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2006 V6 Coolant Leak

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Old 02-19-2015, 07:03 AM   #1
Oriolesfan89
 
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Default 2006 V6 Coolant Leak

Hello all,

A week or so ago, after noticing my heat was not working, I discovered that I was completely out of coolant. I refilled my coolant with Prestone 50/50 and it seemed all was well. Since then, my coolant keeps emptying out and I'm having to refill it again every several days. I've done a few visual inspections and haven't been able to locate the specific location of a leak. Sometime when I'm driving or for a few minutes after cutting the engine off, I'll notice steam coming out from under the hood. I'd really like to figure this out and repair/replace whatever the leaky part is on my own because I'm training for a new job right now and probably can't afford any significant repairs until at least the end of next month. Any sort of help would be much appreciated.
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Old 02-19-2015, 07:55 AM   #2
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Check your thermostat housing. Unfortunately the OEM is made of plastic and over time will break causing your coolant to leak. If you do a search on this forum you will find a link for a metal and better one.
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Old 02-19-2015, 07:57 AM   #3
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Check out these threads.....may sound familiar to you;

http://mustangforums.com/forum/4-0l-...t-housing.html
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Old 02-19-2015, 11:43 AM   #4
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The '05 thru '10 4.0L Mustangs do use a plastic t-stat housing. Cracking of these housings has been a chronic issue with many owners. Why some fail and others don't is your guess. My wife has an '06 4.0 and has had no problems but only has a bit less than 60k miles. I bought one of the aluminum housings for her car, just in case.
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Old 02-19-2015, 01:52 PM   #5
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Thank you for the help! I ordered an aluminum thermostat housing and will probably be back on here when it arrives for help installing it.
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Old 03-01-2015, 03:29 PM   #6
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Alright, so I got the replacement upper and lower thermostat housing. I started trying to install it, but I'm having trouble removing the hoses from the thermostat housing. Any sort of help or tips would be appreciated. Thank you!
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Old 03-06-2015, 09:43 AM   #7
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Oriolesfan89 did you resolve your issue? You can send Nuke a pm I'm sure he can help you.
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Old 04-10-2015, 06:09 PM   #8
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My thermostat failed on the way to my volunteer job last fall. The temp gauge was okay and only a couple minutes from job parking lot. Lucky. After almost nine years, and 130,000 miles, it failed. At the same time, all the hoses were replaced too. My mechanic replaced everything same day and good to go again. I think after 4 years and time for antifreeze replacement, I'll have him change out the thermostat.
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Old 04-10-2015, 06:09 PM
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