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Discussion Starter #1
07 V6 Mustang, 139,000 miles

My car over heated twice driving down the freeway and 1 minute latter it went back to normal. Then I drove it the next day (thanksgiving) 8 miles, I parked and turned my engine off, opened the hood and it was steaming! 6 hours later I added distilled water (the reserve was almost empty) I started it and coolant was poring out somewhere by the fire wall.
Yesterday (they were booked so I had to wait 3 days( T-day + the weekend)So I drove it (3 miles) to a ford dealership and they said it's the thermostat and housing. They said because the serpentine belt is soaked with coolnet it has to be replace to. They also recommend that all the coolnet hosing be replaced because of age.
So is there any truth to this about my serpentine belt and coolnet hosing??

btw my radiator was replaced in 2010 because of an accident. The rest is stock.

Thanks!
 

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I don't know how you had coolant pouring from near the firewall when the thermostat housing is at the front of the engine, unless it trickled along the valley of the vee. Avoid going for a stock plastic replacement thermostat housing and go for an aftermarket aluminum unit instead.
As for the serpentine belt, coolant contamination may cause it to slip on the water pump pulley so it's better to replace it anyway.
Replacing hardened or cracked hoses is good preventive maintenance, and that includes the heater hoses as well as those from the radiator.
 

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Are you sure it's not a blown intake manifold gasket or a head gasket. If it's pouring out near the firewall that leads me to believe it is not the thermostat housing. By the way, next time have it towed, don;t drive it that way. You could permanently damage your engine.
 

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Discussion Starter #4
Hi All, Thank you for the replies:)

My car is fixed. It was the thermostat housing, all coolant and heater hoses are replaced. Yes I plan to keep this car long term:)

Cheers!
 
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