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Old 03-19-2014, 03:31 PM   #1
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New member Overheating

New member! My 1996 mustang is overheating majorly. Unless I have defrost or mix on my temp. Gauge goes all the way to hot. I need help on what this could be?
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Old 03-19-2014, 03:32 PM   #2
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Is your fan turning on?
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Old 03-19-2014, 03:52 PM   #3
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It comes on but it comes on really late after it's already reached hot
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Old 03-19-2014, 04:11 PM   #4
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Bad fan relay?
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Old 03-19-2014, 04:15 PM   #5
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how's the coolant level?
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Old 03-19-2014, 04:19 PM   #6
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It leaks out overflow.
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Old 03-19-2014, 04:32 PM   #7
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does the light come on? like the coolant light? lil orange square with a fan...
I had a mustang that used to over heat with the air conditioner on so I flushed and filled the coolant and added stop leak and never had an issue again
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Old 03-19-2014, 04:55 PM   #8
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the light only came on a couple of times
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Old 03-19-2014, 04:58 PM   #9
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there is a sensor in the coolant tank if u look in u will see it.. when the coolant goes below that that's when the light comes on... take your oil cap off.. is it all milky? maybe u have blow by.. bad head gasket?... I recommend going to auto store and just buying some stop leak.. poor it in the coolant and see if that helps. should help and just keep an eye on the coolant levels make sure its always where its supposed to be
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Old 03-19-2014, 05:00 PM   #10
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a new thermostat is pretty cheap to and very easy to change on your car. may want to just change it as well.. some maintence to the car is never a bad thing
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Old 03-19-2014, 05:01 PM   #11
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dont use stop leak..... its most likely the thermostat. the oil isnt milky.
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Old 03-19-2014, 05:34 PM   #12
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^ why would u say not to use stop leak?
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Old 03-19-2014, 05:40 PM   #13
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Stop leak can cause more harm than good
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Old 03-19-2014, 05:55 PM   #14
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can you please explain that?... a mechanic I used to go to told me every few years when you flush your coolant and fill it.. that it is smart to just add a bottle
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Old 03-19-2014, 07:51 PM   #15
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Maybe he was talking about an additive that conditions the inside of the motor against rust. I've seen stop leak gum up a thermostat.
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Old 03-19-2014, 08:11 PM   #16
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Stop leak will mess up your motor... My names skyler by the way. I'm moonshine stangs boyfriend. A lot of additives will harm your motor in the long run.
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Old 03-19-2014, 09:58 PM   #17
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^^ lol I thought moonshinestang was a guy.. I guess guys can have boyfriends -_-

^ nope maybe not stop leak specific but yeah for the cooling system.. he said when you change your coolant poor that in and you will never have a head gasket go bad . stop small leaks before they get big..
but yeah mechanics in a can usually are junk
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Old 03-20-2014, 01:37 AM   #18
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Originally Posted by FullyAutomatic View Post
^^ lol I thought moonshinestang was a guy.. I guess guys can have boyfriends -_-

^ nope maybe not stop leak specific but yeah for the cooling system.. he said when you change your coolant poor that in and you will never have a head gasket go bad . stop small leaks before they get big..
but yeah mechanics in a can usually are junk

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Old 03-22-2014, 07:03 AM   #19
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Originally Posted by Moonshinestang View Post
New member! My 1996 mustang is overheating majorly. Unless I have defrost or mix on my temp. Gauge goes all the way to hot. I need help on what this could be?

First a couple questions. Have you noticed any coolant leaking? Any sweet smelling smoke (coolant burning)?

How many miles on the motor?

A thermostat failure will not cause the motor to overheat. Thermostats are designed so that when they break, they stay stuck open. The car will usually run hotter when this happens yes but not overheat. I suspect you may need to replace the water pump. This is easy to do and usually can take a day if you're up to the task. The pump can still need replacing even if it hasn't failed completely--the problem lies with the pumps ability to move enough fluid fast enough so the coolant does it's job and absorbs the heat and gets out of the hot motor. If you have a pump that's on the verge of failing or failed completely, you're not moving the coolant, thus causing the motor to overheat.

The other issue could be a blocked radiator. Check to see that the fins are not clogged with debris. Also make sure then didn't get damaged or bent. When I say damaged or bent--I mean the majority if the rad.

If you have no leaks and you're not burning coolant and/or the system is full of fluid and no visible damage to the rad, then the only thing I can think of is the water pump.

Go to a decent shop and have them do a system pressure test to make sure you have no leaks.

If it's the pump, have it replaced with an factory pump or get a performance pump--Edelbrock has a good one for less than $200. Make sure you have the thermostat replaced as well and get the system completely flushed out and replaced with new coolant.

Stop leak should only be used short term not as a permanent fix and it should only be used if you actually detect a leak. I believe your mechanic friend must have meant for you to use a conditioner that helps preserve the system and prevent rust.

Hope this helps. Let us know what you find out.
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