2000 Mustang V6 Overheating no hot air! - Ford Mustang Forum
 
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post #1 of 7 (permalink) Old 12-06-2010 Thread Starter
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2000 Mustang V6 Overheating no hot air!

I've got a 2000 3.8L mustang w/186,000 miles. This morning, I warmed the car up like normal and noticed it was a bit hotter than when I'm usually ready to go (but not up to normal temp). Had the defroster on and windows were still frosted. About 3 miles away, I realizes the car was only blowing out cold air, no heat at all. A few miles later, it began overheating so I pulled over and had it towed home. There is no coolant leaking from anywhere and the coolant hoses are warm and under pressure. Any ideas what could be causing this?

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post #2 of 7 (permalink) Old 12-06-2010
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Have you checked the fluid level? My first guess would be that the level has gotten too low, and air has gotten into your system.

This just happened to my wife's van, and I had to bleed the system this weekend. Now it works fine.


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post #3 of 7 (permalink) Old 12-06-2010 Thread Starter
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Yea, coolant level is perfect, just had a flush about 3 months ago. My bf thinks its air in the system but just wanted to get some other ideas of what it could be just in case. We are gunna flush it again tonight and see.
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post #4 of 7 (permalink) Old 12-06-2010
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The V6 WILL overheat if the coolant re-fill procedures are not followed and all air is removed. If there is any air trapped inside the motor, this will block the flow of coolant and delay the t-stat from opening.

Did you open the engine coolant vent and check for any trapped air (engine cold)?

Also, check for a bad water pump as a possible source of air in the cooling system. Bad head gaskets are another possible source.

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post #5 of 7 (permalink) Old 12-06-2010
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It could be low on coolant, or the thermostat is stuck. If the system was flushed 3 months' ago and has not been a problem, it is not air in the system. Bleed the system, but I don't think that's the problem. Also, check for proper antifreeze/water mixture. It could be the pump as wmburns stated above.....

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post #6 of 7 (permalink) Old 12-07-2010 Thread Starter
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Thanks everyone! Turned out to be a combination of slushy coolant, a frozen hose, and air in the system. It's all fixed and I'm back to drivin my baby
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post #7 of 7 (permalink) Old 12-09-2010
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If your coolant was slushy, that means you had too much water and it froze. You really should be at a 50/50 mix of coolant & water in the wintertime!

I buy the premixed stuff for winter cuz it's easier...

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