   #7
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Then i don't think you have a leaky heater core. My jeep made the same noise
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Old 07-06-2013, 08:09 PM   #8
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It doesn't really bother me I just noticed that it made that noise and my heater works just takes a while than usual.
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Old 07-06-2013, 08:11 PM   #9
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It takes a while for cars to heat up they arent going to blow hot air right way
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Old 07-06-2013, 08:44 PM   #10
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I read something about this elsewhere, as my parents jeep does the same thing I think it had something to do with coolant having air or something like that but its not bad just annoying
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Old 07-07-2013, 11:32 AM   #11
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So I went to the dealership and they said I need to do a coolant flush. I guess ill be doing that now hopefully it stops that waterfall sound behind the dash.
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Old 07-07-2013, 12:01 PM   #12
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Make sure you have enough coolant in the engine. If low the heater core drains back to engine and when you start it up the water pump fills it up even before the thermostat opens. That could be the running water sound
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Old 07-07-2013, 12:04 PM   #13
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^^ what he said you probably have a big air pocket in it even though the recovery might be full it still could have one
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Old 07-08-2013, 06:20 AM   #14
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Is the radiator overflow low? Have you ever "opened" the coolant system by changing a hose or thermostat or ?? I'm trying to figure out how, if at all, you got air into the system that would require it to be flushed or "burped". How many miles are on this Mustang that a service department told you it needed a coolant flush?
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Old 07-08-2013, 06:31 AM   #15
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Just looked at my over flow tank and its really low. I have 38k miles on the car.
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Old 07-08-2013, 03:14 PM   #16
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With that kind of mileage I wouldn't worry at all, just take it to the dealer and complain!

Coolant level should be at the cold mark when cold or at the hot line when hot. That certainly should have been identified on the PDI.
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Old 07-09-2013, 09:27 AM   #17
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So yesterday I did the coolant flush and this morning I went out an it was about half an inch below the cold line. I turned the car on this morning and I still heard the water sloshing sound just not as loud before.
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Old 07-09-2013, 11:16 AM   #18
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Quote:
Originally Posted by formulaDstang View Post
So yesterday I did the coolant flush and this morning I went out an it was about half an inch below the cold line. I turned the car on this morning and I still heard the water sloshing sound just not as loud before.
Small leak or a pocket of air still in there? Just guessing from what I read.
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Old 07-09-2013, 11:18 AM   #19
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Do you know exactly how to "burp" the radiator?
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Old 07-09-2013, 11:24 AM   #20
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Try putting the front end up on jack stands to allow the air to go to the highest point. Sometimes this might help and just let the car run with the rad cap off
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Old 07-09-2013, 01:18 PM   #21
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Do you have a cap on you radiator ?
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Old 07-09-2013, 02:44 PM   #22
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I diddnt see one yesterday. I poured the coolant into the overflow box.
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Old 07-09-2013, 05:08 PM   #23
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Do you have a cap on you radiator ?
That's some old school shiz lmao
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Old 07-09-2013, 05:12 PM   #24
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That's some old school shiz lmao
Haha i didn't think so thats the only way i know how to burp a cooling system i mean i guess you can take the over flow cap off and run the engine?
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Old 07-09-2013, 05:14 PM   #25
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Haha i didn't think so thats the only way i know how to burp a cooling system i mean i guess you can take the over flow cap off and run the engine?
Probably but I would just take it to the dealer and tell them it's their problem.
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Old 07-09-2013, 05:15 PM   #26
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Ha true use that warranty !!
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